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https://issues.apache.org/jira/browse/NIFI-13789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17883634#comment-17883634
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ASF subversion and git services commented on NIFI-13789:
--------------------------------------------------------
Commit dee455a80216740a535bbdc988956a6d97cd7363 in nifi's branch
refs/heads/main from Mark Payne
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=dee455a802 ]
NIFI-13789 Fixed StatelessFlowManager Process Group Tracking (#9299)
The StatelessFlowManager should register any Process Group that it creates in
its internal map in the same way that StandardFlowManager does; this ensures
that the Process Group can be retrieved by ID during flow synchronization.
Signed-off-by: David Handermann <[email protected]>
> NullPointerException when trying to start a Stateless Process Group
> -------------------------------------------------------------------
>
> Key: NIFI-13789
> URL: https://issues.apache.org/jira/browse/NIFI-13789
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Major
> Fix For: 2.0.0-M5
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> I'm encountering the following error when I try to start a stateless process
> group:
> {code:java}
> 2024-09-22 10:01:38,057 ERROR [Monitor Processor Lifecycle Thread-1]
> o.a.n.groups.StandardStatelessGroupNode
> StandardStatelessGroupNode[group=StandardProcessGroup[identifier=cbfb160c-1000-1192-710e-83dde392d8b1,name=Redpanda_Consume_Produce_Loop]]
> Failed to start
> StandardStatelessGroupNode[group=StandardProcessGroup[identifier=cbfb160c-1000-1192-710e-83dde392d8b1,name=Redpanda_Consume_Produce_Loop]];
> will try again in 10 seconds
> java.lang.NullPointerException: Cannot invoke
> "org.apache.nifi.groups.ProcessGroup.getParent()" because "topLevelGroup" is
> null
> at
> org.apache.nifi.flow.synchronization.StandardVersionedComponentSynchronizer.populatePropertiesMap(StandardVersionedComponentSynchronizer.java:1464)
> at
> org.apache.nifi.flow.synchronization.StandardVersionedComponentSynchronizer.updateControllerService(StandardVersionedComponentSynchronizer.java:1390)
> at
> org.apache.nifi.flow.synchronization.StandardVersionedComponentSynchronizer.synchronizeControllerServices(StandardVersionedComponentSynchronizer.java:596)
> at
> org.apache.nifi.flow.synchronization.StandardVersionedComponentSynchronizer.synchronize(StandardVersionedComponentSynchronizer.java:415)
> at
> org.apache.nifi.flow.synchronization.StandardVersionedComponentSynchronizer.lambda$synchronize$0(StandardVersionedComponentSynchronizer.java:251)
> at
> org.apache.nifi.controller.flow.AbstractFlowManager.withParameterContextResolution(AbstractFlowManager.java:668)
> at
> org.apache.nifi.flow.synchronization.StandardVersionedComponentSynchronizer.synchronize(StandardVersionedComponentSynchronizer.java:246)
> at
> org.apache.nifi.groups.StandardProcessGroup.synchronizeFlow(StandardProcessGroup.java:3865)
> at
> org.apache.nifi.controller.flow.StandardStatelessGroupNodeFactory.createStatelessProcessGroup(StandardStatelessGroupNodeFactory.java:297)
> at
> org.apache.nifi.controller.flow.StandardStatelessGroupNodeFactory$1.createStatelessProcessGroup(StandardStatelessGroupNodeFactory.java:154)
> at
> org.apache.nifi.groups.StandardStatelessGroupNode.createStatelessFlow(StandardStatelessGroupNode.java:345)
> at
> org.apache.nifi.groups.StandardStatelessGroupNode.initialize(StandardStatelessGroupNode.java:218)
> at
> org.apache.nifi.groups.StandardStatelessGroupNode.lambda$initialize$1(StandardStatelessGroupNode.java:246)
> at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
> at
> java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
> at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
> at
> java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
> at java.base/java.lang.Thread.run(Thread.java:1583) {code}
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