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https://issues.apache.org/jira/browse/FLINK-37194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17915941#comment-17915941
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Luke Chen commented on FLINK-37194:
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[~yyhx] [~Weijie Guo] , I've figured it out why it failed.
PR is opened: [https://github.com/apache/flink/pull/26048/]
Please take a look. Thanks.
> WatermarkITCase.testAlignedWatermarkBlockUpstream failed
> --------------------------------------------------------
>
> Key: FLINK-37194
> URL: https://issues.apache.org/jira/browse/FLINK-37194
> Project: Flink
> Issue Type: Bug
> Components: API / DataStream
> Affects Versions: 2.1.0
> Reporter: Weijie Guo
> Assignee: xuhuang
> Priority: Major
> Labels: pull-request-available
>
> {code:java}
> Jan 21 04:25:55 04:25:55.721 [ERROR]
> org.apache.flink.test.streaming.api.datastream.WatermarkITCase.testAlignedWatermarkBlockUpstream
> -- Time elapsed: 4.070 s <<< ERROR!
> Jan 21 04:25:55 java.lang.NullPointerException: Cannot invoke
> "java.util.List.size()" because "watermarks" is null
> Jan 21 04:25:55 at
> org.apache.flink.test.streaming.api.datastream.WatermarkITCase.assertOperatorReceivedWatermarkValues(WatermarkITCase.java:1069)
> Jan 21 04:25:55 at
> org.apache.flink.test.streaming.api.datastream.WatermarkITCase.testAlignedWatermarkBlockUpstream(WatermarkITCase.java:160)
> Jan 21 04:25:55 at
> java.base/java.lang.reflect.Method.invoke(Method.java:568)
> Jan 21 04:25:55 at
> java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
> Jan 21 04:25:55 at
> java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
> Jan 21 04:25:55 at
> java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655)
> Jan 21 04:25:55 at
> java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622)
> Jan 21 04:25:55 at
> java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165)
> {code}
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=65543&view=logs&j=5c8e7682-d68f-54d1-16a2-a09310218a49&t=86f654fa-ab48-5c1a-25f4-7e7f6afb9bba&l=8294
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