How to use

getCurrentlyBlockedTasks

method

in

org.apache.cassandra.concurrent.JMXEnabledThreadPoolExecutorMBean

tpObj.put("pending", threadPoolProxy.getPendingTasks());
tpObj.put("completed", threadPoolProxy.getCompletedTasks());
tpObj.put("blocked", threadPoolProxy.getCurrentlyBlockedTasks());
tpObj.put("total blocked", threadPoolProxy.getTotalBlockedTasks());
threadPoolArray.put(tpObj);

  @Override
  public void execute(NodeProbe probe)
  {
    System.out.printf("%-25s%10s%10s%15s%10s%18s%n", "Pool Name", "Active", "Pending", "Completed", "Blocked", "All time blocked");
    Iterator<Map.Entry<String, JMXEnabledThreadPoolExecutorMBean>> threads = probe.getThreadPoolMBeanProxies();
    while (threads.hasNext())
    {
      Map.Entry<String, JMXEnabledThreadPoolExecutorMBean> thread = threads.next();
      String poolName = thread.getKey();
      JMXEnabledThreadPoolExecutorMBean threadPoolProxy = thread.getValue();
      System.out.printf("%-25s%10s%10s%15s%10s%18s%n",
          poolName,
          threadPoolProxy.getActiveCount(),
          threadPoolProxy.getPendingTasks(),
          threadPoolProxy.getCompletedTasks(),
          threadPoolProxy.getCurrentlyBlockedTasks(),
          threadPoolProxy.getTotalBlockedTasks());
    }
    System.out.printf("%n%-20s%10s%n", "Message type", "Dropped");
    for (Map.Entry<String, Integer> entry : probe.getDroppedMessages().entrySet())
      System.out.printf("%-20s%10s%n", entry.getKey(), entry.getValue());
  }
}

/**
 * Get the status of all thread pools.
 *
 * @return thread pools info list
 */
public List<TPStatsInfo> getTPStats() {
  List<TPStatsInfo> tpstats = new ArrayList<>();
  Iterator<Map.Entry<String, JMXEnabledThreadPoolExecutorMBean>> threads = nodeProbe.getThreadPoolMBeanProxies();
  while (threads.hasNext()) {
    Map.Entry<String, JMXEnabledThreadPoolExecutorMBean> thread = threads.next();
    JMXEnabledThreadPoolExecutorMBean threadPoolProxy = thread.getValue();
    tpstats.add(new TPStatsInfo(thread.getKey(), threadPoolProxy.getActiveCount(),
        threadPoolProxy.getPendingTasks(), threadPoolProxy.getCompletedTasks(),
        threadPoolProxy.getCurrentlyBlockedTasks(), threadPoolProxy.getTotalBlockedTasks()));
  }
  return tpstats;
}

/**
 * Get the status of all thread pools.
 *
 * @return thread pools info list
 */
public List<TPStatsInfo> getTPStats() {
  List<TPStatsInfo> tpstats = new ArrayList<>();
  Iterator<Map.Entry<String, JMXEnabledThreadPoolExecutorMBean>> threads = nodeProbe.getThreadPoolMBeanProxies();
  while (threads.hasNext()) {
    Map.Entry<String, JMXEnabledThreadPoolExecutorMBean> thread = threads.next();
    JMXEnabledThreadPoolExecutorMBean threadPoolProxy = thread.getValue();
    tpstats.add(new TPStatsInfo(thread.getKey(), threadPoolProxy.getActiveCount(),
        threadPoolProxy.getPendingTasks(), threadPoolProxy.getCompletedTasks(),
        threadPoolProxy.getCurrentlyBlockedTasks(), threadPoolProxy.getTotalBlockedTasks()));
  }
  return tpstats;
}

threadPoolProxy.getPendingTasks(),
threadPoolProxy.getCompletedTasks(),
threadPoolProxy.getCurrentlyBlockedTasks(),
threadPoolProxy.getTotalBlockedTasks()));