Package org.apache.accumulo.server.zookeeper

Examples of org.apache.accumulo.server.zookeeper.IZooReaderWriter

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  /**
   * @return
   */
  private static boolean zookeeperAvailable() {
    IZooReaderWriter zoo = ZooReaderWriter.getInstance();
    try {
      return zoo.exists("/");
    } catch (KeeperException e) {
      return false;
    } catch (InterruptedException e) {
      return false;
    }
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    }
  }
 
  private static void initZooKeeper(String uuid, String instanceNamePath) throws KeeperException, InterruptedException {
    // setup basic data in zookeeper
    IZooReaderWriter zoo = ZooReaderWriter.getInstance();
    ZooUtil.putPersistentData(zoo.getZooKeeper(), Constants.ZROOT, new byte[0], -1, NodeExistsPolicy.SKIP, Ids.OPEN_ACL_UNSAFE);
    ZooUtil.putPersistentData(zoo.getZooKeeper(), Constants.ZROOT + Constants.ZINSTANCES, new byte[0], -1, NodeExistsPolicy.SKIP, Ids.OPEN_ACL_UNSAFE);
   
    // setup instance name
    if (clearInstanceName)
      zoo.recursiveDelete(instanceNamePath, NodeMissingPolicy.SKIP);
    zoo.putPersistentData(instanceNamePath, uuid.getBytes(), NodeExistsPolicy.FAIL);
   
    // setup the instance
    String zkInstanceRoot = Constants.ZROOT + "/" + uuid;
    zoo.putPersistentData(zkInstanceRoot, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZTABLES, Constants.ZTABLES_INITIAL_ID, NodeExistsPolicy.FAIL);
    TableManager.prepareNewTableState(uuid, Constants.METADATA_TABLE_ID, Constants.METADATA_TABLE_NAME, TableState.ONLINE, NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZTSERVERS, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZPROBLEMS, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZROOT_TABLET, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZROOT_TABLET_WALOGS, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZLOGGERS, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZTRACERS, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZMASTERS, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZMASTER_LOCK, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZMASTER_GOAL_STATE, MasterGoalState.NORMAL.toString().getBytes(), NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZGC, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZGC_LOCK, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZCONFIG, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZTABLE_LOCKS, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZHDFS_RESERVATIONS, new byte[0], NodeExistsPolicy.FAIL);
    zoo.putPersistentData(zkInstanceRoot + Constants.ZNEXT_FILE, new byte[] {'0'}, NodeExistsPolicy.FAIL);
  }
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  ZooLock getLock() {
    return tabletServerLock;
  }
 
  private void announceExistence() {
    IZooReaderWriter zoo = ZooReaderWriter.getInstance();
    try {
      String zPath = ZooUtil.getRoot(HdfsZooInstance.getInstance()) + Constants.ZTSERVERS + "/" + getClientAddressString();
     
      zoo.putPersistentData(zPath, new byte[] {}, NodeExistsPolicy.SKIP);
     
      tabletServerLock = new ZooLock(zPath);
     
      LockWatcher lw = new LockWatcher() {
       
        @Override
        public void lostLock(final LockLossReason reason) {
          Halt.halt(0, new Runnable() {
            public void run() {
              if (!serverStopRequested)
                log.fatal("Lost tablet server lock (reason = " + reason + "), exiting.");
              logGCInfo();
            }
          });
        }
      };
     
      byte[] lockContent = new ServerServices(getClientAddressString(), Service.TSERV_CLIENT).toString().getBytes();
      for (int i = 0; i < 120 / 5; i++) {
        zoo.putPersistentData(zPath, new byte[0], NodeExistsPolicy.SKIP);
       
        if (tabletServerLock.tryLock(lw, lockContent)) {
          log.debug("Obtained tablet server lock " + tabletServerLock.getLockPath());
          return;
        }
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  }
 

  private void registerInZooKeeper(String name) throws Exception {
    String root = ZooUtil.getRoot(HdfsZooInstance.getInstance()) + Constants.ZTRACERS;
    IZooReaderWriter zoo = ZooReaderWriter.getInstance();
    String path = zoo.putEphemeralSequential(root + "/trace-", name.getBytes());
    zoo.exists(path, this);
  }
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  }
 
  @Override
  public void run() throws Exception {
    String zPath = ZooUtil.getRoot(HdfsZooInstance.getInstance()) + "/testLock";
    IZooReaderWriter zoo = ZooReaderWriter.getInstance();
    zoo.putPersistentData(zPath, "".getBytes(), NodeExistsPolicy.OVERWRITE);
    ZooLock zl = new ZooLock(zPath);
    boolean gotLock = zl.tryLock(new LockWatcher() {
     
      @Override
      public void lostLock(LockLossReason reason) {
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          flushId);
    }
   
    void bringMinorCompactionOnline(Path tmpDatafile, Path newDatafile, Path absMergeFile, DataFileValue dfv, CommitSession commitSession, long flushId) {
     
      IZooReaderWriter zoo = ZooReaderWriter.getRetryingInstance();
      if (extent.equals(Constants.ROOT_TABLET_EXTENT)) {
        try {
          if (!zoo.isLockHeld(tabletServer.getLock().getLockID())) {
            throw new IllegalStateException();
          }
        } catch (Exception e) {
          throw new IllegalStateException("Can not bring major compaction online, lock not held", e);
        }
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      TServerInstance lastLocation = null;
      synchronized (Tablet.this) {
       
        t1 = System.currentTimeMillis();
       
        IZooReaderWriter zoo = ZooReaderWriter.getRetryingInstance();
       
        dataSourceDeletions.incrementAndGet();
       
        if (extent.equals(Constants.ROOT_TABLET_EXTENT)) {
         
          waitForScansToFinish(oldDatafiles, true, Long.MAX_VALUE);
         
          try {
            if (!zoo.isLockHeld(tabletServer.getLock().getLockID())) {
              throw new IllegalStateException();
            }
          } catch (Exception e) {
            throw new IllegalStateException("Can not bring major compaction online, lock not held", e);
          }
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    Runtime.getRuntime().halt(0);
  }
 
  void registerInZooKeeper(String zooDir) {
    try {
      IZooReaderWriter zoo = ZooReaderWriter.getInstance();
      String path = ZooUtil.getRoot(HdfsZooInstance.getInstance()) + zooDir;
      path += "/logger-";
      path = zoo.putEphemeralSequential(path, addressString.getBytes());
      ephemeralNode = path;
      zoo.exists(path, this);
    } catch (Exception ex) {
      throw new RuntimeException("Unexpected error creating zookeeper entry " + zooDir);
    }
  }
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Related Classes of org.apache.accumulo.server.zookeeper.IZooReaderWriter

  • org.apache.accumulo.server.fate.Admin
  • org.apache.accumulo.server.gc.GarbageCollectWriteAheadLogs
  • org.apache.accumulo.server.logger.LogService
  • org.apache.accumulo.server.master.Master
  • org.apache.accumulo.server.master.Master$MasterClientServiceHandler
  • org.apache.accumulo.server.master.state.DeadServerList
  • org.apache.accumulo.server.master.state.tables.TableManager
  • org.apache.accumulo.server.master.state.ZooStore
  • org.apache.accumulo.server.master.tableOps.CompactRange
  • org.apache.accumulo.server.master.tableOps.RenameTable
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