Examples of org.apache.hadoop.util.Daemon

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

      LOG.debug("Running " + GenericTestUtils.getMethodName());
    }
    DataNode spyDN = spy(dn);
    doThrow(new IOException()).
       when(spyDN).initReplicaRecovery(any(RecoveringBlock.class));
    Daemon d = spyDN.recoverBlocks("fake NN", initRecoveringBlocks());
    d.join();
    verify(spyDN, never()).syncBlock(
        any(RecoveringBlock.class), anyListOf(BlockRecord.class));
  }

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    }
    DataNode spyDN = spy(dn);
    doReturn(new ReplicaRecoveryInfo(block.getBlockId(), 0,
        block.getGenerationStamp(), ReplicaState.FINALIZED)).when(spyDN).
        initReplicaRecovery(any(RecoveringBlock.class));
    Daemon d = spyDN.recoverBlocks("fake NN", initRecoveringBlocks());
    d.join();
    DatanodeProtocol dnP = dn.getActiveNamenodeForBP(POOL_ID);
    verify(dnP).commitBlockSynchronization(
        block, RECOVERY_ID, 0, true, true, DatanodeID.EMPTY_ARRAY, null);
  }

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      if (nonSequentialWriteInMemory.get() >= DUMP_WRITE_WATER_MARK) {
        if (LOG.isDebugEnabled()) {
          LOG.debug("Asking dumper to dump...");
        }
        if (dumpThread == null) {
          dumpThread = new Daemon(new Dumper());
          dumpThread.start();
        } else {
          this.notifyAll();          
        }
      }

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                                     tmpPort);
    this.dnRegistration.setName(machineName + ":" + tmpPort);
    LOG.info("Opened info server at " + tmpPort);
      
    this.threadGroup = new ThreadGroup("dataXceiverServer");
    this.dataXceiverServer = new Daemon(threadGroup, 
        new DataXceiverServer(ss, conf, this));
    this.threadGroup.setDaemon(true); // auto destroy when empty


    this.blockReportInterval =
      conf.getLong("dfs.blockreport.intervalMsec", BLOCKREPORT_INTERVAL);

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        // start block scanner
        if (blockScanner != null && blockScannerThread == null &&
            upgradeManager.isUpgradeCompleted()) {
          LOG.info("Starting Periodic block scanner.");
          blockScannerThread = new Daemon(blockScanner);
          blockScannerThread.start();
        }
            
        //
        // There is no work to do;  sleep until hearbeat timer elapses,

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          }
          String xfersTo = xfersBuilder.toString();
          LOG.info(dnRegistration + " Starting thread to transfer block " + 
                   blocks[i] + " to " + xfersTo);                       
        }
        new Daemon(new DataTransfer(xferTargets[i], blocks[i], this)).start();
      }
    }
  }

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    data.validateBlockMetadata(stored);
    return info;
  }


  public Daemon recoverBlocks(final Block[] blocks, final DatanodeInfo[][] targets) {
    Daemon d = new Daemon(threadGroup, new Runnable() {
      /** Recover a list of blocks. It is run by the primary datanode. */
      public void run() {
        for(int i = 0; i < blocks.length; i++) {
          try {
            logRecoverBlock("NameNode", blocks[i], targets[i]);
            recoverBlock(blocks[i], false, targets[i], true);
          } catch (IOException e) {
            LOG.warn("recoverBlocks FAILED, blocks[" + i + "]=" + blocks[i], e);
          }
        }
      }
    });
    d.start();
    return d;
  }

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                                        -1) * 1000L);
    if (isAccessTokenEnabled) {
      accessTokenHandler = new BlockTokenSecretManager(true,
          accessKeyUpdateInterval, accessTokenLifetime);
    }
    this.hbthread = new Daemon(new HeartbeatMonitor());
    this.lmthread = new Daemon(leaseManager.new Monitor());
    this.replmon = new ReplicationMonitor();
    this.replthread = new Daemon(replmon);
    hbthread.start();
    lmthread.start();
    replthread.start();


    this.hostsReader = new HostsFileReader(conf.get("dfs.hosts",""),
                                           conf.get("dfs.hosts.exclude",""));
    this.dnthread = new Daemon(new DecommissionManager(this).new Monitor(
        conf.getInt("dfs.namenode.decommission.interval", 30),
        conf.getInt("dfs.namenode.decommission.nodes.per.interval", 5)));
    dnthread.start();


    this.dnsToSwitchMapping = ReflectionUtils.newInstance(

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        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);
    }

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                                     tmpPort);
    this.dnRegistration.setName(machineName + ":" + tmpPort);
    LOG.info("Opened info server at " + tmpPort);
      
    this.threadGroup = new ThreadGroup("dataXceiverServer");
    this.dataXceiverServer = new Daemon(threadGroup, 
        new DataXceiverServer(ss, conf, this));
    this.threadGroup.setDaemon(true); // auto destroy when empty


    this.blockReportInterval =
      conf.getLong("dfs.blockreport.intervalMsec", BLOCKREPORT_INTERVAL);

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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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