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https://issues.apache.org/jira/browse/FLINK-5147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15725708#comment-15725708
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Ufuk Celebi commented on FLINK-5147:
------------------------------------
Ocurred again https://api.travis-ci.org/jobs/181647649/log.txt?deansi=true
> StreamingOperatorsITCase.testGroupedFoldOperation failed on Travis
> ------------------------------------------------------------------
>
> Key: FLINK-5147
> URL: https://issues.apache.org/jira/browse/FLINK-5147
> Project: Flink
> Issue Type: Bug
> Components: Tests
> Affects Versions: 1.1.3
> Environment: https://travis-ci.org/apache/flink/jobs/177675906
> Reporter: Chesnay Schepler
> Assignee: Chesnay Schepler
>
> The test failed with the following exception:
> {code}
> testGroupedFoldOperation(org.apache.flink.test.streaming.api.StreamingOperatorsITCase)
> Time elapsed: 0.573 sec <<< ERROR!
> org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
> at
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply$mcV$sp(JobManager.scala:905)
> at
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:848)
> at
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:848)
> at
> scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
> at
> scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
> at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
> at
> akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401)
> at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> at
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> at
> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> Caused by: java.lang.NullPointerException: null
> at
> org.apache.flink.core.fs.local.LocalFileSystem.delete(LocalFileSystem.java:187)
> at
> org.apache.flink.core.fs.FileSystem.initOutPathLocalFS(FileSystem.java:632)
> at
> org.apache.flink.api.common.io.FileOutputFormat.open(FileOutputFormat.java:239)
> at
> org.apache.flink.api.java.io.TextOutputFormat.open(TextOutputFormat.java:78)
> at
> org.apache.flink.streaming.api.functions.sink.OutputFormatSinkFunction.open(OutputFormatSinkFunction.java:60)
> at
> org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:36)
> at
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.open(AbstractUdfStreamOperator.java:154)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.openAllOperators(StreamTask.java:383)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:259)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:650)
> at java.lang.Thread.run(Thread.java:745)
> testGroupedFoldOperation(org.apache.flink.test.streaming.api.StreamingOperatorsITCase)
> Time elapsed: 0.573 sec <<< FAILURE!
> java.lang.AssertionError: Different number of lines in expected and obtained
> result. expected:<4> but was:<1>
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.failNotEquals(Assert.java:834)
> at org.junit.Assert.assertEquals(Assert.java:645)
> at
> org.apache.flink.test.util.TestBaseUtils.compareResultsByLinesInMemory(TestBaseUtils.java:316)
> at
> org.apache.flink.test.util.TestBaseUtils.compareResultsByLinesInMemory(TestBaseUtils.java:302)
> at
> org.apache.flink.test.streaming.api.StreamingOperatorsITCase.after(StreamingOperatorsITCase.java:63)
> {code}
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