Package org.apache.hadoop.hbase.executor

Examples of org.apache.hadoop.hbase.executor.RegionTransitionData

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            watcher.assignmentZNode);
        if (children != null) {
          Stat stat = new Stat();
          for (String child : children) {
            stat.setVersion(0);
            RegionTransitionData data = ZKAssign.getDataAndWatch(watcher,
                ZKUtil.joinZNode(watcher.assignmentZNode, child), stat);
            // See HBASE-7551, handle splitting here as well, in case we miss the node change event
            if (stat.getVersion() > 0 && data.getEventType() == EventType.RS_ZK_REGION_SPLITTING) {
              handleRegion(data, stat.getVersion());
            }
          }
        }
      } catch(KeeperException e) {
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   */
  private boolean isSplitOrSplitting(final String path) throws KeeperException {
    boolean result = false;
    // This may fail if the SPLIT or SPLITTING znode gets cleaned up before we
    // can get data from it.
    RegionTransitionData data = ZKAssign.getData(master.getZooKeeper(), path);
    EventType evt = data.getEventType();
    switch (evt) {
    case RS_ZK_REGION_SPLIT:
    case RS_ZK_REGION_SPLITTING:
      result = true;
      break;
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          HRegionInfo regionInfo = region.getFirst();
          Result result = region.getSecond();
          // If region was in transition (was in zk) force it offline for
          // reassign
          try {
            RegionTransitionData data = ZKAssign.getData(watcher,
                regionInfo.getEncodedName());

            // If zk node of this region has been updated by a live server,
            // we consider that this region is being handled.
            // So we should skip it and process it in
            // processRegionsInTransition.
            if (data != null && data.getOrigin() != null &&
                serverManager.isServerOnline(data.getOrigin())) {
              LOG.info("The region " + regionInfo.getEncodedName()
                  + "is being handled on " + data.getOrigin());
              continue;
            }
            // Process with existing RS shutdown code
            boolean assign = ServerShutdownHandler.processDeadRegion(
                regionInfo, result, this, this.catalogTracker);
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        + regionInfo.getRegionNameAsString());
    // Should have a ZK node in OPENING state
    try {
      String node = ZKAssign.getNodeName(watcher, regionInfo.getEncodedName());
      Stat stat = new Stat();
      RegionTransitionData dataInZNode = ZKAssign.getDataNoWatch(watcher, node,
          stat);
      if (dataInZNode == null) {
        LOG.warn("Data is null, node " + node + " no longer exists");
        return;
      }
      if (dataInZNode.getEventType() == EventType.RS_ZK_REGION_OPENED) {
        LOG.debug("Region has transitioned to OPENED, allowing "
            + "watched event handlers to process");
        return;
      } else if (dataInZNode.getEventType() != EventType.RS_ZK_REGION_OPENING &&
          dataInZNode.getEventType() != EventType.RS_ZK_REGION_FAILED_OPEN ) {
        LOG.warn("While timing out a region in state OPENING, "
            + "found ZK node in unexpected state: "
            + dataInZNode.getEventType());
        return;
      }
      invokeAssign(regionInfo);
    } catch (KeeperException ke) {
      LOG.error("Unexpected ZK exception timing out CLOSING region", ke);
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   * The AM's info could be old when OpenedRegionHandler
   * processing hasn't finished yet when server shutdown occurs.
   * @return whether the serverName currently hosts the region
   */
  public boolean isCarryingRegion(ServerName serverName, HRegionInfo hri) {
    RegionTransitionData data = null;
    try {
      data = ZKAssign.getData(master.getZooKeeper(), hri.getEncodedName());
    } catch (KeeperException e) {
      master.abort("Unexpected ZK exception reading unassigned node for region="
        + hri.getEncodedName(), e);
    }

    ServerName addressFromZK = (data != null && data.getOrigin() != null) ?
      data.getOrigin() : null;
    if (addressFromZK != null) {
      // if we get something from ZK, we will use the data
      boolean matchZK = (addressFromZK != null &&
        addressFromZK.equals(serverName));
      LOG.debug("based on ZK, current region=" + hri.getRegionNameAsString() +
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      String path = ZKAssign.getNodeName(t.getConnection().getZooKeeperWatcher(),
        hri.getEncodedName());
      Stat stats =
        t.getConnection().getZooKeeperWatcher().getRecoverableZooKeeper().exists(path, false);
      LOG.info("EPHEMERAL NODE BEFORE SERVER ABORT, path=" + path + ", stats=" + stats);
      RegionTransitionData rtd =
        ZKAssign.getData(t.getConnection().getZooKeeperWatcher(),
          hri.getEncodedName());
      // State could be SPLIT or SPLITTING.
      assertTrue(rtd.getEventType().equals(EventType.RS_ZK_REGION_SPLIT) ||
        rtd.getEventType().equals(EventType.RS_ZK_REGION_SPLITTING));
      // Now crash the server
      cluster.abortRegionServer(tableRegionIndex);
      waitUntilRegionServerDead();
      awaitDaughters(tableName, daughters.size());
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          .getZooKeeperWatcher(), hri.getEncodedName());
      Stat stats = t.getConnection().getZooKeeperWatcher()
          .getRecoverableZooKeeper().exists(path, false);
      LOG.info("EPHEMERAL NODE BEFORE SERVER ABORT, path=" + path + ", stats="
          + stats);
      RegionTransitionData rtd = ZKAssign.getData(t.getConnection()
          .getZooKeeperWatcher(), hri.getEncodedName());
      // State could be SPLIT or SPLITTING.
      assertTrue(rtd.getEventType().equals(EventType.RS_ZK_REGION_SPLIT)
          || rtd.getEventType().equals(EventType.RS_ZK_REGION_SPLITTING));


      // abort and wait for new master.
      MockMasterWithoutCatalogJanitor master = abortAndWaitForMaster();
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         new CloseRegionHandler(server, rss, hri, false, true,
         versionOfClosingNode+1);
       handler.process();
  
       // Handler should remain in M_ZK_REGION_CLOSING
       RegionTransitionData data =
         ZKAssign.getData(server.getZooKeeper(), hri.getEncodedName());
       assertTrue(EventType.M_ZK_REGION_CLOSING == data.getEventType());
     }
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       CloseRegionHandler handler =
         new CloseRegionHandler(server, rss, hri, false, true,
         versionOfClosingNode);
       handler.process();
       // Handler should have transitioned it to RS_ZK_REGION_CLOSED
       RegionTransitionData data =
         ZKAssign.getData(server.getZooKeeper(), hri.getEncodedName());
       assertTrue(EventType.RS_ZK_REGION_CLOSED == data.getEventType());
     }
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           ZKAssign.createNodeOffline(server.getZooKeeper(), hri,
             server.getServerName());
           OpenRegionHandler openHandler = new OpenRegionHandler(server, rss, hri,
             htd);
           openHandler.process();
           RegionTransitionData data =
             ZKAssign.getData(server.getZooKeeper(), hri.getEncodedName());
      
           // delete the node, which is what Master do after the region is opened
           ZKAssign.deleteNode(server.getZooKeeper(), hri.getEncodedName(),
             EventType.RS_ZK_REGION_OPENED);
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Related Classes of org.apache.hadoop.hbase.executor.RegionTransitionData

  • org.apache.hadoop.hbase.master.AssignmentManager
  • org.apache.hadoop.hbase.master.AssignmentManager$TimeoutMonitor
  • org.apache.hadoop.hbase.master.TestAssignmentManager
  • org.apache.hadoop.hbase.master.TestMasterFailover
  • org.apache.hadoop.hbase.regionserver.handler.TestCloseRegionHandler
  • org.apache.hadoop.hbase.regionserver.handler.TestOpenRegionHandler
  • org.apache.hadoop.hbase.regionserver.SplitTransaction
  • org.apache.hadoop.hbase.regionserver.TestSplitTransactionOnCluster
  • org.apache.hadoop.hbase.util.TestHBaseFsck
  • org.apache.hadoop.hbase.zookeeper.ZKAssign
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