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https://issues.apache.org/jira/browse/CALCITE-3336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16926140#comment-16926140
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Julian Feinauer commented on CALCITE-3336:
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Thank you [~zabetak] for creating the issue, I added my configuration.
> Intermittent failure of
> PigRelBuilderStyleTest.testImplWithGroupByCountDistinct
> -------------------------------------------------------------------------------
>
> Key: CALCITE-3336
> URL: https://issues.apache.org/jira/browse/CALCITE-3336
> Project: Calcite
> Issue Type: Bug
> Components: pig-adapter
> Affects Versions: 1.21.0
> Environment: +Jenkins environment+
> jdk-11-ea+28
> apache-maven-3.5.2
> Ubuntu 16.04 LTS
> +Local Environment (jfeinauer)+
> java version "1.8.0_181"
> Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
> Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
> Apache Maven 3.6.1 (d66c9c0b3152b2e69ee9bac180bb8fcc8e6af555;
> 2019-04-04T12:00:29-07:00)
> macOS Mojave 10.14.4 (18E226)
> Reporter: Stamatis Zampetakis
> Priority: Major
>
> The following tests fails intermittently with the following stack trace:
> {noformat}
> [ERROR] Tests run: 8, Failures: 0, Errors: 1, Skipped: 4, Time elapsed: 5.518
> s <<< FAILURE! - in org.apache.calcite.test.PigRelBuilderStyleTest
> [ERROR]
> testImplWithGroupByCountDistinct(org.apache.calcite.test.PigRelBuilderStyleTest)
> Time elapsed: 3.82 s <<< ERROR!
> org.apache.pig.impl.logicalLayer.FrontendException: Unable to open iterator
> for alias t
> at
> org.apache.calcite.test.PigRelBuilderStyleTest.assertScriptAndResults(PigRelBuilderStyleTest.java:270)
> at
> org.apache.calcite.test.PigRelBuilderStyleTest.testImplWithGroupByCountDistinct(PigRelBuilderStyleTest.java:167)
> Caused by: org.apache.pig.PigException: Unable to store alias t
> at
> org.apache.calcite.test.PigRelBuilderStyleTest.assertScriptAndResults(PigRelBuilderStyleTest.java:270)
> at
> org.apache.calcite.test.PigRelBuilderStyleTest.testImplWithGroupByCountDistinct(PigRelBuilderStyleTest.java:167)
> Caused by: org.apache.pig.impl.logicalLayer.FrontendException: Error
> processing rule LoadTypeCastInserter
> at
> org.apache.calcite.test.PigRelBuilderStyleTest.assertScriptAndResults(PigRelBuilderStyleTest.java:270)
> at
> org.apache.calcite.test.PigRelBuilderStyleTest.testImplWithGroupByCountDistinct(PigRelBuilderStyleTest.java:167)
> Caused by: java.lang.NullPointerException
> at
> org.apache.calcite.test.PigRelBuilderStyleTest.assertScriptAndResults(PigRelBuilderStyleTest.java:270)
> at
> org.apache.calcite.test.PigRelBuilderStyleTest.testImplWithGroupByCountDistinct(PigRelBuilderStyleTest.java:167)
> {noformat}
> The problem appeared a few times in Jenkins (e.g., in build
> [1330|https://builds.apache.org/job/Calcite-Master/1330/jdk=JDK%2011%20(latest),label_exp=ubuntu&&!cloud-slave&&!H27&&!ubuntu-4/])
> and was observed also by [~julian.feinauer].
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