[jira] [Created] (YARN-5809) AsyncDispatcher possibly invokes multiple shutdown thread when handling exception

["Jian He (JIRA)" <ji...@apache.org>]

Jian He created YARN-5809:
-----------------------------

             Summary: AsyncDispatcher possibly invokes multiple shutdown thread when handling exception
                 Key: YARN-5809
                 URL: https://issues.apache.org/jira/browse/YARN-5809
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Jian He
            Assignee: Jian He


below code when handling exceptions: it is possible to launch multiple shutdown threads if there are events left in the queue that caused to throw exceptions. 
{code}
    } catch (Throwable t) {
      //TODO Maybe log the state of the queue
      LOG.fatal("Error in dispatcher thread", t);
      // If serviceStop is called, we should exit this thread gracefully.
      if (exitOnDispatchException
          && (ShutdownHookManager.get().isShutdownInProgress()) == false
          && stopped == false) {
        Thread shutDownThread = new Thread(createShutDownThread());
        shutDownThread.setName("AsyncDispatcher ShutDown handler");
        shutDownThread.start();
      }
    }
{code}



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