Package org.apache.hadoop.hbase

Examples of org.apache.hadoop.hbase.ClusterStatus


    Collections.sort(backupMasters, new Comparator<ServerName>() {
      public int compare(ServerName s1, ServerName s2) {
        return s1.getServerName().compareTo(s2.getServerName());
      }});

    return new ClusterStatus(VersionInfo.getVersion(),
      this.fileSystemManager.getClusterId(),
      this.serverManager.getOnlineServers(),
      this.serverManager.getDeadServers(),
      this.serverName,
      backupMasters,
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    }

    @Override
    protected boolean doAction() throws Exception {
      HBaseAdmin admin = new HBaseAdmin(util.getConfiguration());
      ClusterStatus status = admin.getClusterStatus();
      return status != null;
    }
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    assertEquals(NUM_MASTERS, masterThreads.size());
    LOG.info("Active master " + activeName);

    // Check that ClusterStatus reports the correct active and backup masters
    assertNotNull(active);
    ClusterStatus status = active.getClusterStatus();
    assertTrue(status.getMaster().equals(activeName));
    assertEquals(2, status.getBackupMastersSize());
    assertEquals(2, status.getBackupMasters().size());

    // attempt to stop one of the inactive masters
    int backupIndex = (activeIndex == 0 ? 1 : activeIndex - 1);
    HMaster master = cluster.getMaster(backupIndex);
    LOG.debug("\n\nStopping a backup master: " + master.getServerName() + "\n");
    cluster.stopMaster(backupIndex, false);
    cluster.waitOnMaster(backupIndex);

    // Verify still one active master and it's the same
    for (int i = 0; i < masterThreads.size(); i++) {
      if (masterThreads.get(i).getMaster().isActiveMaster()) {
        assertTrue(activeName.equals(masterThreads.get(i).getMaster().getServerName()));
        activeIndex = i;
        active = masterThreads.get(activeIndex).getMaster();
      }
    }
    assertEquals(1, numActive);
    assertEquals(2, masterThreads.size());
    int rsCount = masterThreads.get(activeIndex).getMaster().getClusterStatus().getServersSize();
    LOG.info("Active master " + active.getServerName() + " managing " + rsCount +  " regions servers");
    assertEquals(3, rsCount);

    // Check that ClusterStatus reports the correct active and backup masters
    assertNotNull(active);
    status = active.getClusterStatus();
    assertTrue(status.getMaster().equals(activeName));
    assertEquals(1, status.getBackupMastersSize());
    assertEquals(1, status.getBackupMasters().size());

    // kill the active master
    LOG.debug("\n\nStopping the active master " + active.getServerName() + "\n");
    cluster.stopMaster(activeIndex, false);
    cluster.waitOnMaster(activeIndex);

    // wait for an active master to show up and be ready
    assertTrue(cluster.waitForActiveAndReadyMaster());

    LOG.debug("\n\nVerifying backup master is now active\n");
    // should only have one master now
    assertEquals(1, masterThreads.size());

    // and he should be active
    active = masterThreads.get(0).getMaster();
    assertNotNull(active);
    status = active.getClusterStatus();
    ServerName mastername = status.getMaster();
    assertTrue(mastername.equals(active.getServerName()));
    assertTrue(active.isActiveMaster());
    assertEquals(0, status.getBackupMastersSize());
    assertEquals(0, status.getBackupMasters().size());
    int rss = status.getServersSize();
    LOG.info("Active master " + mastername.getServerName() + " managing " +
      rss +  " region servers");
    assertEquals(3, rss);

    // Stop the cluster
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    }

    @Override
    public void perform() throws Exception {
      LOG.info("Unbalancing regions");
      ClusterStatus status = this.cluster.getClusterStatus();
      List<ServerName> victimServers = new LinkedList<ServerName>(status.getServers());
      int targetServerCount = (int)Math.ceil(fractionOfServers * victimServers.size());
      List<byte[]> targetServers = new ArrayList<byte[]>(targetServerCount);
      for (int i = 0; i < targetServerCount; ++i) {
        int victimIx = random.nextInt(victimServers.size());
        String serverName = victimServers.remove(victimIx).getServerName();
        targetServers.add(Bytes.toBytes(serverName));
      }

      List<byte[]> victimRegions = new LinkedList<byte[]>();
      for (ServerName server : victimServers) {
        HServerLoad serverLoad = status.getLoad(server);
        // Ugh.
        List<byte[]> regions = new LinkedList<byte[]>(serverLoad.getRegionsLoad().keySet());
        int victimRegionCount = (int)Math.ceil(fractionOfRegions * regions.size());
        LOG.debug("Removing " + victimRegionCount + " regions from " + server.getServerName());
        for (int i = 0; i < victimRegionCount; ++i) {
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  }

  @Test
  public void testClusterStatus() throws Exception {

    ClusterStatus status = TEST_UTIL.getHBaseClusterInterface()
        .getClusterStatus();
    StorageClusterStatusModel returnedStatus = remoteAdmin.getClusterStatus();
    assertEquals(
        "Region count from cluster status and returned status did not match up. ",
        status.getRegionsCount(), returnedStatus.getRegions());
    assertEquals(
        "Dead server count from cluster status and returned status did not match up. ",
        status.getDeadServers(), returnedStatus.getDeadNodes().size());
  }
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  /**
   * Get region info from local cluster.
   */
  Map<ServerName, List<String>> getDeployedHRIs(HBaseAdmin admin)
    throws IOException {
    ClusterStatus status = admin.getMaster().getClusterStatus();
    Collection<ServerName> regionServers = status.getServers();
    Map<ServerName, List<String>> mm =
        new HashMap<ServerName, List<String>>();
    HConnection connection = admin.getConnection();
    for (ServerName hsi : regionServers) {
      HRegionInterface server =
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    RegionPlacementMaintainer.printAssignmentPlan(currentPlan);
  }

  private void killRandomServerAndVerifyAssignment()
      throws IOException, InterruptedException, KeeperException {
    ClusterStatus oldStatus = TEST_UTIL.getHBaseCluster().getClusterStatus();
    ServerName servers[] = oldStatus.getServers().toArray(new ServerName[10]);
    ServerName serverToKill = null;
    int killIndex = 0;
    Random random = new Random(System.currentTimeMillis());
    ServerName metaServer = TEST_UTIL.getHBaseCluster().getServerHoldingMeta();
    LOG.debug("Server holding meta " + metaServer);
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    assertEquals(NUM_MASTERS, masterThreads.size());
    LOG.info("Active master " + activeName);

    // Check that ClusterStatus reports the correct active and backup masters
    assertNotNull(active);
    ClusterStatus status = active.getClusterStatus();
    assertTrue(status.getMaster().equals(activeName));
    assertEquals(2, status.getBackupMastersSize());
    assertEquals(2, status.getBackupMasters().size());

    // attempt to stop one of the inactive masters
    int backupIndex = (activeIndex == 0 ? 1 : activeIndex - 1);
    HMaster master = cluster.getMaster(backupIndex);
    LOG.debug("\n\nStopping a backup master: " + master.getServerName() + "\n");
    cluster.stopMaster(backupIndex, false);
    cluster.waitOnMaster(backupIndex);

    // Verify still one active master and it's the same
    for (int i = 0; i < masterThreads.size(); i++) {
      if (masterThreads.get(i).getMaster().isActiveMaster()) {
        assertTrue(activeName.equals(masterThreads.get(i).getMaster().getServerName()));
        activeIndex = i;
        active = masterThreads.get(activeIndex).getMaster();
      }
    }
    assertEquals(1, numActive);
    assertEquals(2, masterThreads.size());
    int rsCount = masterThreads.get(activeIndex).getMaster().getClusterStatus().getServersSize();
    LOG.info("Active master " + active.getServerName() + " managing " + rsCount +  " regions servers");
    assertEquals(3, rsCount);

    // Check that ClusterStatus reports the correct active and backup masters
    assertNotNull(active);
    status = active.getClusterStatus();
    assertTrue(status.getMaster().equals(activeName));
    assertEquals(1, status.getBackupMastersSize());
    assertEquals(1, status.getBackupMasters().size());

    // kill the active master
    LOG.debug("\n\nStopping the active master " + active.getServerName() + "\n");
    cluster.stopMaster(activeIndex, false);
    cluster.waitOnMaster(activeIndex);

    // wait for an active master to show up and be ready
    assertTrue(cluster.waitForActiveAndReadyMaster());

    LOG.debug("\n\nVerifying backup master is now active\n");
    // should only have one master now
    assertEquals(1, masterThreads.size());

    // and he should be active
    active = masterThreads.get(0).getMaster();
    assertNotNull(active);
    status = active.getClusterStatus();
    ServerName mastername = status.getMaster();
    assertTrue(mastername.equals(active.getServerName()));
    assertTrue(active.isActiveMaster());
    assertEquals(0, status.getBackupMastersSize());
    assertEquals(0, status.getBackupMasters().size());
    int rss = status.getServersSize();
    LOG.info("Active master " + mastername.getServerName() + " managing " +
      rss +  " region servers");
    assertEquals(3, rss);

    // Stop the cluster
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      Map<byte[], RegionLoad> regionLoadMap =
          new TreeMap<byte[], RegionLoad>(Bytes.BYTES_COMPARATOR);
      regionLoadMap.put(Bytes.toBytes(REGION_KEY), rl);
      when(sl.getRegionsLoad()).thenReturn(regionLoadMap);

      ClusterStatus clusterStatus = mock(ClusterStatus.class);
      when(clusterStatus.getServers()).thenReturn(Arrays.asList(sn));
      when(clusterStatus.getLoad(sn)).thenReturn(sl);

      loadBalancer.setClusterStatus(clusterStatus);
    }
    assertTrue(loadBalancer.loads.get(REGION_KEY) != null);
    assertTrue(loadBalancer.loads.get(REGION_KEY).size() == 15);
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  /**
   * @return cluster status
   */
  public ClusterStatus getClusterStatus() {
    ClusterStatus status = new ClusterStatus();
    status.setHBaseVersion(VersionInfo.getVersion());
    status.setServerInfo(serverManager.serversToServerInfo.values());
    status.setDeadServers(serverManager.deadServers);
    status.setRegionsInTransition(this.regionManager.getRegionsInTransition());
    return status;
  }
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