Package org.apache.hadoop.ipc.RetryCache

Examples of org.apache.hadoop.ipc.RetryCache.CacheEntry

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   *
   * @throws AccessControlException if superuser privilege is violated.
   * @throws IOException if
   */
  void saveNamespace() throws AccessControlException, IOException {
    CacheEntry cacheEntry = RetryCache.waitForCompletion(retryCache);
    if (cacheEntry != null && cacheEntry.isSuccess()) {
      return; // Return previous response
    }
    checkSuperuserPrivilege();
    checkOperation(OperationCategory.UNCHECKED);
    boolean success = false;
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    }
  }
 
  void endCheckpoint(NamenodeRegistration registration,
                            CheckpointSignature sig) throws IOException {
    CacheEntry cacheEntry = RetryCache.waitForCompletion(retryCache);
    if (cacheEntry != null && cacheEntry.isSuccess()) {
      return; // Return previous response
    }
    checkOperation(OperationCategory.CHECKPOINT);
    boolean success = false;
    readLock();
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   * @throws IOException if any error occurs
   */
  void updatePipeline(String clientName, ExtendedBlock oldBlock,
      ExtendedBlock newBlock, DatanodeID[] newNodes)
      throws IOException {
    CacheEntry cacheEntry = RetryCache.waitForCompletion(retryCache);
    if (cacheEntry != null && cacheEntry.isSuccess()) {
      return; // Return previous response
    }
    checkOperation(OperationCategory.WRITE);
    LOG.info("updatePipeline(block=" + oldBlock
             + ", newGenerationStamp=" + newBlock.getGenerationStamp()
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   * @throws SafeModeException
   * @throws IOException
   */
  void renameSnapshot(String path, String snapshotOldName,
      String snapshotNewName) throws SafeModeException, IOException {
    CacheEntry cacheEntry = RetryCache.waitForCompletion(retryCache);
    if (cacheEntry != null && cacheEntry.isSuccess()) {
      return; // Return previous response
    }
    final FSPermissionChecker pc = getPermissionChecker();
    writeLock();
    boolean success = false;
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   * @throws IOException
   */
  void deleteSnapshot(String snapshotRoot, String snapshotName)
      throws SafeModeException, IOException {
    final FSPermissionChecker pc = getPermissionChecker();
    CacheEntry cacheEntry = RetryCache.waitForCompletion(retryCache);
    if (cacheEntry != null && cacheEntry.isSuccess()) {
      return; // Return previous response
    }
    boolean success = false;
    writeLock();
    try {
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    Map<CacheEntry, CacheEntry> oldEntries =
        new HashMap<CacheEntry, CacheEntry>();
    Iterator<CacheEntry> iter = cacheSet.iterator();
    while (iter.hasNext()) {
      CacheEntry entry = iter.next();
      oldEntries.put(entry, entry);
    }
   
    // 2. Failover the current standby to active.
    cluster.getNameNode(0).getRpcServer().rollEditLog();
    cluster.getNameNode(1).getNamesystem().getEditLogTailer().doTailEdits();
   
    cluster.shutdownNameNode(0);
    cluster.transitionToActive(1);
   
    // 3. check the retry cache on the new active NN
    FSNamesystem fsn1 = cluster.getNamesystem(1);
    cacheSet = (LightWeightCache<CacheEntry, CacheEntry>) fsn1
        .getRetryCache().getCacheSet();
    assertEquals(14, cacheSet.size());
    iter = cacheSet.iterator();
    while (iter.hasNext()) {
      CacheEntry entry = iter.next();
      assertTrue(oldEntries.containsKey(entry));
    }
  }
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    Map<CacheEntry, CacheEntry> oldEntries =
        new HashMap<CacheEntry, CacheEntry>();
    Iterator<CacheEntry> iter = cacheSet.iterator();
    while (iter.hasNext()) {
      CacheEntry entry = iter.next();
      oldEntries.put(entry, entry);
    }
   
    // restart NameNode
    cluster.restartNameNode();
    cluster.waitActive();
    namesystem = cluster.getNamesystem();
   
    // check retry cache
    assertTrue(namesystem.hasRetryCache());
    cacheSet = (LightWeightCache<CacheEntry, CacheEntry>) namesystem
        .getRetryCache().getCacheSet();
    assertEquals(14, cacheSet.size());
    iter = cacheSet.iterator();
    while (iter.hasNext()) {
      CacheEntry entry = iter.next();
      assertTrue(oldEntries.containsKey(entry));
    }
  }
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   * @param srcs
   * @throws IOException
   */
  void concat(String target, String [] srcs)
      throws IOException, UnresolvedLinkException {
    CacheEntry cacheEntry = RetryCache.waitForCompletion(retryCache);
    if (cacheEntry != null && cacheEntry.isSuccess()) {
      return; // Return previous response
    }
   
    // Either there is no previous request in progres or it has failed
    if(FSNamesystem.LOG.isDebugEnabled()) {
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   * Create a symbolic link.
   */
  void createSymlink(String target, String link,
      PermissionStatus dirPerms, boolean createParent)
      throws IOException, UnresolvedLinkException {
    CacheEntry cacheEntry = RetryCache.waitForCompletion(retryCache);
    if (cacheEntry != null && cacheEntry.isSuccess()) {
      return; // Return previous response
    }
    if (!DFSUtil.isValidName(link)) {
      throw new InvalidPathException("Invalid link name: " + link);
    }
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   * @deprecated Use {@link #renameTo(String, String, Options.Rename...)} instead.
   */
  @Deprecated
  boolean renameTo(String src, String dst)
      throws IOException, UnresolvedLinkException {
    CacheEntry cacheEntry = RetryCache.waitForCompletion(retryCache);
    if (cacheEntry != null && cacheEntry.isSuccess()) {
      return true; // Return previous response
    }
    boolean ret = false;
    try {
      ret = renameToInt(src, dst, cacheEntry != null);
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Related Classes of org.apache.hadoop.ipc.RetryCache.CacheEntry

  • org.apache.hadoop.hdfs.server.namenode.FSNamesystem
  • org.apache.hadoop.hdfs.server.namenode.ha.TestRetryCacheWithHA
  • org.apache.hadoop.hdfs.server.namenode.TestNamenodeRetryCache
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