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https://issues.apache.org/jira/browse/BEAM-9313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17074840#comment-17074840
 ] 

Udi Meiri commented on BEAM-9313:
---------------------------------

Or perhaps Gradle is prematurely cleaning up the tmpdir (such as 
/tmp/groovy-generated-8526855374001831465-tmpdir)

> beam_PostRelease_NightlySnapshot failure due to ClassNotFoundException: 
> org.apache.beam.model.pipeline.v1.StandardWindowFns$SessionsPayload$Enum
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-9313
>                 URL: https://issues.apache.org/jira/browse/BEAM-9313
>             Project: Beam
>          Issue Type: Bug
>          Components: test-failures
>            Reporter: Brian Hulette
>            Assignee: Brian Hulette
>            Priority: Major
>              Labels: currently-failing
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Jenkins: https://builds.apache.org/job/beam_PostRelease_NightlySnapshot/885/
> Gradle: https://scans.gradle.com/s/wbwr4nzluxtlc
> :runners:google-cloud-dataflow-java:runQuickstartJavaDataflow and 
> :runners:google-cloud-dataflow-java:runMobileGamingJavaDataflow are broken 
> with ClassDefNotFound errors like:
> {code}
> INFO: 2020-02-08T11:05:44.038Z: Finished operation 
> WordCount.CountWords/Count.PerElement/Combine.perKey(Count)/GroupByKey/Close  
>      
> Feb 08, 2020 11:05:45 AM 
> org.apache.beam.runners.dataflow.util.MonitoringUtil$LoggingHandler process  
> INFO: 2020-02-08T11:05:44.119Z: Executing operation 
> WordCount.CountWords/Count.PerElement/Combine.perKey(Count)/GroupByKey/Read+WordCount.CountWords/Count.PerElement/Combine.perKey(Count)/Combine.GroupedValues+WordCount.CountWords/Count.PerElement/Combine.perKey(Count)/Combine.GroupedValues/Extract+MapElements/Map+WriteCounts/WriteFiles/RewindowIntoGlobal/Window.Assign+WriteCounts/WriteFiles/WriteUnshardedBundlesToTempFiles/WriteUnshardedBundles+WriteCounts/WriteFiles/GatherTempFileResults/View.AsList/ParDo(ToIsmRecordForGlobalWindow)+WriteCounts/WriteFiles/WriteUnshardedBundlesToTempFiles/GroupUnwritten/Reify+WriteCounts/WriteFiles/WriteUnshardedBundlesToTempFiles/GroupUnwritten/Write
>         
> Feb 08, 2020 11:05:47 AM 
> org.apache.beam.runners.dataflow.util.MonitoringUtil$LoggingHandler process  
> SEVERE: 2020-02-08T11:05:46.096Z: java.lang.NoClassDefFoundError: 
> org/apache/beam/model/pipeline/v1/StandardWindowFns$SessionsPayload$Enum    
>       at 
> org.apache.beam.runners.dataflow.worker.repackaged.org.apache.beam.runners.core.construction.WindowingStrategyTranslation.<clinit>(WindowingStrategyTranslation.java:211)
>     
>       at 
> org.apache.beam.runners.dataflow.worker.GroupAlsoByWindowParDoFnFactory.deserializeWindowingStrategy(GroupAlsoByWindowParDoFnFactory.java:234)
>        
>       at 
> org.apache.beam.runners.dataflow.worker.GroupAlsoByWindowParDoFnFactory.create(GroupAlsoByWindowParDoFnFactory.java:99)
>       
>       at 
> org.apache.beam.runners.dataflow.worker.DefaultParDoFnFactory.create(DefaultParDoFnFactory.java:75)
>   
>       at 
> org.apache.beam.runners.dataflow.worker.IntrinsicMapTaskExecutorFactory.createParDoOperation(IntrinsicMapTaskExecutorFactory.java:264)
>        
>       at 
> org.apache.beam.runners.dataflow.worker.IntrinsicMapTaskExecutorFactory.access$000(IntrinsicMapTaskExecutorFactory.java:86)
>   
>       at 
> org.apache.beam.runners.dataflow.worker.IntrinsicMapTaskExecutorFactory$1.typedApply(IntrinsicMapTaskExecutorFactory.java:183)
>        
>       at 
> org.apache.beam.runners.dataflow.worker.IntrinsicMapTaskExecutorFactory$1.typedApply(IntrinsicMapTaskExecutorFactory.java:165)
>        
>       at 
> org.apache.beam.runners.dataflow.worker.graph.Networks$TypeSafeNodeFunction.apply(Networks.java:63)
>   
>       at 
> org.apache.beam.runners.dataflow.worker.graph.Networks$TypeSafeNodeFunction.apply(Networks.java:50)
>   
>       at 
> org.apache.beam.runners.dataflow.worker.graph.Networks.replaceDirectedNetworkNodes(Networks.java:87)
>  
>       at 
> org.apache.beam.runners.dataflow.worker.IntrinsicMapTaskExecutorFactory.create(IntrinsicMapTaskExecutorFactory.java:125)
>      
>       at 
> org.apache.beam.runners.dataflow.worker.BatchDataflowWorker.doWork(BatchDataflowWorker.java:353)
>      
>       at 
> org.apache.beam.runners.dataflow.worker.BatchDataflowWorker.getAndPerformWork(BatchDataflowWorker.java:306)
>   
>       at 
> org.apache.beam.runners.dataflow.worker.DataflowBatchWorkerHarness$WorkerThread.doWork(DataflowBatchWorkerHarness.java:140)
>   
>       at 
> org.apache.beam.runners.dataflow.worker.DataflowBatchWorkerHarness$WorkerThread.call(DataflowBatchWorkerHarness.java:120)
>     
>       at 
> org.apache.beam.runners.dataflow.worker.DataflowBatchWorkerHarness$WorkerThread.call(DataflowBatchWorkerHarness.java:107)
>     
>       at java.util.concurrent.FutureTask.run(FutureTask.java:266)     
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>       
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>       
>       at java.lang.Thread.run(Thread.java:748)        
> Caused by: java.lang.ClassNotFoundException: 
> org.apache.beam.model.pipeline.v1.StandardWindowFns$SessionsPayload$Enum 
>       at java.net.URLClassLoader.findClass(URLClassLoader.java:381)   
>       at java.lang.ClassLoader.loadClass(ClassLoader.java:424)        
>       at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)        
>       at java.lang.ClassLoader.loadClass(ClassLoader.java:357)        
>       ... 21 more
> {code}



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