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HDFS-6908. Incorrect snapshot directory diff generated by snapshot deletion. Contributed by Juan Yu and Jing Zhao.

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This commit is contained in:
Jing Zhao 2014-08-27 10:26:22 -07:00
parent e2d0ff364a
commit 6b441d227a
3 changed files with 85 additions and 5 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -642,6 +642,9 @@ Release 2.6.0 - UNRELEASED
HDFS-4852. libhdfs documentation is out of date. (cnauroth)
HDFS-6908. Incorrect snapshot directory diff generated by snapshot deletion.
(Juan Yu and jing9 via jing9)
Release 2.5.1 - UNRELEASED
INCOMPATIBLE CHANGES

6
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/DirectoryWithSnapshotFeature.java
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@ -722,6 +722,8 @@ public Quota.Counts cleanDirectory(final INodeDirectory currentINode,
counts.add(lastDiff.diff.destroyCreatedList(currentINode,
collectedBlocks, removedINodes));
}
counts.add(currentINode.cleanSubtreeRecursively(snapshot, prior,
collectedBlocks, removedINodes, priorDeleted, countDiffChange));
} else {
// update prior
prior = getDiffs().updatePrior(snapshot, prior);
@ -739,6 +741,8 @@ public Quota.Counts cleanDirectory(final INodeDirectory currentINode,
counts.add(getDiffs().deleteSnapshotDiff(snapshot, prior,
currentINode, collectedBlocks, removedINodes, countDiffChange));
counts.add(currentINode.cleanSubtreeRecursively(snapshot, prior,
collectedBlocks, removedINodes, priorDeleted, countDiffChange));
// check priorDiff again since it may be created during the diff deletion
if (prior != Snapshot.NO_SNAPSHOT_ID) {
@ -778,8 +782,6 @@ public Quota.Counts cleanDirectory(final INodeDirectory currentINode,
}
}
}
counts.add(currentINode.cleanSubtreeRecursively(snapshot, prior,
collectedBlocks, removedINodes, priorDeleted, countDiffChange));
if (currentINode.isQuotaSet()) {
currentINode.getDirectoryWithQuotaFeature().addSpaceConsumed2Cache(

75
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotDeletion.java
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@ -19,6 +19,7 @@
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
@ -559,6 +560,80 @@ public void testDeleteEarliestSnapshot2() throws Exception {
}
}
/**
* Delete a snapshot that is taken before a directory deletion,
* directory diff list should be combined correctly.
*/
@Test (timeout=60000)
public void testDeleteSnapshot1() throws Exception {
final Path root = new Path("/");
Path dir = new Path("/dir1");
Path file1 = new Path(dir, "file1");
DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPLICATION, seed);
hdfs.allowSnapshot(root);
hdfs.createSnapshot(root, "s1");
Path file2 = new Path(dir, "file2");
DFSTestUtil.createFile(hdfs, file2, BLOCKSIZE, REPLICATION, seed);
hdfs.createSnapshot(root, "s2");
// delete file
hdfs.delete(file1, true);
hdfs.delete(file2, true);
// delete directory
assertTrue(hdfs.delete(dir, false));
// delete second snapshot
hdfs.deleteSnapshot(root, "s2");
NameNodeAdapter.enterSafeMode(cluster.getNameNode(), false);
NameNodeAdapter.saveNamespace(cluster.getNameNode());
// restart NN
cluster.restartNameNodes();
}
/**
* Delete a snapshot that is taken before a directory deletion (recursively),
* directory diff list should be combined correctly.
*/
@Test (timeout=60000)
public void testDeleteSnapshot2() throws Exception {
final Path root = new Path("/");
Path dir = new Path("/dir1");
Path file1 = new Path(dir, "file1");
DFSTestUtil.createFile(hdfs, file1, BLOCKSIZE, REPLICATION, seed);
hdfs.allowSnapshot(root);
hdfs.createSnapshot(root, "s1");
Path file2 = new Path(dir, "file2");
DFSTestUtil.createFile(hdfs, file2, BLOCKSIZE, REPLICATION, seed);
INodeFile file2Node = fsdir.getINode(file2.toString()).asFile();
long file2NodeId = file2Node.getId();
hdfs.createSnapshot(root, "s2");
// delete directory recursively
assertTrue(hdfs.delete(dir, true));
assertNotNull(fsdir.getInode(file2NodeId));
// delete second snapshot
hdfs.deleteSnapshot(root, "s2");
assertTrue(fsdir.getInode(file2NodeId) == null);
NameNodeAdapter.enterSafeMode(cluster.getNameNode(), false);
NameNodeAdapter.saveNamespace(cluster.getNameNode());
// restart NN
cluster.restartNameNodes();
}
/**
* Test deleting snapshots in a more complicated scenario: need to combine
* snapshot diffs, but no need to handle diffs distributed in a dir tree