HDFS-7645. Rolling upgrade is restoring blocks from trash multiple times (Contributed by Vinayakumar B and Keisuke Ogiwara)

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -359,6 +359,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-7890. Improve information on Top users for metrics in
     RollingWindowsManager and lower log level (J.Andreina via vinayakumarb)
 
+    HDFS-7645. Rolling upgrade is restoring blocks from trash multiple times.
+    (Vinayakumar B and Keisuke Ogiwara via Arpit Agarwal)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/RollingUpgradeInfo.java

@@ -29,12 +29,12 @@ import org.apache.hadoop.classification.InterfaceStability;
 @InterfaceStability.Evolving
 public class RollingUpgradeInfo extends RollingUpgradeStatus {
   private final long startTime;
-  private final long finalizeTime;
+  private long finalizeTime;
   private boolean createdRollbackImages;
   
   public RollingUpgradeInfo(String blockPoolId, boolean createdRollbackImages,
       long startTime, long finalizeTime) {
-    super(blockPoolId);
+    super(blockPoolId, finalizeTime != 0);
     this.createdRollbackImages = createdRollbackImages;
     this.startTime = startTime;
     this.finalizeTime = finalizeTime;
@@ -56,11 +56,23 @@ public class RollingUpgradeInfo extends RollingUpgradeStatus {
   public long getStartTime() {
     return startTime;
   }
-  
+
+  @Override
   public boolean isFinalized() {
     return finalizeTime != 0;
   }
 
+  /**
+   * Finalize the upgrade if not already finalized
+   * @param finalizeTime
+   */
+  public void finalize(long finalizeTime) {
+    if (finalizeTime != 0) {
+      this.finalizeTime = finalizeTime;
+      createdRollbackImages = false;
+    }
+  }
+
   public long getFinalizeTime() {
     return finalizeTime;
   }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/RollingUpgradeStatus.java

@@ -27,15 +27,21 @@ import org.apache.hadoop.classification.InterfaceStability;
 @InterfaceStability.Evolving
 public class RollingUpgradeStatus {
   private final String blockPoolId;
+  private final boolean finalized;
 
-  public RollingUpgradeStatus(String blockPoolId) {
+  public RollingUpgradeStatus(String blockPoolId, boolean finalized) {
     this.blockPoolId = blockPoolId;
+    this.finalized = finalized;
   }
 
   public String getBlockPoolId() {
     return blockPoolId;
   }
 
+  public boolean isFinalized() {
+    return finalized;
+  }
+
   @Override
   public int hashCode() {
     return blockPoolId.hashCode();
@@ -48,8 +54,9 @@ public class RollingUpgradeStatus {
     } else if (obj == null || !(obj instanceof RollingUpgradeStatus)) {
       return false;
     }
-    final RollingUpgradeStatus that = (RollingUpgradeStatus)obj;
-    return this.blockPoolId.equals(that.blockPoolId);
+    final RollingUpgradeStatus that = (RollingUpgradeStatus) obj;
+    return this.blockPoolId.equals(that.blockPoolId)
+        && this.isFinalized() == that.isFinalized();
   }
 
   @Override

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelper.java

@@ -1686,11 +1686,13 @@ public class PBHelper {
       RollingUpgradeStatus status) {
     return RollingUpgradeStatusProto.newBuilder()
         .setBlockPoolId(status.getBlockPoolId())
+        .setFinalized(status.isFinalized())
         .build();
   }
 
   public static RollingUpgradeStatus convert(RollingUpgradeStatusProto proto) {
-    return new RollingUpgradeStatus(proto.getBlockPoolId());
+    return new RollingUpgradeStatus(proto.getBlockPoolId(),
+        proto.getFinalized());
   }
 
   public static RollingUpgradeInfoProto convert(RollingUpgradeInfo info) {

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPOfferService.java

@@ -29,6 +29,7 @@ import org.apache.hadoop.ha.HAServiceProtocol.HAServiceState;
 import org.apache.hadoop.hdfs.protocol.Block;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
+import org.apache.hadoop.hdfs.protocol.RollingUpgradeStatus;
 import org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB;
 import org.apache.hadoop.hdfs.server.protocol.*;
 import org.apache.hadoop.hdfs.server.protocol.ReceivedDeletedBlockInfo.BlockStatus;
@@ -470,15 +471,19 @@ class BPOfferService {
   
   /**
    * Signal the current rolling upgrade status as indicated by the NN.
-   * @param inProgress true if a rolling upgrade is in progress
+   * @param rollingUpgradeStatus rolling upgrade status
    */
-  void signalRollingUpgrade(boolean inProgress) throws IOException {
+  void signalRollingUpgrade(RollingUpgradeStatus rollingUpgradeStatus)
+      throws IOException {
+    if (rollingUpgradeStatus == null) {
+      return;
+    }
     String bpid = getBlockPoolId();
-    if (inProgress) {
+    if (!rollingUpgradeStatus.isFinalized()) {
       dn.getFSDataset().enableTrash(bpid);
       dn.getFSDataset().setRollingUpgradeMarker(bpid);
     } else {
-      dn.getFSDataset().restoreTrash(bpid);
+      dn.getFSDataset().clearTrash(bpid);
       dn.getFSDataset().clearRollingUpgradeMarker(bpid);
     }
   }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java

@@ -662,7 +662,7 @@ class BPServiceActor implements Runnable {
           " in HeartbeatResponse. Expected " +
           bpos.getBlockPoolId());
     } else {
-      bpos.signalRollingUpgrade(rollingUpgradeStatus != null);
+      bpos.signalRollingUpgrade(rollingUpgradeStatus);
     }
   }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockPoolSliceStorage.java

@@ -351,7 +351,8 @@ public class BlockPoolSliceStorage extends Storage {
           sd.getPreviousDir() + " and " + getTrashRootDir(sd) + " should not " +
           " both be present.");
       doRollback(sd, nsInfo); // rollback if applicable
-    } else {
+    } else if (startOpt == StartupOption.ROLLBACK &&
+        !sd.getPreviousDir().exists()) {
       // Restore all the files in the trash. The restored files are retained
       // during rolling upgrade rollback. They are deleted during rolling
       // upgrade downgrade.
@@ -378,6 +379,12 @@ public class BlockPoolSliceStorage extends Storage {
         && this.cTime == nsInfo.getCTime()) {
       return; // regular startup
     }
+    if (this.layoutVersion > HdfsConstants.DATANODE_LAYOUT_VERSION) {
+      int restored = restoreBlockFilesFromTrash(getTrashRootDir(sd));
+      LOG.info("Restored " + restored + " block files from trash " +
+        "before the layout upgrade. These blocks will be moved to " +
+        "the previous directory during the upgrade");
+    }
     if (this.layoutVersion > HdfsConstants.DATANODE_LAYOUT_VERSION
         || this.cTime < nsInfo.getCTime()) {
       doUpgrade(datanode, sd, nsInfo); // upgrade
@@ -730,16 +737,12 @@ public class BlockPoolSliceStorage extends Storage {
   /**
    * Delete all files and directories in the trash directories.
    */
-  public void restoreTrash() {
+  public void clearTrash() {
     for (StorageDirectory sd : storageDirs) {
       File trashRoot = getTrashRootDir(sd);
-      try {
-        Preconditions.checkState(!(trashRoot.exists() && sd.getPreviousDir().exists()));
-        restoreBlockFilesFromTrash(trashRoot);
-        FileUtil.fullyDelete(getTrashRootDir(sd));
-      } catch (IOException ioe) {
-        LOG.warn("Restoring trash failed for storage directory " + sd);
-      }
+      Preconditions.checkState(!(trashRoot.exists() && sd.getPreviousDir().exists()));
+      FileUtil.fullyDelete(trashRoot);
+      LOG.info("Cleared trash for storage directory " + sd);
     }
   }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataStorage.java

@@ -168,11 +168,11 @@ public class DataStorage extends Storage {
     }
   }
 
-  public void restoreTrash(String bpid) {
+  public void clearTrash(String bpid) {
     if (trashEnabledBpids.contains(bpid)) {
-      getBPStorage(bpid).restoreTrash();
+      getBPStorage(bpid).clearTrash();
       trashEnabledBpids.remove(bpid);
-      LOG.info("Restored trash for bpid " + bpid);
+      LOG.info("Cleared trash for bpid " + bpid);
     }
   }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/FsDatasetSpi.java

@@ -490,9 +490,9 @@ public interface FsDatasetSpi<V extends FsVolumeSpi> extends FSDatasetMBean {
   public void enableTrash(String bpid);
 
   /**
-   * Restore trash
+   * Clear trash
    */
-  public void restoreTrash(String bpid);
+  public void clearTrash(String bpid);
 
   /**
    * @return true when trash is enabled

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java

@@ -2619,8 +2619,8 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
   }
 
   @Override
-  public void restoreTrash(String bpid) {
-    dataStorage.restoreTrash(bpid);
+  public void clearTrash(String bpid) {
+    dataStorage.clearTrash(bpid);
   }
 
   @Override

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java

@@ -7568,7 +7568,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
 
   /** Is rolling upgrade in progress? */
   public boolean isRollingUpgrade() {
-    return rollingUpgradeInfo != null;
+    return rollingUpgradeInfo != null && !rollingUpgradeInfo.isFinalized();
   }
 
   void checkRollingUpgrade(String action) throws RollingUpgradeException {
@@ -7583,7 +7583,6 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     checkSuperuserPrivilege();
     checkOperation(OperationCategory.WRITE);
     writeLock();
-    final RollingUpgradeInfo returnInfo;
     try {
       checkOperation(OperationCategory.WRITE);
       if (!isRollingUpgrade()) {
@@ -7591,8 +7590,8 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
       }
       checkNameNodeSafeMode("Failed to finalize rolling upgrade");
 
-      returnInfo = finalizeRollingUpgradeInternal(now());
-      getEditLog().logFinalizeRollingUpgrade(returnInfo.getFinalizeTime());
+      finalizeRollingUpgradeInternal(now());
+      getEditLog().logFinalizeRollingUpgrade(rollingUpgradeInfo.getFinalizeTime());
       if (haEnabled) {
         // roll the edit log to make sure the standby NameNode can tail
         getFSImage().rollEditLog();
@@ -7612,14 +7611,12 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     if (auditLog.isInfoEnabled() && isExternalInvocation()) {
       logAuditEvent(true, "finalizeRollingUpgrade", null, null, null);
     }
-    return returnInfo;
+    return rollingUpgradeInfo;
   }
 
-  RollingUpgradeInfo finalizeRollingUpgradeInternal(long finalizeTime)
-      throws RollingUpgradeException {
-    final long startTime = rollingUpgradeInfo.getStartTime();
-    rollingUpgradeInfo = null;
-    return new RollingUpgradeInfo(blockPoolId, false, startTime, finalizeTime);
+  void finalizeRollingUpgradeInternal(long finalizeTime) {
+    // Set the finalize time
+    rollingUpgradeInfo.finalize(finalizeTime);
   }
 
   long addCacheDirective(CacheDirectiveInfo directive,

hadoop-hdfs-project/hadoop-hdfs/src/main/proto/hdfs.proto

@@ -607,4 +607,5 @@ message SnapshotInfoProto {
  */
 message RollingUpgradeStatusProto {
   required string blockPoolId = 1;
+  optional bool finalized = 2 [default = false];
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.html

@@ -79,6 +79,9 @@
   <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
 
   {#RollingUpgradeStatus}
+   {@if cond="{finalizeTime} > 0"}
+      <p>Rolling upgrade finalized at {#helper_date_tostring value="{finalizeTime}"/}. </p>
+   {:else}
     <p>Rolling upgrade started at {#helper_date_tostring value="{startTime}"/}. </br>
     {#createdRollbackImages}
       Rollback image has been created. Proceed to upgrade daemons.
@@ -86,6 +89,7 @@
       Rollback image has not been created.
     {/createdRollbackImages}
     </p>
+   {/if}
   {/RollingUpgradeStatus}
 
   {@if cond="{DistinctVersionCount} > 1"}

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/SimulatedFSDataset.java

@@ -1226,7 +1226,7 @@ public class SimulatedFSDataset implements FsDatasetSpi<FsVolumeSpi> {
   }
 
   @Override
-  public void restoreTrash(String bpid) {
+  public void clearTrash(String bpid) {
   }
 
   @Override

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeRollingUpgrade.java

@@ -19,12 +19,7 @@
 package org.apache.hadoop.hdfs.server.datanode;
 
 import static org.hamcrest.core.Is.is;
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertThat;
-import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.*;
 
 import java.io.File;
 import java.io.IOException;
@@ -43,7 +38,9 @@ import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.HdfsConfiguration;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.MiniDFSCluster.Builder;
+import org.apache.hadoop.hdfs.MiniDFSCluster.DataNodeProperties;
 import org.apache.hadoop.hdfs.TestRollingUpgrade;
+import org.apache.hadoop.hdfs.client.BlockReportOptions;
 import org.apache.hadoop.hdfs.protocol.BlockLocalPathInfo;
 import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
 import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
@@ -208,29 +205,53 @@ public class TestDataNodeRollingUpgrade {
   public void testDatanodeRollingUpgradeWithFinalize() throws Exception {
     try {
       startCluster();
+      rollingUpgradeAndFinalize();
+      // Do it again
+      rollingUpgradeAndFinalize();
+    } finally {
+      shutdownCluster();
+    }
+  }
 
-      // Create files in DFS.
-      Path testFile1 = new Path("/" + GenericTestUtils.getMethodName() + ".01.dat");
-      Path testFile2 = new Path("/" + GenericTestUtils.getMethodName() + ".02.dat");
-      DFSTestUtil.createFile(fs, testFile1, FILE_SIZE, REPL_FACTOR, SEED);
-      DFSTestUtil.createFile(fs, testFile2, FILE_SIZE, REPL_FACTOR, SEED);
-
-      startRollingUpgrade();
-      File blockFile = getBlockForFile(testFile2, true);
-      File trashFile = getTrashFileForBlock(blockFile, false);
-      deleteAndEnsureInTrash(testFile2, blockFile, trashFile);
-      finalizeRollingUpgrade();
-
-      // Ensure that delete file testFile2 stays deleted after finalize
-      assertFalse(isTrashRootPresent());
-      assert(!fs.exists(testFile2));
-      assert(fs.exists(testFile1));
-
+  @Test(timeout = 600000)
+  public void testDatanodeRUwithRegularUpgrade() throws Exception {
+    try {
+      startCluster();
+      rollingUpgradeAndFinalize();
+      DataNodeProperties dn = cluster.stopDataNode(0);
+      cluster.restartNameNode(0, true, "-upgrade");
+      cluster.restartDataNode(dn, true);
+      cluster.waitActive();
+      fs = cluster.getFileSystem(0);
+      Path testFile3 = new Path("/" + GenericTestUtils.getMethodName()
+          + ".03.dat");
+      DFSTestUtil.createFile(fs, testFile3, FILE_SIZE, REPL_FACTOR, SEED);
+      cluster.getFileSystem().finalizeUpgrade();
     } finally {
       shutdownCluster();
     }
   }
 
+  private void rollingUpgradeAndFinalize() throws IOException, Exception {
+    // Create files in DFS.
+    Path testFile1 = new Path("/" + GenericTestUtils.getMethodName() + ".01.dat");
+    Path testFile2 = new Path("/" + GenericTestUtils.getMethodName() + ".02.dat");
+    DFSTestUtil.createFile(fs, testFile1, FILE_SIZE, REPL_FACTOR, SEED);
+    DFSTestUtil.createFile(fs, testFile2, FILE_SIZE, REPL_FACTOR, SEED);
+
+    startRollingUpgrade();
+    File blockFile = getBlockForFile(testFile2, true);
+    File trashFile = getTrashFileForBlock(blockFile, false);
+    cluster.triggerBlockReports();
+    deleteAndEnsureInTrash(testFile2, blockFile, trashFile);
+    finalizeRollingUpgrade();
+
+    // Ensure that delete file testFile2 stays deleted after finalize
+    assertFalse(isTrashRootPresent());
+    assert(!fs.exists(testFile2));
+    assert(fs.exists(testFile1));
+  }
+
   @Test (timeout=600000)
   public void testDatanodeRollingUpgradeWithRollback() throws Exception {
     try {

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/extdataset/ExternalDatasetImpl.java

@@ -306,7 +306,7 @@ public class ExternalDatasetImpl implements FsDatasetSpi<ExternalVolumeImpl> {
   }
 
   @Override
-  public void restoreTrash(String bpid) {
+  public void clearTrash(String bpid) {
 
   }