Examples of org.apache.hadoop.util.Daemon

org.apache.hadoop.util.Daemon
A thread that has called {@link Thread#setDaemon(boolean) } with true.

        reportStatus("STATE* Safe mode ON.", false);
        return;
      }
      // start monitor
      reached = now();
      smmthread = new Daemon(new SafeModeMonitor());
      smmthread.start();
      reportStatus("STATE* Safe mode extension entered.", true);


      // check if we are ready to initialize replication queues
      if (canInitializeReplQueues() && !isPopulatingReplQueues()) {

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    rename(prevDir, tmpDir);


    // 2. delete finalized.tmp dir in a separate thread
    // Also delete the blocksBeingWritten from HDFS 1.x and earlier, if
    // it exists.
    new Daemon(new Runnable() {
        @Override
        public void run() {
          try {
            deleteDir(tmpDir);
            if (bbwDir.exists()) {

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      mirrorAddr = mirrAddr;
      throttler = throttlerArg;


    try {
      if (isClient && !isTransfer) {
        responder = new Daemon(datanode.threadGroup, 
            new PacketResponder(replyOut, mirrIn, downstreams));
        responder.start(); // start thread to processes responses
      }


      /*

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  void startMonitor() {
    Preconditions.checkState(lmthread == null,
        "Lease Monitor already running");
    shouldRunMonitor = true;
    lmthread = new Daemon(new Monitor());
    lmthread.start();
  }

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  private Daemon decommissionthread = null;


  void activate(final Configuration conf) {
    final DecommissionManager dm = new DecommissionManager(namesystem, blockManager);
    this.decommissionthread = new Daemon(dm.new Monitor(
        conf.getInt(DFSConfigKeys.DFS_NAMENODE_DECOMMISSION_INTERVAL_KEY, 
                    DFSConfigKeys.DFS_NAMENODE_DECOMMISSION_INTERVAL_DEFAULT),
        conf.getInt(DFSConfigKeys.DFS_NAMENODE_DECOMMISSION_NODES_PER_INTERVAL_KEY, 
                    DFSConfigKeys.DFS_NAMENODE_DECOMMISSION_NODES_PER_INTERVAL_DEFAULT)));
    decommissionthread.start();

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    // rename previous to finalized.tmp
    final File tmpDir = bpSd.getFinalizedTmp();
    rename(prevDir, tmpDir);


    // delete finalized.tmp dir in a separate thread
    new Daemon(new Runnable() {
      @Override
      public void run() {
        try {
          deleteDir(tmpDir);
        } catch (IOException ex) {

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      int ret = secondary.processStartupCommand(opts);
      terminate(ret);
    }


    // Create a never ending deamon
    Daemon checkpointThread = new Daemon(secondary);
    checkpointThread.start();
  }

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    pendingReplications = new HashMap<Block, PendingBlockInfo>();
    timedOutItems = new ArrayList<Block>();
  }


  void start() {
    timerThread = new Daemon(new PendingReplicationMonitor());
    timerThread.start();
  }

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    buildINodeToParentMap();
    
    lastNodeCompletionTime = System.currentTimeMillis();
    
    monitorThread = new Daemon(new UpgradeMonitor());
    monitorThread.start();    
    
    return super.startUpgrade();
  }

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    final File tmpDir = sd.getFinalizedTmp();
    // rename previous to tmp
    rename(prevDir, tmpDir);


    // delete tmp dir in a separate thread
    new Daemon(new Runnable() {
        public void run() {
          try {
            deleteDir(tmpDir);
          } catch(IOException ex) {
            LOG.error("Finalize upgrade for " + dataDirPath + " failed.", ex);

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Related Classes of org.apache.hadoop.util.Daemon

io.fabric8.hadoop.hdfs.SecondaryNameNodeFactory

io.fabric8.hadoop.mapred.TaskTrackerFactory

org.apache.hadoop.corona.SessionDriver

org.apache.hadoop.dfs.BlockCrcUpgradeObjectNamenode

org.apache.hadoop.dfs.DataStorage

org.apache.hadoop.dfs.SecondaryNameNode

org.apache.hadoop.dfs.UpgradeManagerDatanode

org.apache.hadoop.hdfs.DFSClient$BlockLocationRenewal

org.apache.hadoop.hdfs.DFSClient$LeaseChecker

org.apache.hadoop.hdfs.LeaseRenewer

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