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https://issues.apache.org/jira/browse/FLINK-36298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17897324#comment-17897324
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Weijie Guo commented on FLINK-36298:
------------------------------------
It seems that this problem has not appeared recently, I am not sure if it has
been fixed.
> NullPointerException in Calcite causes a PyFlink test failure
> -------------------------------------------------------------
>
> Key: FLINK-36298
> URL: https://issues.apache.org/jira/browse/FLINK-36298
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Affects Versions: 2.0-preview
> Reporter: Matthias Pohl
> Priority: Blocker
> Labels: test-stability
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=62146&view=logs&j=b53e1644-5cb4-5a3b-5d48-f523f39bcf06&t=b68c9f5c-04c9-5c75-3862-a3a27aabbce3&l=25458
> {code}
> java.lang.NullPointerException: metadataHandlerProvider
> Sep 15 03:14:04 E at
> java.base/java.util.Objects.requireNonNull(Objects.java:235)
> Sep 15 03:14:04 E at
> org.apache.calcite.rel.metadata.RelMetadataQueryBase.getMetadataHandlerProvider(RelMetadataQueryBase.java:122)
> Sep 15 03:14:04 E at
> org.apache.calcite.rel.metadata.RelMetadataQueryBase.revise(RelMetadataQueryBase.java:118)
> Sep 15 03:14:04 E at
> org.apache.calcite.rel.metadata.RelMetadataQuery.getNonCumulativeCost(RelMetadataQuery.java:333)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.getCost(VolcanoPlanner.java:727)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.getCostOrInfinite(VolcanoPlanner.java:714)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.propagateCostImprovements(VolcanoPlanner.java:971)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.addRelToSet(VolcanoPlanner.java:1408)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.registerImpl(VolcanoPlanner.java:1368)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.register(VolcanoPlanner.java:598)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:613)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:95)
> Sep 15 03:14:04 E at
> org.apache.calcite.rel.AbstractRelNode.onRegister(AbstractRelNode.java:274)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.registerImpl(VolcanoPlanner.java:1270)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.register(VolcanoPlanner.java:598)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:613)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:95)
> Sep 15 03:14:04 E at
> org.apache.calcite.rel.AbstractRelNode.onRegister(AbstractRelNode.java:274)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.registerImpl(VolcanoPlanner.java:1270)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.register(VolcanoPlanner.java:598)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:613)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:95)
> Sep 15 03:14:04 E at
> org.apache.calcite.rel.AbstractRelNode.onRegister(AbstractRelNode.java:274)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.registerImpl(VolcanoPlanner.java:1270)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.register(VolcanoPlanner.java:598)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:613)
> Sep 15 03:14:04 E at
> org.apache.calcite.plan.volcano.VolcanoPlanner.changeTraits(VolcanoPlanner.java:498)
> Sep 15 03:14:04 E at
> org.apache.calcite.tools.Programs$RuleSetProgram.run(Programs.java:315)
> Sep 15 03:14:04 E at
> org.apache.flink.table.planner.plan.optimize.program.FlinkVolcanoProgram.optimize(FlinkVolcanoProgram.scala:62)
> Sep 15 03:14:04 E at
> org.apache.flink.table.planner.plan.optimize.program.FlinkChainedProgram.$anonfun$optimize$1(FlinkChainedProgram.scala:59)
> [...]
> {code}
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