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Posted to commits@heron.apache.org by GitBox <gi...@apache.org> on 2018/06/20 22:01:14 UTC
[GitHub] huijunw opened a new issue #2927: [dhalion] null exception for
previousCheckpoint
huijunw opened a new issue #2927: [dhalion] null exception for previousCheckpoint
URL: https://github.com/apache/incubator-heron/issues/2927
We saw the below exception in the HealthMgr log. The exception was from Dhalion library. The exception caused the HealthMgr process to quit.
```
[2018-06-20 20:44:11 +0000] [STDERR] stderr: Exception in thread "main"
[2018-06-20 20:44:11 +0000] [STDERR] stderr: java.util.concurrent.ExecutionException: java.lang.NullPointerException
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.concurrent.FutureTask.report(FutureTask.java:122)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.concurrent.FutureTask.get(FutureTask.java:192)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at org.apache.heron.healthmgr.HealthManager.main(HealthManager.java:241)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: Caused by: java.lang.NullPointerException
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.time.Instant.compareTo(Instant.java:1255)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.time.Instant.isBefore(Instant.java:1285)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at com.microsoft.dhalion.policy.PoliciesExecutor.lambda$null$0(PoliciesExecutor.java:83)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at com.microsoft.dhalion.policy.PoliciesExecutor.lambda$start$2(PoliciesExecutor.java:84)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[2018-06-20 20:44:11 +0000] [STDERR] stderr: at java.lang.Thread.run(Thread.java:748)
```
I doubt the Null was from https://github.com/Microsoft/Dhalion/blob/0.2.1/src/main/java/com/microsoft/dhalion/policy/PoliciesExecutor.java#L74?
Btw, we have several jobs and saw this issue in only one job.
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