[jira] [Created] (TAJO-645) Task.Reporter can cause NPE during reporting.

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

Hyunsik Choi created TAJO-645:
---------------------------------

             Summary: Task.Reporter can cause NPE during reporting.
                 Key: TAJO-645
                 URL: https://issues.apache.org/jira/browse/TAJO-645
             Project: Tajo
          Issue Type: Bug
          Components: worker
            Reporter: Hyunsik Choi
            Assignee: Hyunsik Choi
             Fix For: 0.8-incubating


See the title. This problem causes the following error messages.
{noformat}
014-03-03 19:52:27,680 ERROR worker.Task (Task.java:run(687)) - 
java.lang.NullPointerException
	at org.apache.tajo.worker.Task$Reporter$1.run(Task.java:681)
	at java.lang.Thread.run(Thread.java:724)
2014-03-03 19:52:27,689 INFO  worker.Task (Task.java:<init>(181)) - Output File Path: hdfs://localhost:52744/tmp/tajo-hyunsik/staging/q_1393843945346_0001/RESULT/part-01-000000
{noformat}

The main cause is to start the report thread in Task before this.context is initialized as follows:

{code:java}
    this.reporter = new Reporter(taskId, masterProxy);
    this.reporter.startCommunicationThread();
    ...
    this.context = new TaskAttemptContext(systemConf, taskId,
        request.getFragments().toArray(new FragmentProto[request.getFragments().size()]), taskDir);
{code}



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