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https://issues.apache.org/jira/browse/MAPREDUCE-7079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17023318#comment-17023318
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Ahmed Hussein commented on MAPREDUCE-7079:
------------------------------------------
The test case {{TestMRIntermediateDataEncryption}} hangs forever for lack of
entropy.
The problem was reported in another Jira MAPREDUCE-7099.
Since this test case causes failure of an entire module and causes other Junits
to run OOM, the workaround in this patch is to eliminate the problem
temporarily aiming at stabilizing Yetus.
The ideal fix is to increase the entropy of the linux box which is submitted as
a separate Jira HADOOP-16810.
> JobHistory#ServiceStop implementation is incorrect
> --------------------------------------------------
>
> Key: MAPREDUCE-7079
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7079
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Jason Darrell Lowe
> Assignee: Ahmed Hussein
> Priority: Major
> Attachments: 2020-01-10-MRApp-stack-dump.txt,
> 2020-01-10-org.apache.hadoop.mapred.TestMRIntermediateDataEncryption-version-14.txt,
> MAPREDUCE-7079.001.patch, MAPREDUCE-7079.002.patch,
> MAPREDUCE-7079.003.patch, MAPREDUCE-7079.004.patch, MAPREDUCE-7079.005.patch,
> MAPREDUCE-7079.006.patch, MAPREDUCE-7079.007.patch, MAPREDUCE-7079.008.patch,
> MAPREDUCE-7079.009.patch, MAPREDUCE-7079.010.patch
>
>
> {{JobHistory.serviceStop}} skips waiting for the thread pool to terminate.
> The problem is due to incorrect while condition that will evaluate to false
> on the iteration of the loop.
> {code:java}
> scheduledExecutor.shutdown();
> boolean interrupted = false;
> long currentTime = System.currentTimeMillis();
> while (!scheduledExecutor.isShutdown()
> && System.currentTimeMillis() > currentTime + 1000l &&
> !interrupted) {
> try {
> Thread.sleep(20);
> } catch (InterruptedException e) {
> interrupted = true;
> }
> }
> {code}
> The expression "{{System.currentTimeMillis() > currentTime + 1000L}}" is
> false because currentTime was just initialized with
> {{System.currentTimeMillis()}}. As a result the the thread won't wait until
> the executor is terminated. Instead, it will force a shutdown immediately.
> *TestMRIntermediateDataEncryption is failing in precommit builds*
> TestMRIntermediateDataEncryption is either timing out or tearing down the JVM
> which causes the unit tests in jobclient to not pass cleanly during precommit
> builds. From sample precommit console output, note the lack of a test results
> line when the test is run:
> {noformat}
> [INFO] Running org.apache.hadoop.mapred.TestSequenceFileInputFormat
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 4.976
> s - in org.apache.hadoop.mapred.TestSequenceFileInputFormat
> [INFO] Running org.apache.hadoop.mapred.TestMRIntermediateDataEncryption
> [INFO] Running org.apache.hadoop.mapred.TestSpecialCharactersInOutputPath
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 16.659
> s - in org.apache.hadoop.mapred.TestSpecialCharactersInOutputPath
> [...]
> [INFO]
> ------------------------------------------------------------------------
> [INFO] BUILD FAILURE
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Total time: 02:14 h
> [INFO] Finished at: 2018-04-12T04:27:06+00:00
> [INFO] Final Memory: 24M/594M
> [INFO]
> ------------------------------------------------------------------------
> [WARNING] The requested profile "parallel-tests" could not be activated
> because it does not exist.
> [WARNING] The requested profile "native" could not be activated because it
> does not exist.
> [WARNING] The requested profile "yarn-ui" could not be activated because it
> does not exist.
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-surefire-plugin:2.21.0:test (default-test) on
> project hadoop-mapreduce-client-jobclient: There was a timeout or other error
> in the fork -> [Help 1]
> {noformat}
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