Package org.apache.accumulo.server.zookeeper

Examples of org.apache.accumulo.server.zookeeper.ZooLock$LockWatcher

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    String addressString = AddressUtil.toString(addr);
    String zPath = ZooUtil.getRoot(instance) + Constants.ZTSERVERS + "/" + addressString;
    ZooReaderWriter zoo = ZooReaderWriter.getInstance();
    zoo.putPersistentData(zPath, new byte[] {}, NodeExistsPolicy.SKIP);
   
    ZooLock zlock = new ZooLock(zPath);
   
    LockWatcher lw = new LockWatcher() {
      @Override
      public void lostLock(final LockLossReason reason) {
        try {
          tch.halt(Tracer.traceInfo(), null, null);
        } catch (Exception ex) {
          log.error(ex, ex);
          System.exit(1);
        }
      }
     
      @Override
      public void unableToMonitorLockNode(Throwable e) {
        try {
          tch.halt(Tracer.traceInfo(), null, null);
        } catch (Exception ex) {
          log.error(ex, ex);
          System.exit(1);
        }
      }
    };
   
    byte[] lockContent = new ServerServices(addressString, Service.TSERV_CLIENT).toString().getBytes(Constants.UTF8);
    if (zlock.tryLock(lw, lockContent)) {
      log.debug("Obtained tablet server lock " + zlock.getLockPath());
    }
    // modify !METADATA
    synchronized (tch) {
      while (!tch.halted) {
        tch.wait();
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      }
    };
   
    while (true) {
      lock = new ZooLock(path);
      if (lock.tryLock(lockWatcher, new ServerServices(address, Service.GC_CLIENT).toString().getBytes(Constants.UTF8))) {
        break;
      }
      UtilWaitThread.sleep(1000);
    }
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  @Override
  public void run() throws Exception {
    String zPath = ZooUtil.getRoot(HdfsZooInstance.getInstance()) + "/testLock";
    IZooReaderWriter zoo = ZooReaderWriter.getInstance();
    zoo.putPersistentData(zPath, new byte[0], NodeExistsPolicy.OVERWRITE);
    ZooLock zl = new ZooLock(zPath);
    boolean gotLock = zl.tryLock(new LockWatcher() {
     
      @Override
      public void lostLock(LockLossReason reason) {
        System.exit(-1);
       
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    }

    // Get a ZooLock for the monitor
    while (true) {
      MoniterLockWatcher monitorLockWatcher = new MoniterLockWatcher();
      monitorLock = new ZooLock(monitorLockPath);
      monitorLock.lockAsync(monitorLockWatcher, new byte[0]);

      monitorLockWatcher.waitForChange();

      if (monitorLockWatcher.acquiredLock) {
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    try {
      String zPath = ZooUtil.getRoot(instance) + 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) {
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        Property.MASTER_CLIENTPORT)));
   
    while (true) {
     
      MasterLockWatcher masterLockWatcher = new MasterLockWatcher();
      masterLock = new ZooLock(zMasterLoc);
      masterLock.lockAsync(masterLockWatcher, masterClientAddress.getBytes(Constants.UTF8));

      masterLockWatcher.waitForChange();
     
      if (masterLockWatcher.acquiredLock) {
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    final String masterClientAddress = org.apache.accumulo.core.util.AddressUtil.toString(new InetSocketAddress(hostname, ServerConfiguration
        .getSystemConfiguration().getPort(Property.MASTER_CLIENTPORT)));
   
    boolean locked = false;
    while (System.currentTimeMillis() - current < waitTime) {
      masterLock = new ZooLock(zMasterLoc);
      if (masterLock.tryLock(masterLockWatcher, masterClientAddress.getBytes())) {
        locked = true;
        break;
      }
      UtilWaitThread.sleep(TIME_TO_WAIT_BETWEEN_LOCK_CHECKS);
    }
    if (!locked) {
      log.info("Failed to get master lock, even after waiting for session timeout, becoming back-up server");
      while (true) {
        masterLock = new ZooLock(zMasterLoc);
        if (masterLock.tryLock(masterLockWatcher, masterClientAddress.getBytes())) {
          break;
        }
        UtilWaitThread.sleep(TIME_TO_WAIT_BETWEEN_LOCK_CHECKS);
      }
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      }
    };
   
    while (true) {
      lock = new ZooLock(path);
      if (lock.tryLock(lockWatcher, new ServerServices(address, Service.GC_CLIENT).toString().getBytes())) {
        break;
      }
      UtilWaitThread.sleep(1000);
    }
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    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) {
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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) {
        System.exit(-1);
       
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Related Classes of org.apache.accumulo.server.zookeeper.ZooLock$LockWatcher

  • org.apache.accumulo.core.zookeeper.ZooUtil.LockID
  • org.apache.accumulo.gc.SimpleGarbageCollector
  • org.apache.accumulo.master.Master
  • org.apache.accumulo.monitor.Monitor
  • org.apache.accumulo.server.gc.SimpleGarbageCollector
  • org.apache.accumulo.server.master.LiveTServerSet
  • org.apache.accumulo.server.master.Master
  • org.apache.accumulo.server.monitor.Monitor
  • org.apache.accumulo.server.tabletserver.TabletServer
  • org.apache.accumulo.server.test.functional.SplitRecoveryTest
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