Joseph Percivall created NIFI-3036:
--------------------------------------
Summary: Resource Claim can violate its "isInUse" assumption
causing Null Pointer Exceptions
Key: NIFI-3036
URL: https://issues.apache.org/jira/browse/NIFI-3036
Project: Apache NiFi
Issue Type: Bug
Reporter: Joseph Percivall
Priority: Critical
Fix For: 1.1.0
I hit a Null Pointer Exception when testing on the lastest master. After
digging I believe the root cause to be the assumption explained here[1] being
violated.
Specifically I was replaying events on a disk that was over the threshold for
not archiving and seeing this[2] stacktrace. So the claimnant count was
increased from 0 when "isWritable" was false causing the ResourceClaim to still
be a key in the "writeableClaimStreams" map but have a value of null.
I have tested on 1.0.0 and was not able to reproduce.
[1]
https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/repository/claim/StandardResourceClaim.java#L142-L142
[2] 2016-11-14 16:00:19,783 INFO [Flow Service Tasks Thread-2]
o.a.nifi.controller.StandardFlowService Saved flow controller
org.apache.nifi.controller.FlowController@6191c12d // Another save pending =
false
2016-11-14 16:00:21,016 INFO [StandardProcessScheduler Thread-4]
o.a.n.c.s.TimerDrivenSchedulingAgent Scheduled
GenerateFlowFile[id=01581004-90ba-149c-7ccc-4fe3d2dcfe12] to run with 1 threads
2016-11-14 16:00:21,017 ERROR [Timer-Driven Process Thread-8]
o.a.n.p.standard.GenerateFlowFile
GenerateFlowFile[id=01581004-90ba-149c-7ccc-4fe3d2dcfe12]
GenerateFlowFile[id=01581004-90ba-149c-7ccc-4fe3d2dcfe12] failed to process due
to java.lang.NullPointerException; rolling back session:
java.lang.NullPointerException
2016-11-14 16:00:21,018 ERROR [Timer-Driven Process Thread-8]
o.a.n.p.standard.GenerateFlowFile
java.lang.NullPointerException: null
at
org.apache.nifi.controller.repository.FileSystemRepository$2.write(FileSystemRepository.java:907)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.io.DisableOnCloseOutputStream.write(DisableOnCloseOutputStream.java:49)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.io.ByteCountingOutputStream.write(ByteCountingOutputStream.java:46)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.io.ByteCountingOutputStream.write(ByteCountingOutputStream.java:41)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.io.FlowFileAccessOutputStream.write(FlowFileAccessOutputStream.java:78)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.processors.standard.GenerateFlowFile$1.process(GenerateFlowFile.java:192)
~[nifi-standard-processors-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.StandardProcessSession.write(StandardProcessSession.java:2321)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.processors.standard.GenerateFlowFile.onTrigger(GenerateFlowFile.java:189)
~[nifi-standard-processors-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
~[nifi-api-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1089)
[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:136)
[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:132)
[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[na:1.8.0_74]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
[na:1.8.0_74]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
[na:1.8.0_74]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
[na:1.8.0_74]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[na:1.8.0_74]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[na:1.8.0_74]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_74]
Suppressed: java.lang.NullPointerException: null
at
org.apache.nifi.controller.repository.FileSystemRepository$2.flush(FileSystemRepository.java:923)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.io.DisableOnCloseOutputStream.close(DisableOnCloseOutputStream.java:68)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.io.ByteCountingOutputStream.close(ByteCountingOutputStream.java:61)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.StandardProcessSession.write(StandardProcessSession.java:2322)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
... 13 common frames omitted
Suppressed: java.lang.NullPointerException: null
at
org.apache.nifi.controller.repository.FileSystemRepository$2.flush(FileSystemRepository.java:923)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.io.DisableOnCloseOutputStream.close(DisableOnCloseOutputStream.java:68)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
at
org.apache.nifi.controller.repository.StandardProcessSession.write(StandardProcessSession.java:2322)
~[nifi-framework-core-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
... 13 common frames omitted
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