[YARN-4313] Race condition in MiniMRYarnCluster when getting history server address

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0, 2.7.2, 3.0.0-alpha1
• Target Version/s: 2.8.0, 2.7.2
• Assignee: Jian He
• Reporter: Jian He
• Created: 29/Oct/15 00:07
• Updated: 06/Jan/17 07:33
• Resolved: 30/Oct/15 00:39

Description

Problem in this place when waiting for JHS to be started

        new Thread() {
          public void run() {
            historyServer.start();
          };
        }.start();
        while (historyServer.getServiceState() == STATE.INITED) {
          LOG.info("Waiting for HistoryServer to start...");
          Thread.sleep(1500);
        }

The service state is updated before the service is actually started. See AbstractServic#start. So it's possible that when the while loop breaks, the service is not yet started.