HDFS-15820. Ensure snapshot root trash provisioning happens only post safe mode exit (#2682)
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bshashikant
GitHub
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c4918fb298
commit
19ae0faacc
@ -425,7 +425,7 @@ boolean leaveSafeMode(boolean force) {
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BlockManagerSafeMode.STEP_AWAITING_REPORTED_BLOCKS);
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prog.endPhase(Phase.SAFEMODE);
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}
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namesystem.checkAndProvisionSnapshotTrashRoots();
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return true;
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}
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@ -124,7 +124,8 @@
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import org.apache.hadoop.hdfs.server.namenode.metrics.ReplicatedBlocksMBean;
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import org.apache.hadoop.hdfs.server.protocol.SlowDiskReports;
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import org.apache.hadoop.ipc.ObserverRetryOnActiveException;
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import org.apache.hadoop.util.Time;
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import org.apache.hadoop.util.*;
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import static org.apache.hadoop.util.Time.now;
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import static org.apache.hadoop.util.Time.monotonicNow;
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import static org.apache.hadoop.hdfs.server.namenode.top.metrics.TopMetrics.TOPMETRICS_METRICS_SOURCE_NAME;
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@ -329,11 +330,6 @@
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import org.apache.hadoop.security.token.Token;
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import org.apache.hadoop.security.token.TokenIdentifier;
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import org.apache.hadoop.security.token.delegation.DelegationKey;
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import org.apache.hadoop.util.Daemon;
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import org.apache.hadoop.util.DataChecksum;
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import org.apache.hadoop.util.ReflectionUtils;
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import org.apache.hadoop.util.StringUtils;
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import org.apache.hadoop.util.VersionInfo;
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import org.apache.log4j.Logger;
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import org.apache.log4j.Appender;
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import org.apache.log4j.AsyncAppender;
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@ -8531,25 +8527,37 @@ void checkAccess(String src, FsAction mode) throws IOException {
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* Check if snapshot roots are created for all existing snapshottable
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* directories. Create them if not.
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*/
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void checkAndProvisionSnapshotTrashRoots() throws IOException {
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SnapshottableDirectoryStatus[] dirStatusList = getSnapshottableDirListing();
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if (dirStatusList == null) {
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return;
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}
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for (SnapshottableDirectoryStatus dirStatus : dirStatusList) {
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String currDir = dirStatus.getFullPath().toString();
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if (!currDir.endsWith(Path.SEPARATOR)) {
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currDir += Path.SEPARATOR;
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}
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String trashPath = currDir + FileSystem.TRASH_PREFIX;
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HdfsFileStatus fileStatus = getFileInfo(trashPath, false, false, false);
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if (fileStatus == null) {
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LOG.info("Trash doesn't exist for snapshottable directory {}. "
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+ "Creating trash at {}", currDir, trashPath);
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PermissionStatus permissionStatus = new PermissionStatus(getRemoteUser()
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.getShortUserName(), null, SHARED_TRASH_PERMISSION);
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mkdirs(trashPath, permissionStatus, false);
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@Override
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public void checkAndProvisionSnapshotTrashRoots() {
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if (isSnapshotTrashRootEnabled) {
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try {
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SnapshottableDirectoryStatus[] dirStatusList =
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getSnapshottableDirListing();
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if (dirStatusList == null) {
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return;
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}
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for (SnapshottableDirectoryStatus dirStatus : dirStatusList) {
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String currDir = dirStatus.getFullPath().toString();
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if (!currDir.endsWith(Path.SEPARATOR)) {
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currDir += Path.SEPARATOR;
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}
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String trashPath = currDir + FileSystem.TRASH_PREFIX;
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HdfsFileStatus fileStatus = getFileInfo(trashPath, false, false, false);
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if (fileStatus == null) {
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LOG.info("Trash doesn't exist for snapshottable directory {}. " + "Creating trash at {}", currDir, trashPath);
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PermissionStatus permissionStatus =
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new PermissionStatus(getRemoteUser().getShortUserName(), null,
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SHARED_TRASH_PERMISSION);
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mkdirs(trashPath, permissionStatus, false);
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}
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}
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} catch (IOException e) {
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final String msg =
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"Could not provision Trash directory for existing "
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+ "snapshottable directories. Exiting Namenode.";
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ExitUtil.terminate(1, msg);
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}
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}
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}
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@ -2011,9 +2011,6 @@ public HAState getState() {
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public void startActiveServices() throws IOException {
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try {
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namesystem.startActiveServices();
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if (namesystem.isSnapshotTrashRootEnabled()) {
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namesystem.checkAndProvisionSnapshotTrashRoots();
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}
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startTrashEmptier(getConf());
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} catch (Throwable t) {
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doImmediateShutdown(t);
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@ -27,7 +27,9 @@
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/** Namesystem operations. */
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@InterfaceAudience.Private
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public interface Namesystem extends RwLock, SafeMode {
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/** Is this name system running? */
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/**
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* Is this name system running?
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*/
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boolean isRunning();
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BlockCollection getBlockCollection(long id);
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@ -55,4 +57,10 @@ public interface Namesystem extends RwLock, SafeMode {
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* @throws IOException
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*/
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void removeXattr(long id, String xattrName) throws IOException;
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/**
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* Check if snapshot roots are created for all existing snapshottable
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* directories. Create them if not.
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*/
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void checkAndProvisionSnapshotTrashRoots();
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}
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@ -2524,7 +2524,7 @@ public void testNameNodeCreateSnapshotTrashRootOnStartup()
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MiniDFSCluster cluster =
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new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
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try {
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final DistributedFileSystem dfs = cluster.getFileSystem();
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DistributedFileSystem dfs = cluster.getFileSystem();
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final Path testDir = new Path("/disallowss/test2/");
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final Path file0path = new Path(testDir, "file-0");
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dfs.create(file0path).close();
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@ -2535,7 +2535,20 @@ public void testNameNodeCreateSnapshotTrashRootOnStartup()
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// Set dfs.namenode.snapshot.trashroot.enabled=true
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conf.setBoolean("dfs.namenode.snapshot.trashroot.enabled", true);
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cluster.setNameNodeConf(0, conf);
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cluster.shutdown();
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conf.setInt(DFSConfigKeys.DFS_NAMENODE_SAFEMODE_EXTENSION_KEY, 0);
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conf.setInt(DFSConfigKeys.DFS_NAMENODE_SAFEMODE_MIN_DATANODES_KEY, 1);
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cluster.restartNameNode(0);
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dfs = cluster.getFileSystem();
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assertTrue(cluster.getNameNode().isInSafeMode());
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// Check .Trash existence, won't be created now
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assertFalse(dfs.exists(trashRoot));
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// Start a datanode
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cluster.startDataNodes(conf, 1, true, null, null);
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// Wait long enough for safemode check to retire
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try {
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Thread.sleep(1000);
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} catch (InterruptedException ignored) {}
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// Check .Trash existence, should be created now
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assertTrue(dfs.exists(trashRoot));
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// Check permission
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@ -2553,4 +2566,6 @@ public void testNameNodeCreateSnapshotTrashRootOnStartup()
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}
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}
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}
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}
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