[FLINK-4089] Ineffective null check in YarnClusterClient#getApplicationStatus()

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.4, 1.1.0
• Assignee: Maximilian Michels
• Reporter: Ted Yu
• Created: 17/Jun/16 17:07
• Updated: 20/Jun/16 15:12
• Resolved: 20/Jun/16 15:12

Description

Here is related code:

    if(pollingRunner == null) {
      LOG.warn("YarnClusterClient.getApplicationStatus() has been called on an uninitialized cluster." +
          "The system might be in an erroneous state");
    }
    ApplicationReport lastReport = pollingRunner.getLastReport();

If pollingRunner is null, NPE would result from the getLastReport() call.