Alexander Pivovarov created TEZ-1632:
----------------------------------------

             Summary: NPE at TestPreemption.testPreemptionWithoutSession line 
105
                 Key: TEZ-1632
                 URL: https://issues.apache.org/jira/browse/TEZ-1632
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Alexander Pivovarov
            Assignee: Alexander Pivovarov


Some issues with multithreading
mockApp.getContext().getCurrentDAG() returns non-null value after 200-300ms.

{code}
$ mvn clean package
...
Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 9.566 sec <<< 
FAILURE!
testPreemptionWithoutSession(org.apache.tez.dag.app.TestPreemption)  Time 
elapsed: 0.182 sec  <<< ERROR!
java.lang.NullPointerException: null
        at 
org.apache.tez.dag.app.TestPreemption.testPreemptionWithoutSession(TestPreemption.java:105)

Running org.apache.tez.client.TestLocalMode
{code}




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