[TEZ-2298] Ignore sending failure message, when TaskReporter$HeartbeatCallable is shutdown

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.7.0
• Target Version/s: 0.7.0
• Assignee: Siddharth Seth
• Reporter: Rajesh Balamohan
• Created: 09/Apr/15 11:47
• Updated: 30/Jun/15 04:53
• Resolved: 24/Apr/15 16:44

Description

2015-04-09 03:18:37,002 INFO [TezChild] task.TezTaskRunner: Ignoring the following exception since a previous exception is already registered
java.lang.NullPointerException
        at org.apache.tez.runtime.task.TaskReporter$HeartbeatCallable.access$300(TaskReporter.java:121)
        at org.apache.tez.runtime.task.TaskReporter.taskFailed(TaskReporter.java:383)
        at org.apache.tez.runtime.task.TezTaskRunner.sendFailure(TezTaskRunner.java:265)
        at org.apache.tez.runtime.task.TezTaskRunner.access$600(TezTaskRunner.java:51)
        at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:227)
        at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:171)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
        at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:171)
        at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:167)
        at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

Lot of these messages are seen in logs. Even though it is harmless, this can be very misleading when trying to debug the reason for some other exception.