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https://issues.apache.org/jira/browse/HIVE-18214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16322113#comment-16322113
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Peter Vary commented on HIVE-18214:
-----------------------------------
[~stakiar]: I am happy to remove non-production code from here if we have a
good solution which can be used in case of problems. I seem to remember, that
you mentioned somewhere that it helped debugging remote driver problems. Do we
have a better solution for that?
Thanks,
Peter
> Flaky test: TestSparkClient
> ---------------------------
>
> Key: HIVE-18214
> URL: https://issues.apache.org/jira/browse/HIVE-18214
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Sahil Takiar
> Assignee: Sahil Takiar
> Attachments: HIVE-18214.1.patch, HIVE-18214.2.patch
>
>
> Looks like there is a race condition in {{TestSparkClient#runTest}}. The test
> creates a {{RemoteDriver}} in memory, which creates a {{JavaSparkContext}}. A
> new {{JavaSparkContext}} is created for each test that is run. There is a
> race condition where the {{RemoteDriver}} isn't given enough time to
> shutdown, so when the next test starts running it creates another
> {{JavaSparkContext}} which causes an exception like
> {{org.apache.spark.SparkException: Only one SparkContext may be running in
> this JVM (see SPARK-2243)}}.
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