HDFS-3573. Supply NamespaceInfo when instantiating JournalManagers. Contributed by Todd Lipcon and Ivan Kelly.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1403594 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -89,6 +89,9 @@ Release 2.0.3-alpha - Unreleased
     HDFS-4121. Add namespace declarations in hdfs .proto files for languages 
     other than java. (Binglin Chang via suresh)
 
+    HDFS-3573. Supply NamespaceInfo when instantiating JournalManagers. 
+    (todd and ivank via umamahesh)
+
   OPTIMIZATIONS
 
   BUG FIXES 

hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/main/java/org/apache/hadoop/contrib/bkjournal/BookKeeperJournalManager.java

@@ -22,6 +22,7 @@
 import org.apache.hadoop.hdfs.server.namenode.EditLogOutputStream;
 import org.apache.hadoop.hdfs.server.namenode.EditLogInputStream;
 import org.apache.hadoop.hdfs.server.namenode.FSEditLogOp;
+import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
 import org.apache.hadoop.conf.Configuration;
 
 import org.apache.bookkeeper.conf.ClientConfiguration;
@@ -158,11 +159,19 @@ private byte[] intToBytes(int i) {
       (byte)(i) };
   }
 
+  BookKeeperJournalManager(Configuration conf, URI uri) throws IOException {
+    this(conf, uri, null);
+    // TODO(ivank): update BookKeeperJournalManager to do something
+    // with the NamespaceInfo. This constructor has been added
+    // for compatibility with the old tests, and may be removed
+    // when the tests are updated.
+  }
+
   /**
    * Construct a Bookkeeper journal manager.
    */
-  public BookKeeperJournalManager(Configuration conf, URI uri)
+  public BookKeeperJournalManager(Configuration conf, URI uri,
-      throws IOException {
+      NamespaceInfo nsInfo) throws IOException {
     this.conf = conf;
     String zkConnect = uri.getAuthority().replace(";", ",");
     String zkPath = uri.getPath();

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

@@ -46,6 +46,7 @@
 import org.apache.hadoop.hdfs.server.namenode.NNStorage.NameNodeDirType;
 import org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeMetrics;
 import org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration;
+import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
 import org.apache.hadoop.hdfs.server.protocol.RemoteEditLogManifest;
 import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.security.token.delegation.DelegationKey;
@@ -301,7 +302,7 @@ synchronized void close() {
       endCurrentLogSegment(true);
     }
     
-    if (!journalSet.isEmpty()) {
+    if (journalSet != null && !journalSet.isEmpty()) {
       try {
         journalSet.close();
       } catch (IOException ioe) {
@@ -950,7 +951,10 @@ public synchronized void purgeLogsOlderThan(final long minTxIdToKeep) {
       minTxIdToKeep <= curSegmentTxId :
       "cannot purge logs older than txid " + minTxIdToKeep +
       " when current segment starts at " + curSegmentTxId;
-
+    if (minTxIdToKeep == 0) {
+      return;
+    }
+    
     // This could be improved to not need synchronization. But currently,
     // journalSet is not threadsafe, so we need to synchronize this method.
     try {
@@ -1206,8 +1210,9 @@ private JournalManager createJournal(URI uri) {
 
     try {
       Constructor<? extends JournalManager> cons
-        = clazz.getConstructor(Configuration.class, URI.class);
+        = clazz.getConstructor(Configuration.class, URI.class,
-      return cons.newInstance(conf, uri);
+            NamespaceInfo.class);
+      return cons.newInstance(conf, uri, storage.getNamespaceInfo());
     } catch (Exception e) {
       throw new IllegalArgumentException("Unable to construct journal, "
                                          + uri, e);

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

@@ -126,12 +126,6 @@ protected FSImage(Configuration conf,
     }
 
     this.editLog = new FSEditLog(conf, storage, editsDirs);
-    String nameserviceId = DFSUtil.getNamenodeNameServiceId(conf);
-    if (!HAUtil.isHAEnabled(conf, nameserviceId)) {
-      editLog.initJournalsForWrite();
-    } else {
-      editLog.initSharedJournalsForRead();
-    }
     
     archivalManager = new NNStorageRetentionManager(conf, storage, editLog);
   }
@@ -496,6 +490,7 @@ void doImportCheckpoint(FSNamesystem target) throws IOException {
     // return back the real image
     realImage.getStorage().setStorageInfo(ckptImage.getStorage());
     realImage.getEditLog().setNextTxId(ckptImage.getEditLog().getLastWrittenTxId()+1);
+    realImage.initEditLog();
 
     target.dir.fsImage = realImage;
     realImage.getStorage().setBlockPoolID(ckptImage.getBlockPoolID());
@@ -568,10 +563,8 @@ boolean loadFSImage(FSNamesystem target, MetaRecoveryContext recovery)
 
     Iterable<EditLogInputStream> editStreams = null;
 
-    if (editLog.isOpenForWrite()) {
+    initEditLog();
-      // We only want to recover streams if we're going into Active mode.
+
-      editLog.recoverUnclosedStreams();
-    }
     if (LayoutVersion.supports(Feature.TXID_BASED_LAYOUT, 
                                getLayoutVersion())) {
       // If we're open for write, we're either non-HA or we're the active NN, so
@@ -629,6 +622,17 @@ boolean loadFSImage(FSNamesystem target, MetaRecoveryContext recovery)
     return needToSave;
   }
 
+  public void initEditLog() {
+    Preconditions.checkState(getNamespaceID() != 0,
+        "Must know namespace ID before initting edit log");
+    String nameserviceId = DFSUtil.getNamenodeNameServiceId(conf);
+    if (!HAUtil.isHAEnabled(conf, nameserviceId)) {
+      editLog.initJournalsForWrite();
+      editLog.recoverUnclosedStreams();
+    } else {
+      editLog.initSharedJournalsForRead();
+    }
+  }
 
   /**
    * @param imageFile the image file that was loaded

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

@@ -238,12 +238,6 @@ synchronized public void selectInputStreams(
   static void addStreamsToCollectionFromFiles(Collection<EditLogFile> elfs,
       Collection<EditLogInputStream> streams, long fromTxId, boolean inProgressOk) {
     for (EditLogFile elf : elfs) {
-      if (elf.lastTxId < fromTxId) {
-        LOG.debug("passing over " + elf + " because it ends at " +
-            elf.lastTxId + ", but we only care about transactions " +
-            "as new as " + fromTxId);
-        continue;
-      }
       if (elf.isInProgress()) {
         if (!inProgressOk) {
           LOG.debug("passing over " + elf + " because it is in progress " +
@@ -258,6 +252,13 @@ static void addStreamsToCollectionFromFiles(Collection<EditLogFile> elfs,
           continue;
         }
       }
+      if (elf.lastTxId < fromTxId) {
+        assert elf.lastTxId != HdfsConstants.INVALID_TXID;
+        LOG.debug("passing over " + elf + " because it ends at " +
+            elf.lastTxId + ", but we only care about transactions " +
+            "as new as " + fromTxId);
+        continue;
+      }
       EditLogFileInputStream elfis = new EditLogFileInputStream(elf.getFile(),
             elf.getFirstTxId(), elf.getLastTxId(), elf.isInProgress());
       LOG.debug("selecting edit log stream " + elf);

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

@@ -1002,4 +1002,12 @@ FSImageStorageInspector readAndInspectDirs()
     inspectStorageDirs(inspector);
     return inspector;
   }
+
+  public NamespaceInfo getNamespaceInfo() {
+    return new NamespaceInfo(
+        getNamespaceID(),
+        getClusterID(),
+        getBlockPoolID(),
+        getCTime());
+  }
 }

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

@@ -64,7 +64,6 @@
 import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol;
 import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
 import org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration;
-import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
 import org.apache.hadoop.ipc.Server;
 import org.apache.hadoop.ipc.StandbyException;
 import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
@@ -863,11 +862,7 @@ private static boolean initializeSharedEdits(Configuration conf,
           Lists.<URI>newArrayList(),
           sharedEditsDirs);
       
-      newSharedStorage.format(new NamespaceInfo(
+      newSharedStorage.format(existingStorage.getNamespaceInfo());
-          existingStorage.getNamespaceID(),
-          existingStorage.getClusterID(),
-          existingStorage.getBlockPoolID(),
-          existingStorage.getCTime()));
       
       // Need to make sure the edit log segments are in good shape to initialize
       // the shared edits dir.

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

@@ -189,6 +189,8 @@ private int doRun() throws IOException {
     // Load the newly formatted image, using all of the directories (including shared
     // edits)
     FSImage image = new FSImage(conf);
+    image.getStorage().setStorageInfo(storage);
+    image.initEditLog();
     assert image.getEditLog().isOpenForRead() :
         "Expected edit log to be open for read";
     

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestGenericJournalConf.java

@@ -18,18 +18,23 @@
 package org.apache.hadoop.hdfs.server.namenode;
 
 import static org.junit.Assert.fail;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertEquals;
 import static org.mockito.Mockito.mock;
 
 import java.io.IOException;
 import java.net.URI;
 import java.util.Collection;
 
+import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.junit.Test;
 
 public class TestGenericJournalConf {
+  private static final String DUMMY_URI = "dummy://test";
+
   /** 
    * Test that an exception is thrown if a journal class doesn't exist
    * in the configuration 
@@ -114,12 +119,17 @@ public void testDummyJournalManager() throws Exception {
 
     conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_PLUGIN_PREFIX + ".dummy",
              DummyJournalManager.class.getName());
-    conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY,
+    conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY, DUMMY_URI);
-             "dummy://test");
     conf.setInt(DFSConfigKeys.DFS_NAMENODE_CHECKED_VOLUMES_MINIMUM_KEY, 0);
     try {
       cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build();
       cluster.waitActive();
+      
+      assertNotNull(DummyJournalManager.conf);
+      assertEquals(new URI(DUMMY_URI), DummyJournalManager.uri);
+      assertNotNull(DummyJournalManager.nsInfo);
+      assertEquals(DummyJournalManager.nsInfo.getClusterID(),
+          cluster.getNameNode().getNamesystem().getClusterId());
     } finally {
       if (cluster != null) {
         cluster.shutdown();
@@ -128,7 +138,17 @@ public void testDummyJournalManager() throws Exception {
   }
 
   public static class DummyJournalManager implements JournalManager {
-    public DummyJournalManager(Configuration conf, URI u) {}
+    static Configuration conf = null;
+    static URI uri = null;
+    static NamespaceInfo nsInfo = null;
+    
+    public DummyJournalManager(Configuration conf, URI u,
+        NamespaceInfo nsInfo) {
+      // Set static vars so the test case can verify them.
+      DummyJournalManager.conf = conf;
+      DummyJournalManager.uri = u;
+      DummyJournalManager.nsInfo = nsInfo; 
+    }
     
     @Override
     public EditLogOutputStream startLogSegment(long txId) throws IOException {
@@ -162,7 +182,7 @@ public void close() throws IOException {}
 
   public static class BadConstructorJournalManager extends DummyJournalManager {
     public BadConstructorJournalManager() {
-      super(null, null);
+      super(null, null, null);
     }
   }
 }