[jira] [Created] (FLINK-11631) TaskExecutorITCase#testJobReExecutionAfterTaskExecutorTermination unstable on Travis

["Till Rohrmann (JIRA)" <ji...@apache.org>]

Till Rohrmann created FLINK-11631:
-------------------------------------

             Summary: TaskExecutorITCase#testJobReExecutionAfterTaskExecutorTermination unstable on Travis
                 Key: FLINK-11631
                 URL: https://issues.apache.org/jira/browse/FLINK-11631
             Project: Flink
          Issue Type: Bug
          Components: Distributed Coordination, Tests
    Affects Versions: 1.8.0
            Reporter: Till Rohrmann


The {{TaskExecutorITCase#testJobReExecutionAfterTaskExecutorTermination}} is unstable on Travis. It fails with 
{code}
16:12:04.644 [ERROR] testJobReExecutionAfterTaskExecutorTermination(org.apache.flink.runtime.taskexecutor.TaskExecutorITCase)  Time elapsed: 1.257 s  <<< ERROR!
org.apache.flink.util.FlinkException: Could not close resource.
	at org.apache.flink.runtime.taskexecutor.TaskExecutorITCase.teardown(TaskExecutorITCase.java:83)
Caused by: org.apache.flink.util.FlinkException: Error while shutting the TaskExecutor down.
Caused by: org.apache.flink.util.FlinkException: Could not properly shut down the TaskManager services.
Caused by: java.lang.IllegalStateException: NetworkBufferPool is not empty after destroying all LocalBufferPools
{code} 

https://api.travis-ci.org/v3/job/493221318/log.txt

The problem seems to be caused by the {{TaskExecutor}} not properly waiting for the termination of all running {{Tasks}}. Due to this, there is a race condition which causes that not all buffers are returned to the {{BufferPool}}.



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