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https://issues.apache.org/jira/browse/SPARK-9487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15663376#comment-15663376
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Sean Owen commented on SPARK-9487:
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How are you running tests? I'd try to run the tests exactly like Jenkins does
-- try running the whole suite, with same args. It passes on my Macbook modulo
the occasional flaky tests. Until you can get the tests passing with no
changes, yeah it will be pretty hard to proceed to develop changes to the tests.
> Use the same num. worker threads in Scala/Python unit tests
> -----------------------------------------------------------
>
> Key: SPARK-9487
> URL: https://issues.apache.org/jira/browse/SPARK-9487
> Project: Spark
> Issue Type: Improvement
> Components: PySpark, Spark Core, SQL, Tests
> Affects Versions: 1.5.0
> Reporter: Xiangrui Meng
> Labels: starter
> Attachments: ContextCleanerSuiteResults, HeartbeatReceiverSuiteResults
>
>
> In Python we use `local[4]` for unit tests, while in Scala/Java we use
> `local[2]` and `local` for some unit tests in SQL, MLLib, and other
> components. If the operation depends on partition IDs, e.g., random number
> generator, this will lead to different result in Python and Scala/Java. It
> would be nice to use the same number in all unit tests.
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