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https://issues.apache.org/jira/browse/NIFI-4610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16442682#comment-16442682
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Matt Burgess commented on NIFI-4610:
------------------------------------
>From the code it looks like this can happen if one of the segments has no name
>(and thus has a null in its array when getNames() is called)
> Hanging Processor: ExtractHL7Attributes
> ---------------------------------------
>
> Key: NIFI-4610
> URL: https://issues.apache.org/jira/browse/NIFI-4610
> Project: Apache NiFi
> Issue Type: Bug
> Components: Tools and Build
> Affects Versions: 1.4.0
> Environment: Hanging Processor: ExtractHL7Attributes
> NiFi Version 1.4.0
> Tag nifi-1.4.0-RC2
> Build Date/Time 09/28/2017 14:58:26 CDT
> Name Windows Server 2012 R2
> Version 6.3
> Architecture x86
> Reporter: Eric Thompson
> Priority: Blocker
> Attachments: Display.png
>
>
> I am getting an error of 'Administratively Yielded for 1 sec due to
> processing failure' and the files that are triggering the error in the
> processor are not getting routed to the failure processor but seem to loop
> and stop up the first processor. Any ideas on how to resolve?
>
> I would expect the files that are loaded that cause the error would get
> routed, but instead it appears as though it eventually just stops accepting
> new files all together since the queue
> Sample Error in nifi-app.log:
> 2017-11-09 06:03:38,835 ERROR [Timer-Driven Process Thread-7]
> o.a.n.p.hl7.ExtractHL7Attributes
> ExtractHL7Attributes[id=015f105a-8bc0-1e9a-d683-34dd30c9d744]
> ExtractHL7Attributes[id=015f105a-8bc0-1e9a-d683-34dd30c9d744] failed to
> process session due to java.lang.NullPointerException: {}
> java.lang.NullPointerException: null
> at
> org.apache.nifi.processors.hl7.ExtractHL7Attributes.getAllFields(ExtractHL7Attributes.java:287)
> at
> org.apache.nifi.processors.hl7.ExtractHL7Attributes.getAttributes(ExtractHL7Attributes.java:217)
> at
> org.apache.nifi.processors.hl7.ExtractHL7Attributes.onTrigger(ExtractHL7Attributes.java:199)
> at
> org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
> at
> org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1119)
> at
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:147)
> at
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
> at
> org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:128)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
> at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown
> Source)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
> Source)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown
> Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown
> Source)
> at java.lang.Thread.run(Unknown Source)
> 2017-11-09 06:03:38,835 WARN [Timer-Driven Process Thread-7]
> o.a.n.p.hl7.ExtractHL7Attributes
> ExtractHL7Attributes[id=015f105a-8bc0-1e9a-d683-34dd30c9d744] Processor
> Administratively Yielded for 1 sec due to processing failure
> 2017-11-09 06:03:38,835 WARN [Timer-Driven Process Thread-7]
> o.a.n.c.t.ContinuallyRunProcessorTask Administratively Yielding
> ExtractHL7Attributes[id=015f105a-8bc0-1e9a-d683-34dd30c9d744] due to uncaught
> Exception: java.lang.NullPointerException
> 2017-11-09 06:03:38,835 WARN [Timer-Driven Process Thread-7]
> o.a.n.c.t.ContinuallyRunProcessorTask
> java.lang.NullPointerException: null
> at
> org.apache.nifi.processors.hl7.ExtractHL7Attributes.getAllFields(ExtractHL7Attributes.java:287)
> at
> org.apache.nifi.processors.hl7.ExtractHL7Attributes.getAttributes(ExtractHL7Attributes.java:217)
> at
> org.apache.nifi.processors.hl7.ExtractHL7Attributes.onTrigger(ExtractHL7Attributes.java:199)
> at
> org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
> at
> org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1119)
> at
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:147)
> at
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
> at
> org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:128)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
> at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown
> Source)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
> Source)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown
> Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown
> Source)
> at java.lang.Thread.run(Unknown Source)
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