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https://issues.apache.org/jira/browse/SPARK-26896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-26896.
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Resolution: Not A Problem
> Add maven profiles for running tests with JDK 11
> ------------------------------------------------
>
> Key: SPARK-26896
> URL: https://issues.apache.org/jira/browse/SPARK-26896
> Project: Spark
> Issue Type: Sub-task
> Components: Build
> Affects Versions: 3.0.0
> Reporter: Imran Rashid
> Priority: Major
>
> Running unit tests w/ JDK 11 trips over some issues w/ the new module system.
> These can be worked around with the new {{--add-opens}} etc. commands. I
> think we need to add a build profile for JDK 11 to add some extra args to the
> test runners.
> In particular:
> 1) removal of jaxb from java itself (used in pmml export in mllib)
> 2) Some reflective access which results in failures, eg.
> {noformat}
> Unable to make field jdk.internal.ref.PhantomCleanable
> jdk.internal.ref.PhantomCleanable.prev accessible: module java.base does
> not "opens jdk.internal.ref" to unnamed module
> {noformat}
> 3) Some reflective access which results in warnings (you can add
> {{--illegal-access=warn}} to see all of these).
> All I'm proposing we do here is put in the required handling to make these
> problems go away, not necessarily do the "right" thing by no longer
> referencing these unexposed internals.
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