Github user JPercivall commented on the issue:
https://github.com/apache/nifi/pull/1223
Hey @markap14, I just tested it and I'm seeing a slightly different error
(stacktrace below). It came about by following the same steps (generateFF ->
replay event(s) -> let it sit a bit -> attempt to start generateFF). This time
though it spews the error only a few times (3) and then properly creates
FlowFiles. Let me know if there is any other information you need.
2016-11-15 10:16:50,533 WARN [Timer-Driven Process Thread-3]
o.a.n.p.standard.GenerateFlowFile
GenerateFlowFile[id=63c8709d-0158-1000-0fce-cb9fc498694f] Processor
Administratively Yielded for 1 sec due to processing failure
2016-11-15 10:16:50,533 WARN [Timer-Driven Process Thread-3]
o.a.n.c.t.ContinuallyRunProcessorTask Administratively Yielding
GenerateFlowFile[id=63c8709d-0158-1000-0fce-cb9fc498694f] due to uncaught
Exception: java.lang.NullPointerException
2016-11-15 10:16:50,534 WARN [Timer-Driven Process Thread-3]
o.a.n.c.t.ContinuallyRunProcessorTask
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)
~[na:na]
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)
~[na:na]
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
Suppressed: java.lang.NullPointerException: null
at
org.apache.nifi.controller.repository.FileSystemRepository$2.close(FileSystemRepository.java:962)
~[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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