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https://issues.apache.org/jira/browse/CASSANDRA-1028?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stu Hood updated CASSANDRA-1028:
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Attachment: 0001-Clear-AES-before-begininning-the-next-test.patch
Since nothing we do with the TokenMetadata is multithreaded, I'm fairly certain
this is caused by background tasks left in the AES stage after tests. This
patch clears the stage during teardown. 100ish runs of the test seem to confirm
that this fixes the problem.
> NPE in AntiEntropyService.getNeighbors
> --------------------------------------
>
> Key: CASSANDRA-1028
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1028
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Stu Hood
> Fix For: 0.7
>
> Attachments: 0001-Clear-AES-before-begininning-the-next-test.patch
>
>
> Sometimes, but not always, I see this during a test run:
> [junit] Testsuite: org.apache.cassandra.service.AntiEntropyServiceTest
> [junit] Tests run: 10, Failures: 0, Errors: 0, Time elapsed: 3.189 sec
> [junit]
> [junit] ------------- Standard Error -----------------
> [junit] ERROR 10:19:09,743 Error in executor futuretask
> [junit] java.util.concurrent.ExecutionException:
> java.lang.NullPointerException
> [junit] at
> java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
> [junit] at java.util.concurrent.FutureTask.get(FutureTask.java:83)
> [junit] at
> org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor.afterExecute(DebuggableThreadPoolExecutor.java:87)
> [junit] at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:888)
> [junit] at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> [junit] at java.lang.Thread.run(Thread.java:637)
> [junit] Caused by: java.lang.NullPointerException
> [junit] at
> java.util.AbstractCollection.addAll(AbstractCollection.java:303)
> [junit] at
> org.apache.cassandra.service.AntiEntropyService.getNeighbors(AntiEntropyService.java:151)
> [junit] at
> org.apache.cassandra.service.AntiEntropyService.rendezvous(AntiEntropyService.java:176)
> [junit] at
> org.apache.cassandra.service.AntiEntropyService.access$100(AntiEntropyService.java:86)
> [junit] at
> org.apache.cassandra.service.AntiEntropyService$Validator.call(AntiEntropyService.java:487)
> [junit] at
> java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> [junit] at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> [junit] at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> [junit] ... 2 more
> [junit] ------------- ---------------- ---------------
> Ideally it would be nice if this could cause an actual test failure when it
> happens. Not sure how feasible that is.
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