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https://issues.apache.org/jira/browse/DRILL-8228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17539924#comment-17539924
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ASF GitHub Bot commented on DRILL-8228:
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jnturton commented on PR #2554:
URL: https://github.com/apache/drill/pull/2554#issuecomment-1132459141
Hi @nielsbasjes don't worry, everyone was a bit mystified by this one! Your
PR didn't introduce the bug, it only revealed an existing bug via an accident.
It _seems_ like the unit test that @vdiravka fixed here was only ever working
because a race condition affecting test initialisation kept turning out in its
favour by good luck. We think that by adding some unrelated tests, your PR
shifted Maven / Surefire's overall unit test scheduling so that this test's run
of luck came to an end and its buggy initialisation was revealed.
> Drill2288GetColumnsMetadataWhenNoRowsTest regression
> ----------------------------------------------------
>
> Key: DRILL-8228
> URL: https://issues.apache.org/jira/browse/DRILL-8228
> Project: Apache Drill
> Issue Type: Sub-task
> Reporter: Vitalii Diravka
> Assignee: Vitalii Diravka
> Priority: Major
> Labels: backport-to-stable
>
> Drill2288GetColumnsMetadataWhenNoRowsTest starts to fail after DRILL-8225
> {code:java}
> Error: Failures:
> Error: Drill2288GetColumnsMetadataWhenNoRowsTest Multiple Failures (2
> failures)
> java.lang.NullPointerException: Cannot invoke
> "java.io.File.getAbsolutePath()" because the return value of
> "org.apache.drill.test.BaseDirTestWatcher.getTmpDir()" is null
> java.lang.NullPointerException: Cannot invoke
> "java.sql.Connection.close()" because
> "org.apache.drill.jdbc.test.Drill2288GetColumnsMetadataWhenNoRowsTest.connection"
> is null
> {code}
> https://github.com/apache/drill/runs/6499401042?check_suite_focus=true
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