HDFS-4175. Additional snapshot tests for more complicated directory structure and modifications. Contributed by Jing Zhao.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1411503 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas
parent
d8ffea5943
commit
1253e02f66
@ -20,8 +20,15 @@
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertTrue;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Random;
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import org.apache.hadoop.fs.FileStatus;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.hdfs.DFSTestUtil;
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import org.apache.hadoop.hdfs.DistributedFileSystem;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants;
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@ -54,7 +61,7 @@ public static Path getSnapshotPath(Path snapshottedDir, String snapshotName,
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*/
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public static Path createSnapshot(DistributedFileSystem hdfs,
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Path snapshottedDir, String snapshotName) throws Exception {
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assert hdfs.exists(snapshottedDir);
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assertTrue(hdfs.exists(snapshottedDir));
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hdfs.allowSnapshot(snapshottedDir.toString());
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hdfs.createSnapshot(snapshotName, snapshottedDir.toString());
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return SnapshotTestHelper.getSnapshotRoot(snapshottedDir, snapshotName);
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@ -76,4 +83,203 @@ public static void checkSnapshotCreation(DistributedFileSystem hdfs,
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FileStatus[] snapshotFiles = hdfs.listStatus(snapshotRoot);
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assertEquals(currentFiles.length, snapshotFiles.length);
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}
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/**
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* Generate the path for a snapshot file.
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*
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* @param fs FileSystem instance
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* @param snapshotRoot of format
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* {@literal <snapshottble_dir>/.snapshot/<snapshot_name>}
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* @param file path to a file
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* @return The path of the snapshot of the file assuming the file has a
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* snapshot under the snapshot root of format
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* {@literal <snapshottble_dir>/.snapshot/<snapshot_name>/<path_to_file_inside_snapshot>}
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* . Null if the file is not under the directory associated with the
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* snapshot root.
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*/
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static Path getSnapshotFile(FileSystem fs, Path snapshotRoot, Path file) {
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Path rootParent = snapshotRoot.getParent();
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if (rootParent != null && rootParent.getName().equals(".snapshot")) {
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Path snapshotDir = rootParent.getParent();
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if (file.toString().contains(snapshotDir.toString())) {
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String fileName = file.toString().substring(
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snapshotDir.toString().length() + 1);
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Path snapshotFile = new Path(snapshotRoot, fileName);
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return snapshotFile;
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}
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}
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return null;
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}
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/**
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* A class creating directories trees for snapshot testing. For simplicity,
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* the directory tree is a binary tree, i.e., each directory has two children
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* as snapshottable directories.
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*/
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static class TestDirectoryTree {
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/** Height of the directory tree */
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final int height;
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final FileSystem fs;
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/** Top node of the directory tree */
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final Node topNode;
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/** A map recording nodes for each tree level */
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final Map<Integer, ArrayList<Node>> levelMap;
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/**
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* Constructor to build a tree of given {@code height}
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*/
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TestDirectoryTree(int height, FileSystem fs) throws Exception {
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this.height = height;
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this.fs = fs;
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this.topNode = new Node(new Path("/TestSnapshot"), 0,
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null, fs);
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this.levelMap = new HashMap<Integer, ArrayList<Node>>();
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addDirNode(topNode, 0);
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genChildren(topNode, height - 1);
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}
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/**
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* Add a node into the levelMap
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*/
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private void addDirNode(Node node, int atLevel) {
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ArrayList<Node> list = levelMap.get(atLevel);
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if (list == null) {
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list = new ArrayList<Node>();
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levelMap.put(atLevel, list);
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}
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list.add(node);
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}
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/**
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* Recursively generate the tree based on the height.
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*
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* @param parent The parent node
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* @param level The remaining levels to generate
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* @throws Exception
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*/
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void genChildren(Node parent, int level) throws Exception {
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if (level == 0) {
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return;
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}
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parent.leftChild = new Node(new Path(parent.nodePath,
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"leftChild"), height - level, parent, fs);
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parent.rightChild = new Node(new Path(parent.nodePath,
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"rightChild"), height - level, parent, fs);
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addDirNode(parent.leftChild, parent.leftChild.level);
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addDirNode(parent.rightChild, parent.rightChild.level);
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genChildren(parent.leftChild, level - 1);
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genChildren(parent.rightChild, level - 1);
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}
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/**
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* Randomly retrieve a node from the directory tree.
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*
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* @param random A random instance passed by user.
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* @param excludedList Excluded list, i.e., the randomly generated node
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* cannot be one of the nodes in this list.
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* @return a random node from the tree.
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*/
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Node getRandomDirNode(Random random,
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ArrayList<Node> excludedList) {
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while (true) {
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int level = random.nextInt(height);
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ArrayList<Node> levelList = levelMap.get(level);
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int index = random.nextInt(levelList.size());
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Node randomNode = levelList.get(index);
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if (!excludedList.contains(randomNode)) {
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return randomNode;
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}
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}
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}
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/**
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* The class representing a node in {@link TestDirectoryTree}.
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* <br>
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* This contains:
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* <ul>
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* <li>Two children representing the two snapshottable directories</li>
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* <li>A list of files for testing, so that we can check snapshots
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* after file creation/deletion/modification.</li>
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* <li>A list of non-snapshottable directories, to test snapshots with
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* directory creation/deletion. Note that this is needed because the
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* deletion of a snapshottale directory with snapshots is not allowed.</li>
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* </ul>
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*/
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static class Node {
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/** The level of this node in the directory tree */
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final int level;
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/** Children */
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Node leftChild;
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Node rightChild;
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/** Parent node of the node */
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final Node parent;
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/** File path of the node */
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final Path nodePath;
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/**
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* The file path list for testing snapshots before/after file
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* creation/deletion/modification
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*/
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ArrayList<Path> fileList;
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/**
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* Each time for testing snapshots with file creation, since we do not
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* want to insert new files into the fileList, we always create the file
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* that was deleted last time. Thus we record the index for deleted file
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* in the fileList, and roll the file modification forward in the list.
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*/
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int nullFileIndex = 0;
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/**
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* A list of non-snapshottable directories for testing snapshots with
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* directory creation/deletion
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*/
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final ArrayList<Node> nonSnapshotChildren;
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final FileSystem fs;
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Node(Path path, int level, Node parent,
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FileSystem fs) throws Exception {
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this.nodePath = path;
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this.level = level;
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this.parent = parent;
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this.nonSnapshotChildren = new ArrayList<Node>();
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this.fs = fs;
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fs.mkdirs(nodePath);
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}
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/**
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* Create files and add them in the fileList. Initially the last element
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* in the fileList is set to null (where we start file creation).
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*/
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void initFileList(long fileLen, short replication, long seed, int numFiles)
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throws Exception {
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fileList = new ArrayList<Path>(numFiles);
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for (int i = 0; i < numFiles; i++) {
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Path file = new Path(nodePath, "file" + i);
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fileList.add(file);
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if (i < numFiles - 1) {
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DFSTestUtil.createFile(fs, file, fileLen, replication, seed);
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}
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}
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nullFileIndex = numFiles - 1;
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}
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@Override
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public boolean equals(Object o) {
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if (o != null && o instanceof Node) {
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Node node = (Node) o;
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return node.nodePath.equals(nodePath);
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}
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return false;
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}
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@Override
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public int hashCode() {
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return nodePath.hashCode();
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}
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}
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}
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}
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@ -18,6 +18,7 @@
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package org.apache.hadoop.hdfs.server.namenode.snapshot;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertTrue;
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import java.util.ArrayList;
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import java.util.HashMap;
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@ -28,13 +29,16 @@
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import org.apache.hadoop.fs.FSDataOutputStream;
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import org.apache.hadoop.fs.FileStatus;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Options.Rename;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.fs.permission.FsAction;
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import org.apache.hadoop.fs.permission.FsPermission;
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import org.apache.hadoop.hdfs.DFSTestUtil;
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import org.apache.hadoop.hdfs.DistributedFileSystem;
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import org.apache.hadoop.hdfs.MiniDFSCluster;
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import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
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import org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotTestHelper.TestDirectoryTree;
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import org.apache.hadoop.ipc.RemoteException;
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import org.apache.hadoop.util.Time;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Rule;
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@ -50,25 +54,30 @@ public class TestSnapshot {
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protected static final long seed = 0;
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protected static final short REPLICATION = 3;
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protected static final long BLOCKSIZE = 1024;
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public static final int SNAPSHOTNUMBER = 10;
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private final Path dir = new Path("/TestSnapshot");
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private final Path sub1 = new Path(dir, "sub1");
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private final Path subsub1 = new Path(sub1, "subsub1");
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/** The number of times snapshots are created for a snapshottable directory */
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public static final int SNAPSHOT_ITERATION_NUMBER = 20;
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/** Height of directory tree used for testing */
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public static final int DIRECTORY_TREE_LEVEL = 5;
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protected Configuration conf;
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protected MiniDFSCluster cluster;
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protected FSNamesystem fsn;
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protected DistributedFileSystem hdfs;
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private static Random random = new Random(Time.now());
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@Rule
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public ExpectedException exception = ExpectedException.none();
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/**
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* The list recording all previous snapshots. Each element in the array
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* records a snapshot root.
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*/
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protected static ArrayList<Path> snapshotList = new ArrayList<Path>();
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@Rule
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public ExpectedException exception = ExpectedException.none();
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/**
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* Check {@link SnapshotTestHelper.TestDirectoryTree}
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*/
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private TestDirectoryTree dirTree;
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@Before
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public void setUp() throws Exception {
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@ -79,6 +88,7 @@ public void setUp() throws Exception {
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fsn = cluster.getNamesystem();
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hdfs = cluster.getFileSystem();
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dirTree = new TestDirectoryTree(DIRECTORY_TREE_LEVEL, hdfs);
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}
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@After
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@ -94,7 +104,7 @@ public void tearDown() throws Exception {
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*
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* @param modifications Modifications that to be applied to the current dir.
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*/
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public void modifyCurrentDirAndCheckSnapshots(Modification[] modifications)
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private void modifyCurrentDirAndCheckSnapshots(Modification[] modifications)
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throws Exception {
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for (Modification modification : modifications) {
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modification.loadSnapshots();
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@ -104,96 +114,66 @@ public void modifyCurrentDirAndCheckSnapshots(Modification[] modifications)
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}
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/**
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* Generate the snapshot name based on its index.
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* Create two snapshots in each iteration. Each time we will create a snapshot
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* for the top node, then randomly pick a dir in the tree and create
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* snapshot for it.
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*
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* @param snapshotIndex The index of the snapshot
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* @return The snapshot name
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* Finally check the snapshots are created correctly.
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*/
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private String genSnapshotName(int snapshotIndex) {
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return "s" + snapshotIndex;
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protected TestDirectoryTree.Node[] createSnapshots() throws Exception {
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TestDirectoryTree.Node[] nodes = new TestDirectoryTree.Node[2];
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// Each time we will create a snapshot for the top level dir
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Path root = SnapshotTestHelper.createSnapshot(hdfs,
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dirTree.topNode.nodePath, this.genSnapshotName());
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snapshotList.add(root);
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nodes[0] = dirTree.topNode;
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SnapshotTestHelper.checkSnapshotCreation(hdfs, root, nodes[0].nodePath);
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// Then randomly pick one dir from the tree (cannot be the top node) and
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// create snapshot for it
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ArrayList<TestDirectoryTree.Node> excludedList =
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new ArrayList<TestDirectoryTree.Node>();
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excludedList.add(nodes[0]);
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nodes[1] = dirTree.getRandomDirNode(random, excludedList);
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root = SnapshotTestHelper.createSnapshot(hdfs, nodes[1].nodePath,
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this.genSnapshotName());
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snapshotList.add(root);
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SnapshotTestHelper.checkSnapshotCreation(hdfs, root, nodes[1].nodePath);
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return nodes;
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}
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/**
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* Main test, where we will go in the following loop:
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*
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* Create snapshot <----------------------+ -> Check snapshot creation | ->
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* Change the current/live files/dir | -> Check previous snapshots
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* -----------+
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*
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* @param snapshottedDir The dir to be snapshotted
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* @param modificiationsList The list of modifications. Each element in the
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* list is a group of modifications applied to current dir.
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* Create snapshot and check the creation <--+
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* -> Change the current/live files/dir |
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* -> Check previous snapshots -----------------+
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*/
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protected void testSnapshot(Path snapshottedDir,
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ArrayList<Modification[]> modificationsList) throws Exception {
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int snapshotIndex = 0;
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for (Modification[] modifications : modificationsList) {
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// 1. create snapshot
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// TODO: we also need to check creating snapshot for a directory under a
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// snapshottable directory
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Path snapshotRoot = SnapshotTestHelper.createSnapshot(hdfs,
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snapshottedDir, genSnapshotName(snapshotIndex++));
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snapshotList.add(snapshotRoot);
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// 2. Check the basic functionality of the snapshot(s)
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SnapshotTestHelper.checkSnapshotCreation(hdfs, snapshotRoot,
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snapshottedDir);
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// 3. Make changes to the current directory
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for (Modification m : modifications) {
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m.loadSnapshots();
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m.modify();
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m.checkSnapshots();
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}
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}
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}
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/**
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* Prepare a list of modifications. A modification may be a file creation,
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* file deletion, or a modification operation such as appending to an existing
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* file.
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*
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* @param number
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* Number of times that we make modifications to the current
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* directory.
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* @return A list of modifications. Each element in the list is a group of
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* modifications that will be apply to the "current" directory.
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* @throws Exception
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*/
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private ArrayList<Modification[]> prepareModifications(int number)
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throws Exception {
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final Path[] files = new Path[3];
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files[0] = new Path(sub1, "file0");
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files[1] = new Path(sub1, "file1");
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files[2] = new Path(sub1, "file2");
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DFSTestUtil.createFile(hdfs, files[0], BLOCKSIZE, REPLICATION, seed);
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DFSTestUtil.createFile(hdfs, files[1], BLOCKSIZE, REPLICATION, seed);
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ArrayList<Modification[]> mList = new ArrayList<Modification[]>();
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//
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// Modification iterations are as follows:
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// Iteration 0 - delete:file0, append:file1, create:file2
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// Iteration 1 - delete:file1, append:file2, create:file0
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// Iteration 3 - delete:file2, append:file0, create:file1
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// ...
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//
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for (int i = 0; i < number; i++) {
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Modification[] mods = new Modification[3];
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// delete files[i % 3]
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mods[0] = new FileDeletion(files[i % 3], hdfs);
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// modify files[(i+1) % 3]
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mods[1] = new FileAppend(files[(i + 1) % 3], hdfs, (int) BLOCKSIZE);
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// create files[(i+2) % 3]
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mods[2] = new FileCreation(files[(i + 2) % 3], hdfs, (int) BLOCKSIZE);
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mList.add(mods);
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}
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return mList;
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}
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@Test
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public void testSnapshot() throws Exception {
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ArrayList<Modification[]> mList = prepareModifications(SNAPSHOTNUMBER);
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testSnapshot(sub1, mList);
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for (int i = 0; i < SNAPSHOT_ITERATION_NUMBER; i++) {
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// create snapshot and check the creation
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TestDirectoryTree.Node[] ssNodes = createSnapshots();
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// prepare the modifications for the snapshotted dirs
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// we cover the following directories: top, new, and a random
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ArrayList<TestDirectoryTree.Node> excludedList =
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new ArrayList<TestDirectoryTree.Node>();
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TestDirectoryTree.Node[] modNodes =
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new TestDirectoryTree.Node[ssNodes.length + 1];
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for (int n = 0; n < ssNodes.length; n++) {
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modNodes[n] = ssNodes[n];
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excludedList.add(ssNodes[n]);
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}
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modNodes[modNodes.length - 1] = dirTree.getRandomDirNode(random,
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excludedList);
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Modification[] mods = prepareModifications(modNodes);
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// make changes to the current directory
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modifyCurrentDirAndCheckSnapshots(mods);
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}
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}
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/**
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* Creating snapshots for a directory that is not snapshottable must fail.
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*
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@ -202,114 +182,110 @@ public void testSnapshot() throws Exception {
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*/
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@Test
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public void testSnapshottableDirectory() throws Exception {
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Path file0 = new Path(sub1, "file0");
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Path file1 = new Path(sub1, "file1");
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Path dir = new Path("/TestSnapshot/sub");
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Path file0 = new Path(dir, "file0");
|
||||
Path file1 = new Path(dir, "file1");
|
||||
DFSTestUtil.createFile(hdfs, file0, BLOCKSIZE, REPLICATION, seed);
|
||||
DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
exception.expect(RemoteException.class);
|
||||
hdfs.createSnapshot("s1", sub1.toString());
|
||||
exception.expectMessage("Directory is not a snapshottable directory: "
|
||||
+ dir.toString());
|
||||
hdfs.createSnapshot("s1", dir.toString());
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Deleting snapshottable directory with snapshots must fail.
|
||||
* Prepare a list of modifications. A modification may be a file creation,
|
||||
* file deletion, or a modification operation such as appending to an existing
|
||||
* file.
|
||||
*/
|
||||
@Test
|
||||
public void testDeleteDirectoryWithSnapshot() throws Exception {
|
||||
Path file0 = new Path(sub1, "file0");
|
||||
Path file1 = new Path(sub1, "file1");
|
||||
DFSTestUtil.createFile(hdfs, file0, BLOCKSIZE, REPLICATION, seed);
|
||||
DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
// Allow snapshot for sub1, and create snapshot for it
|
||||
hdfs.allowSnapshot(sub1.toString());
|
||||
hdfs.createSnapshot("s1", sub1.toString());
|
||||
|
||||
// Deleting a snapshottable dir with snapshots should fail
|
||||
exception.expect(RemoteException.class);
|
||||
hdfs.delete(sub1, true);
|
||||
private Modification[] prepareModifications(TestDirectoryTree.Node[] nodes)
|
||||
throws Exception {
|
||||
ArrayList<Modification> mList = new ArrayList<Modification>();
|
||||
for (TestDirectoryTree.Node node : nodes) {
|
||||
// If the node does not have files in it, create files
|
||||
if (node.fileList == null) {
|
||||
node.initFileList(BLOCKSIZE, REPLICATION, seed, 6);
|
||||
}
|
||||
|
||||
//
|
||||
// Modification iterations are as follows:
|
||||
// Iteration 0 - create:fileList[5], delete:fileList[0],
|
||||
// append:fileList[1], chmod:fileList[2],
|
||||
// chown:fileList[3], change_replication:fileList[4].
|
||||
// Set nullFileIndex to 0
|
||||
//
|
||||
// Iteration 1 - create:fileList[0], delete:fileList[1],
|
||||
// append:fileList[2], chmod:fileList[3],
|
||||
// chown:fileList[4], change_replication:fileList[5]
|
||||
// Set nullFileIndex to 1
|
||||
//
|
||||
// Iteration 2 - create:fileList[1], delete:fileList[2],
|
||||
// append:fileList[3], chmod:fileList[4],
|
||||
// chown:fileList[5], change_replication:fileList[6]
|
||||
// Set nullFileIndex to 2
|
||||
// ...
|
||||
//
|
||||
Modification create = new FileCreation(
|
||||
node.fileList.get(node.nullFileIndex), hdfs, (int) BLOCKSIZE);
|
||||
Modification delete = new FileDeletion(
|
||||
node.fileList.get((node.nullFileIndex + 1) % node.fileList.size()),
|
||||
hdfs);
|
||||
Modification append = new FileAppend(
|
||||
node.fileList.get((node.nullFileIndex + 2) % node.fileList.size()),
|
||||
hdfs, (int) BLOCKSIZE);
|
||||
Modification chmod = new FileChangePermission(
|
||||
node.fileList.get((node.nullFileIndex + 3) % node.fileList.size()),
|
||||
hdfs, genRandomPermission());
|
||||
String[] userGroup = genRandomOwner();
|
||||
Modification chown = new FileChown(
|
||||
node.fileList.get((node.nullFileIndex + 4) % node.fileList.size()),
|
||||
hdfs, userGroup[0], userGroup[1]);
|
||||
Modification replication = new FileChangeReplication(
|
||||
node.fileList.get((node.nullFileIndex + 5) % node.fileList.size()),
|
||||
hdfs, (short) (random.nextInt(REPLICATION) + 1));
|
||||
node.nullFileIndex = (node.nullFileIndex + 1) % node.fileList.size();
|
||||
Modification dirChange = new DirCreationOrDeletion(node.nodePath, hdfs,
|
||||
node, random.nextBoolean());
|
||||
|
||||
mList.add(create);
|
||||
mList.add(delete);
|
||||
mList.add(append);
|
||||
mList.add(chmod);
|
||||
mList.add(chown);
|
||||
mList.add(replication);
|
||||
mList.add(dirChange);
|
||||
}
|
||||
return mList.toArray(new Modification[0]);
|
||||
}
|
||||
|
||||
/**
|
||||
* Deleting directory with snapshottable descendant with snapshots must fail.
|
||||
* @return A random FsPermission
|
||||
*/
|
||||
@Test
|
||||
public void testDeleteDirectoryWithSnapshot2() throws Exception {
|
||||
Path file0 = new Path(sub1, "file0");
|
||||
Path file1 = new Path(sub1, "file1");
|
||||
DFSTestUtil.createFile(hdfs, file0, BLOCKSIZE, REPLICATION, seed);
|
||||
DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
Path subfile1 = new Path(subsub1, "file0");
|
||||
Path subfile2 = new Path(subsub1, "file1");
|
||||
DFSTestUtil.createFile(hdfs, subfile1, BLOCKSIZE, REPLICATION, seed);
|
||||
DFSTestUtil.createFile(hdfs, subfile2, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
// Allow snapshot for subsub1, and create snapshot for it
|
||||
hdfs.allowSnapshot(subsub1.toString());
|
||||
hdfs.createSnapshot("s1", subsub1.toString());
|
||||
|
||||
// Deleting dir while its descedant subsub1 having snapshots should fail
|
||||
exception.expect(RemoteException.class);
|
||||
hdfs.delete(dir, true);
|
||||
}
|
||||
|
||||
/**
|
||||
* Renaming a directory to another directory with snapshots must fail.
|
||||
*/
|
||||
@Test
|
||||
public void testRenameToDirectoryWithSnapshot() throws Exception {
|
||||
// create the directory sub1
|
||||
hdfs.mkdirs(sub1);
|
||||
|
||||
Path sub2 = new Path(dir, "sub2");
|
||||
Path file2 = new Path(sub2, "file");
|
||||
DFSTestUtil.createFile(hdfs, file2, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
// The normal rename should succeed
|
||||
hdfs.rename(sub2, sub1, Rename.OVERWRITE);
|
||||
|
||||
// Create sub3 and create snapshot for it
|
||||
Path sub3 = new Path(dir, "sub3");
|
||||
hdfs.mkdirs(sub3);
|
||||
SnapshotTestHelper.createSnapshot(hdfs, sub3, "s1");
|
||||
|
||||
exception.expect(RemoteException.class);
|
||||
String error = "The direcotry " + sub3.toString()
|
||||
+ " cannot be deleted for renaming since " + sub3.toString()
|
||||
+ " is snapshottable and already has snapshots";
|
||||
exception.expectMessage(error);
|
||||
hdfs.rename(sub1, sub3, Rename.OVERWRITE);
|
||||
private FsPermission genRandomPermission() {
|
||||
// randomly select between "rwx" and "rw-"
|
||||
FsAction u = random.nextBoolean() ? FsAction.ALL : FsAction.READ_WRITE;
|
||||
FsAction g = random.nextBoolean() ? FsAction.ALL : FsAction.READ_WRITE;
|
||||
FsAction o = random.nextBoolean() ? FsAction.ALL : FsAction.READ_WRITE;
|
||||
return new FsPermission(u, g, o);
|
||||
}
|
||||
|
||||
/**
|
||||
* Renaming a directory to another directory with snapshots
|
||||
* must fail.
|
||||
* @return A string array containing two string: the first string indicates
|
||||
* the owner, and the other indicates the group
|
||||
*/
|
||||
@Test
|
||||
public void testRenameToDirectoryWithSnapshot2() throws Exception {
|
||||
Path file0 = new Path(sub1, "file0");
|
||||
Path file1 = new Path(sub1, "file1");
|
||||
DFSTestUtil.createFile(hdfs, file0, BLOCKSIZE, REPLICATION, seed);
|
||||
DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
Path sub2 = new Path(dir, "sub2");
|
||||
Path file2 = new Path(sub2, "file");
|
||||
DFSTestUtil.createFile(hdfs, file2, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
// Create snapshot for sub1
|
||||
SnapshotTestHelper.createSnapshot(hdfs, sub1, "s1");
|
||||
// Then delete file0 and file1 so that the renaming can succeed if without
|
||||
// snapshots
|
||||
hdfs.delete(file0, true);
|
||||
hdfs.delete(file1, true);
|
||||
|
||||
exception.expect(RemoteException.class);
|
||||
String error = "The direcotry " + sub1.toString()
|
||||
+ " cannot be deleted for renaming since " + sub1.toString()
|
||||
+ " is snapshottable and already has snapshots";
|
||||
exception.expectMessage(error);
|
||||
hdfs.rename(sub2, sub1, Rename.OVERWRITE);
|
||||
private String[] genRandomOwner() {
|
||||
// TODO
|
||||
String[] userGroup = new String[]{"dr.who", "unknown"};
|
||||
return userGroup;
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate a random snapshot name.
|
||||
* @return The snapshot name
|
||||
*/
|
||||
private String genSnapshotName() {
|
||||
return "s" + Math.abs(random.nextLong());
|
||||
}
|
||||
|
||||
/**
|
||||
@ -325,13 +301,11 @@ static abstract class Modification {
|
||||
protected final Path file;
|
||||
protected final FileSystem fs;
|
||||
final String type;
|
||||
protected final Random random;
|
||||
|
||||
Modification(Path file, FileSystem fs, String type) {
|
||||
this.file = file;
|
||||
this.fs = fs;
|
||||
this.type = type;
|
||||
this.random = new Random();
|
||||
}
|
||||
|
||||
abstract void loadSnapshots() throws Exception;
|
||||
@ -341,6 +315,104 @@ static abstract class Modification {
|
||||
abstract void checkSnapshots() throws Exception;
|
||||
}
|
||||
|
||||
/**
|
||||
* Modifications that change the file status. We check the FileStatus of
|
||||
* snapshot files before/after the modification.
|
||||
*/
|
||||
static abstract class FileStatusChange extends Modification {
|
||||
protected final HashMap<Path, FileStatus> statusMap;
|
||||
|
||||
FileStatusChange(Path file, FileSystem fs, String type) {
|
||||
super(file, fs, type);
|
||||
statusMap = new HashMap<Path, FileStatus>();
|
||||
}
|
||||
|
||||
@Override
|
||||
void loadSnapshots() throws Exception {
|
||||
for (Path snapshotRoot : snapshotList) {
|
||||
Path snapshotFile = SnapshotTestHelper.getSnapshotFile(fs,
|
||||
snapshotRoot, file);
|
||||
if (snapshotFile != null) {
|
||||
if (fs.exists(snapshotFile)) {
|
||||
FileStatus status = fs.getFileStatus(snapshotFile);
|
||||
statusMap.put(snapshotFile, status);
|
||||
} else {
|
||||
statusMap.put(snapshotFile, null);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
void checkSnapshots() throws Exception {
|
||||
for (Path snapshotFile : statusMap.keySet()) {
|
||||
FileStatus currentStatus = fs.exists(snapshotFile) ? fs
|
||||
.getFileStatus(snapshotFile) : null;
|
||||
FileStatus originalStatus = statusMap.get(snapshotFile);
|
||||
assertEquals(currentStatus, originalStatus);
|
||||
if (currentStatus != null) {
|
||||
assertEquals(currentStatus.toString(), originalStatus.toString());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Change the file permission
|
||||
*/
|
||||
static class FileChangePermission extends FileStatusChange {
|
||||
private final FsPermission newPermission;
|
||||
|
||||
FileChangePermission(Path file, FileSystem fs, FsPermission newPermission) {
|
||||
super(file, fs, "chmod");
|
||||
this.newPermission = newPermission;
|
||||
}
|
||||
|
||||
@Override
|
||||
void modify() throws Exception {
|
||||
assertTrue(fs.exists(file));
|
||||
fs.setPermission(file, newPermission);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Change the replication factor of file
|
||||
*/
|
||||
static class FileChangeReplication extends FileStatusChange {
|
||||
private final short newReplication;
|
||||
|
||||
FileChangeReplication(Path file, FileSystem fs, short replication) {
|
||||
super(file, fs, "replication");
|
||||
this.newReplication = replication;
|
||||
}
|
||||
|
||||
@Override
|
||||
void modify() throws Exception {
|
||||
assertTrue(fs.exists(file));
|
||||
fs.setReplication(file, newReplication);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Change the owner:group of a file
|
||||
*/
|
||||
static class FileChown extends FileStatusChange {
|
||||
private final String newUser;
|
||||
private final String newGroup;
|
||||
|
||||
FileChown(Path file, FileSystem fs, String user, String group) {
|
||||
super(file, fs, "chown");
|
||||
this.newUser = user;
|
||||
this.newGroup = group;
|
||||
}
|
||||
|
||||
@Override
|
||||
void modify() throws Exception {
|
||||
assertTrue(fs.exists(file));
|
||||
fs.setOwner(file, newUser, newGroup);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Appending a specified length to an existing file
|
||||
*/
|
||||
@ -348,9 +420,8 @@ static class FileAppend extends Modification {
|
||||
final int appendLen;
|
||||
private final HashMap<Path, Long> snapshotFileLengthMap;
|
||||
|
||||
FileAppend(Path file, FileSystem fs, int len) throws Exception {
|
||||
FileAppend(Path file, FileSystem fs, int len) {
|
||||
super(file, fs, "append");
|
||||
assert len >= 0;
|
||||
this.appendLen = len;
|
||||
this.snapshotFileLengthMap = new HashMap<Path, Long>();
|
||||
}
|
||||
@ -358,19 +429,19 @@ static class FileAppend extends Modification {
|
||||
@Override
|
||||
void loadSnapshots() throws Exception {
|
||||
for (Path snapshotRoot : snapshotList) {
|
||||
Path snapshotFile = new Path(snapshotRoot, file.getName());
|
||||
if (fs.exists(snapshotFile)) {
|
||||
long snapshotFileLen = fs.getFileStatus(snapshotFile).getLen();
|
||||
Path snapshotFile = SnapshotTestHelper.getSnapshotFile(fs,
|
||||
snapshotRoot, file);
|
||||
if (snapshotFile != null) {
|
||||
long snapshotFileLen = fs.exists(snapshotFile) ? fs.getFileStatus(
|
||||
snapshotFile).getLen() : -1L;
|
||||
snapshotFileLengthMap.put(snapshotFile, snapshotFileLen);
|
||||
} else {
|
||||
snapshotFileLengthMap.put(snapshotFile, -1L);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
void modify() throws Exception {
|
||||
assert fs.exists(file);
|
||||
assertTrue(fs.exists(file));
|
||||
FSDataOutputStream out = fs.append(file);
|
||||
byte[] buffer = new byte[appendLen];
|
||||
random.nextBytes(buffer);
|
||||
@ -381,16 +452,13 @@ void modify() throws Exception {
|
||||
@Override
|
||||
void checkSnapshots() throws Exception {
|
||||
byte[] buffer = new byte[32];
|
||||
for (Path snapshotRoot : snapshotList) {
|
||||
Path snapshotFile = new Path(snapshotRoot, file.getName());
|
||||
long currentSnapshotFileLen = -1L;
|
||||
if (fs.exists(snapshotFile)) {
|
||||
currentSnapshotFileLen = fs.getFileStatus(snapshotFile).getLen();
|
||||
}
|
||||
for (Path snapshotFile : snapshotFileLengthMap.keySet()) {
|
||||
long currentSnapshotFileLen = fs.exists(snapshotFile) ? fs
|
||||
.getFileStatus(snapshotFile).getLen() : -1L;
|
||||
long originalSnapshotFileLen = snapshotFileLengthMap.get(snapshotFile);
|
||||
assertEquals(currentSnapshotFileLen, originalSnapshotFileLen);
|
||||
// Read the snapshot file out of the boundary
|
||||
if (fs.exists(snapshotFile)) {
|
||||
if (currentSnapshotFileLen != -1L) {
|
||||
FSDataInputStream input = fs.open(snapshotFile);
|
||||
int readLen = input.read(currentSnapshotFileLen, buffer, 0, 1);
|
||||
assertEquals(readLen, -1);
|
||||
@ -416,12 +484,12 @@ static class FileCreation extends Modification {
|
||||
@Override
|
||||
void loadSnapshots() throws Exception {
|
||||
for (Path snapshotRoot : snapshotList) {
|
||||
Path snapshotFile = new Path(snapshotRoot, file.getName());
|
||||
boolean exist = fs.exists(snapshotFile);
|
||||
if (exist) {
|
||||
fileStatusMap.put(snapshotFile, fs.getFileStatus(snapshotFile));
|
||||
} else {
|
||||
fileStatusMap.put(snapshotFile, null);
|
||||
Path snapshotFile = SnapshotTestHelper.getSnapshotFile(fs,
|
||||
snapshotRoot, file);
|
||||
if (snapshotFile != null) {
|
||||
FileStatus status =
|
||||
fs.exists(snapshotFile) ? fs.getFileStatus(snapshotFile) : null;
|
||||
fileStatusMap.put(snapshotFile, status);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -435,19 +503,26 @@ void modify() throws Exception {
|
||||
@Override
|
||||
void checkSnapshots() throws Exception {
|
||||
for (Path snapshotRoot : snapshotList) {
|
||||
Path snapshotFile = new Path(snapshotRoot, file.getName());
|
||||
boolean currentSnapshotFileExist = fs.exists(snapshotFile);
|
||||
boolean originalSnapshotFileExist = !(fileStatusMap.get(snapshotFile) == null);
|
||||
assertEquals(currentSnapshotFileExist, originalSnapshotFileExist);
|
||||
if (currentSnapshotFileExist) {
|
||||
FileStatus currentSnapshotStatus = fs.getFileStatus(snapshotFile);
|
||||
FileStatus originalStatus = fileStatusMap.get(snapshotFile);
|
||||
assertEquals(currentSnapshotStatus, originalStatus);
|
||||
Path snapshotFile = SnapshotTestHelper.getSnapshotFile(fs,
|
||||
snapshotRoot, file);
|
||||
if (snapshotFile != null) {
|
||||
boolean currentSnapshotFileExist = fs.exists(snapshotFile);
|
||||
boolean originalSnapshotFileExist =
|
||||
fileStatusMap.get(snapshotFile) != null;
|
||||
assertEquals(currentSnapshotFileExist, originalSnapshotFileExist);
|
||||
if (currentSnapshotFileExist) {
|
||||
FileStatus currentSnapshotStatus = fs.getFileStatus(snapshotFile);
|
||||
FileStatus originalStatus = fileStatusMap.get(snapshotFile);
|
||||
// We compare the string because it contains all the information,
|
||||
// while FileStatus#equals only compares the path
|
||||
assertEquals(currentSnapshotStatus.toString(),
|
||||
originalStatus.toString());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* File deletion
|
||||
*/
|
||||
@ -462,9 +537,9 @@ static class FileDeletion extends Modification {
|
||||
@Override
|
||||
void loadSnapshots() throws Exception {
|
||||
for (Path snapshotRoot : snapshotList) {
|
||||
Path snapshotFile = new Path(snapshotRoot, file.getName());
|
||||
boolean existence = fs.exists(snapshotFile);
|
||||
snapshotFileExistenceMap.put(snapshotFile, existence);
|
||||
boolean existence = SnapshotTestHelper.getSnapshotFile(fs,
|
||||
snapshotRoot, file) != null;
|
||||
snapshotFileExistenceMap.put(snapshotRoot, existence);
|
||||
}
|
||||
}
|
||||
|
||||
@ -476,12 +551,91 @@ void modify() throws Exception {
|
||||
@Override
|
||||
void checkSnapshots() throws Exception {
|
||||
for (Path snapshotRoot : snapshotList) {
|
||||
Path snapshotFile = new Path(snapshotRoot, file.getName());
|
||||
boolean currentSnapshotFileExist = fs.exists(snapshotFile);
|
||||
boolean currentSnapshotFileExist = SnapshotTestHelper.getSnapshotFile(
|
||||
fs, snapshotRoot, file) != null;
|
||||
boolean originalSnapshotFileExist = snapshotFileExistenceMap
|
||||
.get(snapshotFile);
|
||||
.get(snapshotRoot);
|
||||
assertEquals(currentSnapshotFileExist, originalSnapshotFileExist);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Directory creation or deletion.
|
||||
*/
|
||||
static class DirCreationOrDeletion extends Modification {
|
||||
private final TestDirectoryTree.Node node;
|
||||
private final boolean isCreation;
|
||||
private final Path changedPath;
|
||||
private final HashMap<Path, FileStatus> statusMap;
|
||||
|
||||
DirCreationOrDeletion(Path file, FileSystem fs, TestDirectoryTree.Node node,
|
||||
boolean isCreation) {
|
||||
super(file, fs, "dircreation");
|
||||
this.node = node;
|
||||
// If the node's nonSnapshotChildren is empty, we still need to create
|
||||
// sub-directories
|
||||
this.isCreation = isCreation || node.nonSnapshotChildren.isEmpty();
|
||||
if (this.isCreation) {
|
||||
// Generate the path for the dir to be created
|
||||
changedPath = new Path(node.nodePath, "sub"
|
||||
+ node.nonSnapshotChildren.size());
|
||||
} else {
|
||||
// If deletion, we delete the current last dir in nonSnapshotChildren
|
||||
changedPath = node.nonSnapshotChildren.get(node.nonSnapshotChildren
|
||||
.size() - 1).nodePath;
|
||||
}
|
||||
this.statusMap = new HashMap<Path, FileStatus>();
|
||||
}
|
||||
|
||||
@Override
|
||||
void loadSnapshots() throws Exception {
|
||||
for (Path snapshotRoot : snapshotList) {
|
||||
Path snapshotDir = SnapshotTestHelper.getSnapshotFile(fs, snapshotRoot,
|
||||
changedPath);
|
||||
if (snapshotDir != null) {
|
||||
FileStatus status = fs.exists(snapshotDir) ? fs
|
||||
.getFileStatus(snapshotDir) : null;
|
||||
statusMap.put(snapshotDir, status);
|
||||
// In each non-snapshottable directory, we also create a file. Thus
|
||||
// here we also need to check the file's status before/after taking
|
||||
// snapshots
|
||||
Path snapshotFile = new Path(snapshotDir, "file0");
|
||||
status = fs.exists(snapshotFile) ? fs.getFileStatus(snapshotFile)
|
||||
: null;
|
||||
statusMap.put(snapshotFile, status);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
void modify() throws Exception {
|
||||
if (isCreation) {
|
||||
// creation
|
||||
TestDirectoryTree.Node newChild = new TestDirectoryTree.Node(
|
||||
changedPath, node.level + 1, node, node.fs);
|
||||
// create file under the new non-snapshottable directory
|
||||
newChild.initFileList(BLOCKSIZE, REPLICATION, seed, 2);
|
||||
node.nonSnapshotChildren.add(newChild);
|
||||
} else {
|
||||
// deletion
|
||||
TestDirectoryTree.Node childToDelete = node.nonSnapshotChildren
|
||||
.remove(node.nonSnapshotChildren.size() - 1);
|
||||
node.fs.delete(childToDelete.nodePath, true);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
void checkSnapshots() throws Exception {
|
||||
for (Path snapshot : statusMap.keySet()) {
|
||||
FileStatus currentStatus = fs.exists(snapshot) ? fs
|
||||
.getFileStatus(snapshot) : null;
|
||||
FileStatus originalStatus = statusMap.get(snapshot);
|
||||
assertEquals(currentStatus, originalStatus);
|
||||
if (currentStatus != null) {
|
||||
assertEquals(currentStatus.toString(), originalStatus.toString());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -0,0 +1,122 @@
|
||||
/**
|
||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package org.apache.hadoop.hdfs.server.namenode.snapshot;
|
||||
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.hdfs.DFSTestUtil;
|
||||
import org.apache.hadoop.hdfs.DistributedFileSystem;
|
||||
import org.apache.hadoop.hdfs.MiniDFSCluster;
|
||||
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
|
||||
import org.apache.hadoop.ipc.RemoteException;
|
||||
import org.junit.After;
|
||||
import org.junit.Before;
|
||||
import org.junit.Rule;
|
||||
import org.junit.Test;
|
||||
import org.junit.rules.ExpectedException;
|
||||
|
||||
/**
|
||||
* Tests snapshot deletion.
|
||||
*/
|
||||
public class TestSnapshotDeletion {
|
||||
protected static final long seed = 0;
|
||||
protected static final short REPLICATION = 3;
|
||||
protected static final long BLOCKSIZE = 1024;
|
||||
public static final int SNAPSHOTNUMBER = 10;
|
||||
|
||||
private final Path dir = new Path("/TestSnapshot");
|
||||
private final Path sub1 = new Path(dir, "sub1");
|
||||
private final Path subsub1 = new Path(sub1, "subsub1");
|
||||
|
||||
protected Configuration conf;
|
||||
protected MiniDFSCluster cluster;
|
||||
protected FSNamesystem fsn;
|
||||
protected DistributedFileSystem hdfs;
|
||||
|
||||
@Rule
|
||||
public ExpectedException exception = ExpectedException.none();
|
||||
|
||||
@Before
|
||||
public void setUp() throws Exception {
|
||||
conf = new Configuration();
|
||||
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION)
|
||||
.build();
|
||||
cluster.waitActive();
|
||||
|
||||
fsn = cluster.getNamesystem();
|
||||
hdfs = cluster.getFileSystem();
|
||||
}
|
||||
|
||||
@After
|
||||
public void tearDown() throws Exception {
|
||||
if (cluster != null) {
|
||||
cluster.shutdown();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Deleting snapshottable directory with snapshots must fail.
|
||||
*/
|
||||
@Test
|
||||
public void testDeleteDirectoryWithSnapshot() throws Exception {
|
||||
Path file0 = new Path(sub1, "file0");
|
||||
Path file1 = new Path(sub1, "file1");
|
||||
DFSTestUtil.createFile(hdfs, file0, BLOCKSIZE, REPLICATION, seed);
|
||||
DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
// Allow snapshot for sub1, and create snapshot for it
|
||||
hdfs.allowSnapshot(sub1.toString());
|
||||
hdfs.createSnapshot("s1", sub1.toString());
|
||||
|
||||
// Deleting a snapshottable dir with snapshots should fail
|
||||
exception.expect(RemoteException.class);
|
||||
String error = "The direcotry " + sub1.toString()
|
||||
+ " cannot be deleted since " + sub1.toString()
|
||||
+ " is snapshottable and already has snapshots";
|
||||
exception.expectMessage(error);
|
||||
hdfs.delete(sub1, true);
|
||||
}
|
||||
|
||||
/**
|
||||
* Deleting directory with snapshottable descendant with snapshots must fail.
|
||||
*/
|
||||
@Test
|
||||
public void testDeleteDirectoryWithSnapshot2() throws Exception {
|
||||
Path file0 = new Path(sub1, "file0");
|
||||
Path file1 = new Path(sub1, "file1");
|
||||
DFSTestUtil.createFile(hdfs, file0, BLOCKSIZE, REPLICATION, seed);
|
||||
DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
Path subfile1 = new Path(subsub1, "file0");
|
||||
Path subfile2 = new Path(subsub1, "file1");
|
||||
DFSTestUtil.createFile(hdfs, subfile1, BLOCKSIZE, REPLICATION, seed);
|
||||
DFSTestUtil.createFile(hdfs, subfile2, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
// Allow snapshot for subsub1, and create snapshot for it
|
||||
hdfs.allowSnapshot(subsub1.toString());
|
||||
hdfs.createSnapshot("s1", subsub1.toString());
|
||||
|
||||
// Deleting dir while its descedant subsub1 having snapshots should fail
|
||||
exception.expect(RemoteException.class);
|
||||
String error = "The direcotry " + dir.toString()
|
||||
+ " cannot be deleted since " + subsub1.toString()
|
||||
+ " is snapshottable and already has snapshots";
|
||||
exception.expectMessage(error);
|
||||
hdfs.delete(dir, true);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user