Examples of org.apache.hadoop.hbase.SplitLogTask$Unassigned

org.apache.hadoop.hbase.SplitLogTask
State of a WAL log split during distributed splitting. State is kept up in zookeeper. Encapsulates protobuf serialization/deserialization so we don't leak generated pb outside of this class. Used by regionserver and master packages.
Immutable

    TaskBatch batch = new TaskBatch();


    String tasknode = submitTaskAndWait(batch, "foo/1");
    final ServerName worker1 = new ServerName("worker1,1,1");


    SplitLogTask slt = new SplitLogTask.Owned(worker1);
    ZKUtil.setData(zkw, tasknode, slt.toByteArray());
    if (tot_mgr_heartbeat.get() == 0) waitForCounter(tot_mgr_heartbeat, 0, 1, to/2);


    // Not yet resubmitted.
    Assert.assertEquals(0, tot_mgr_resubmit.get());

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      List<String> tasks = ZKUtil.listChildrenNoWatch(watcher, watcher.splitLogZNode);
      if (tasks != null) {
        for (String t : tasks) {
          byte[] data = ZKUtil.getData(this.watcher, ZKUtil.joinZNode(watcher.splitLogZNode, t));
          if (data != null) {
            SplitLogTask slt = null;
            try {
              slt = SplitLogTask.parseFrom(data);
            } catch (DeserializationException e) {
              LOG.warn("Failed parse data for znode " + t, e);
            }
            if (slt != null && slt.isDone()) {
              continue;
            }
          }
          // decode the file name
          t = ZKSplitLog.getFileName(t);

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    deleteNode(path, zkretries);
    return;
  }


  private void createNode(String path, Long retry_count) {
    SplitLogTask slt = new SplitLogTask.Unassigned(serverName);
    ZKUtil.asyncCreate(this.watcher, path, slt.toByteArray(), new CreateAsyncCallback(), retry_count);
    SplitLogCounters.tot_mgr_node_create_queued.incrementAndGet();
    return;
  }

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      LOG.fatal("logic error - got null data " + path);
      setDone(path, FAILURE);
      return;
    }
    data = this.watcher.getRecoverableZooKeeper().removeMetaData(data);
    SplitLogTask slt = SplitLogTask.parseFrom(data);
    if (slt.isUnassigned()) {
      LOG.debug("task not yet acquired " + path + " ver = " + version);
      handleUnassignedTask(path);
    } else if (slt.isOwned()) {
      heartbeat(path, version, slt.getServerName());
    } else if (slt.isResigned()) {
      LOG.info("task " + path + " entered state: " + slt.toString());
      resubmitOrFail(path, FORCE);
    } else if (slt.isDone()) {
      LOG.info("task " + path + " entered state: " + slt.toString());
      if (taskFinisher != null && !ZKSplitLog.isRescanNode(watcher, path)) {
        if (taskFinisher.finish(slt.getServerName(), ZKSplitLog.getFileName(path)) == Status.DONE) {
          setDone(path, SUCCESS);
        } else {
          resubmitOrFail(path, CHECK);
        }
      } else {
        setDone(path, SUCCESS);
      }
    } else if (slt.isErr()) {
      LOG.info("task " + path + " entered state: " + slt.toString());
      resubmitOrFail(path, CHECK);
    } else {
      LOG.fatal("logic error - unexpected zk state for path = " + path + " data = " + slt.toString());
      setDone(path, FAILURE);
    }
  }

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    }
    LOG.info("resubmitting task " + path);
    task.incarnation++;
    try {
      // blocking zk call but this is done from the timeout thread
      SplitLogTask slt = new SplitLogTask.Unassigned(this.serverName);
      if (ZKUtil.setData(this.watcher, path, slt.toByteArray(), version) == false) {
        LOG.debug("failed to resubmit task " + path +
            " version changed");
        task.heartbeatNoDetails(EnvironmentEdgeManager.currentTimeMillis());
        return false;
      }

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    // created in the DONE state. This behavior prevents a buildup
    // of RESCAN nodes. But there is also a chance that a SplitLogWorker
    // might miss the watch-trigger that creation of RESCAN node provides.
    // Since the TimeoutMonitor will keep resubmitting UNASSIGNED tasks
    // therefore this behavior is safe.
    SplitLogTask slt = new SplitLogTask.Done(this.serverName);
    this.watcher.getRecoverableZooKeeper().getZooKeeper().
      create(ZKSplitLog.getRescanNode(watcher), slt.toByteArray(),
        Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL_SEQUENTIAL,
        new CreateRescanAsyncCallback(), Long.valueOf(retries));
  }

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    TaskBatch batch = new TaskBatch();


    String tasknode = submitTaskAndWait(batch, "foo/1");


    byte[] data = ZKUtil.getData(zkw, tasknode);
    SplitLogTask slt = SplitLogTask.parseFrom(data);
    LOG.info("Task node created " + slt.toString());
    assertTrue(slt.isUnassigned(DUMMY_MASTER));
  }

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  @Test
  public void testOrphanTaskAcquisition() throws Exception {
    LOG.info("TestOrphanTaskAcquisition");


    String tasknode = ZKSplitLog.getEncodedNodeName(zkw, "orphan/test/slash");
    SplitLogTask slt = new SplitLogTask.Owned(DUMMY_MASTER);
    zkw.getRecoverableZooKeeper().create(tasknode, slt.toByteArray(), Ids.OPEN_ACL_UNSAFE,
        CreateMode.PERSISTENT);


    slm = new SplitLogManager(zkw, conf, stopper, master, DUMMY_MASTER);
    waitForCounter(tot_mgr_orphan_task_acquired, 0, 1, to/2);
    Task task = slm.findOrCreateOrphanTask(tasknode);

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  public void testUnassignedOrphan() throws Exception {
    LOG.info("TestUnassignedOrphan - an unassigned task is resubmitted at" +
        " startup");
    String tasknode = ZKSplitLog.getEncodedNodeName(zkw, "orphan/test/slash");
    //create an unassigned orphan task
    SplitLogTask slt = new SplitLogTask.Unassigned(DUMMY_MASTER);
    zkw.getRecoverableZooKeeper().create(tasknode, slt.toByteArray(), Ids.OPEN_ACL_UNSAFE,
        CreateMode.PERSISTENT);
    int version = ZKUtil.checkExists(zkw, tasknode);


    slm = new SplitLogManager(zkw, conf, stopper, master, DUMMY_MASTER);
    waitForCounter(tot_mgr_orphan_task_acquired, 0, 1, to/2);

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    String tasknode = submitTaskAndWait(batch, "foo/1");
    int version = ZKUtil.checkExists(zkw, tasknode);
    final ServerName worker1 = ServerName.valueOf("worker1,1,1");
    final ServerName worker2 = ServerName.valueOf("worker2,1,1");
    final ServerName worker3 = ServerName.valueOf("worker3,1,1");
    SplitLogTask slt = new SplitLogTask.Owned(worker1);
    ZKUtil.setData(zkw, tasknode, slt.toByteArray());
    waitForCounter(tot_mgr_heartbeat, 0, 1, to/2);
    waitForCounter(tot_mgr_resubmit, 0, 1, to + to/2);
    int version1 = ZKUtil.checkExists(zkw, tasknode);
    assertTrue(version1 > version);
    slt = new SplitLogTask.Owned(worker2);
    ZKUtil.setData(zkw, tasknode, slt.toByteArray());
    waitForCounter(tot_mgr_heartbeat, 1, 2, to/2);
    waitForCounter(tot_mgr_resubmit, 1, 2, to + to/2);
    int version2 = ZKUtil.checkExists(zkw, tasknode);
    assertTrue(version2 > version1);
    slt = new SplitLogTask.Owned(worker3);
    ZKUtil.setData(zkw, tasknode, slt.toByteArray());
    waitForCounter(tot_mgr_heartbeat, 2, 3, to/2);
    waitForCounter(tot_mgr_resubmit_threshold_reached, 0, 1, to + to/2);
    Thread.sleep(to + to/2);
    assertEquals(2L, tot_mgr_resubmit.get() - tot_mgr_resubmit_force.get());
  }

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org.apache.hadoop.hbase.coordination.ZKSplitLogManagerCoordination

org.apache.hadoop.hbase.coordination.ZkSplitLogWorkerCoordination

org.apache.hadoop.hbase.master.SplitLogManager

org.apache.hadoop.hbase.master.TestSplitLogManager

org.apache.hadoop.hbase.regionserver.SplitLogWorker

org.apache.hadoop.hbase.regionserver.TestSplitLogWorker

org.apache.hadoop.hbase.exceptions.DeserializationException

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