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https://issues.apache.org/jira/browse/NIFI-8771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17377595#comment-17377595
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ASF subversion and git services commented on NIFI-8771:
-------------------------------------------------------
Commit 202599931076e11acc2569ccec93db3845a30dae in nifi's branch
refs/heads/main from Mark Payne
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=2025999 ]
NIFI-8771: This closes #5205. Ensure that we consider root process group level
Controller Services when determining whether or not the dataflow is empty
Signed-off-by: Joe Witt <[email protected]>
> NiFI fails to start if clustered and flow consists only of 1+ Controller
> Services
> ---------------------------------------------------------------------------------
>
> Key: NIFI-8771
> URL: https://issues.apache.org/jira/browse/NIFI-8771
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Critical
> Fix For: 1.14.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Kind of a corner case, but if you try to start up a NiFi cluster and the
> dataflow consists of only 1 or more controller services in the root process
> group and no other components, NiFi will fail to start.
> This can fail in two possible ways:
> * If the flow was saved using the same version of NiFi as is being started,
> we will see the following error:
> {code}
> 2021-07-08 16:09:27,065 ERROR [main] o.a.nifi.controller.StandardFlowService
> Failed to load flow from cluster due to:
> org.apache.nifi.controller.serialization.FlowSynchronizationException: Failed
> to connect node to cluster because local flow controller partially updated.
> Administrator should disconnect node and review flow for corruption.
> org.apache.nifi.controller.serialization.FlowSynchronizationException: Failed
> to connect node to cluster because local flow controller partially updated.
> Administrator should disconnect node and review flow for corruption.
> at
> org.apache.nifi.controller.StandardFlowService.loadFromConnectionResponse(StandardFlowService.java:1052)
> at
> org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:521)
> at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:1206)
> at org.apache.nifi.NiFi.<init>(NiFi.java:159)
> at org.apache.nifi.NiFi.<init>(NiFi.java:71)
> at org.apache.nifi.NiFi.main(NiFi.java:303)
> Caused by:
> org.apache.nifi.controller.serialization.FlowSynchronizationException:
> java.lang.IllegalStateException: The specified observer identifier
> (bulletin-observer) already exists.
> at
> org.apache.nifi.controller.StandardFlowSynchronizer.sync(StandardFlowSynchronizer.java:306)
> at
> org.apache.nifi.controller.FlowController.synchronize(FlowController.java:1468)
> at
> org.apache.nifi.persistence.StandardXMLFlowConfigurationDAO.load(StandardXMLFlowConfigurationDAO.java:89)
> at
> org.apache.nifi.controller.StandardFlowService.loadFromBytes(StandardFlowService.java:810)
> at
> org.apache.nifi.controller.StandardFlowService.loadFromConnectionResponse(StandardFlowService.java:1021)
> ... 5 common frames omitted
> Caused by: java.lang.IllegalStateException: The specified observer identifier
> (bulletin-observer) already exists.
> at
> org.apache.nifi.logging.repository.StandardLogRepository.addObserver(StandardLogRepository.java:135)
> at
> org.apache.nifi.controller.flow.StandardFlowManager.createControllerService(StandardFlowManager.java:494)
> at
> org.apache.nifi.controller.service.ControllerServiceLoader.createControllerService(ControllerServiceLoader.java:206)
> at
> org.apache.nifi.controller.service.ControllerServiceLoader.loadControllerServices(ControllerServiceLoader.java:111)
> at
> org.apache.nifi.controller.StandardFlowSynchronizer.addControllerServices(StandardFlowSynchronizer.java:1374)
> at
> org.apache.nifi.controller.StandardFlowSynchronizer.addProcessGroup(StandardFlowSynchronizer.java:1317)
> at
> org.apache.nifi.controller.StandardFlowSynchronizer.updateFlow(StandardFlowSynchronizer.java:432)
> at
> org.apache.nifi.controller.StandardFlowSynchronizer.sync(StandardFlowSynchronizer.java:283)
> ... 9 common frames omitted
> {code}
> * If the version is different, we will see this error:
> {code}
> 2021-07-08 15:49:52,994 ERROR [main] org.apache.nifi.web.server.JettyServer
> Unable to load flow due to:
> org.apache.nifi.controller.UninheritableFlowException: Proposed flow could
> not be inherited because it references one or more Bundles that are not
> available in this NiFi instance: Could not find Bundle
> org.apache.nifi:nifi-ssl-context-service-nar:1.11.4.2.0.4.0-80:
> org.apache.nifi.ssl.StandardRestrictedSSLContextService from
> org.apache.nifi:nifi-ssl-context-service-nar:1.11.4.2.0.4.0-80 is not known
> to this NiFi instance.
> org.apache.nifi.controller.UninheritableFlowException: Proposed flow could
> not be inherited because it references one or more Bundles that are not
> available in this NiFi instance: Could not find Bundle
> org.apache.nifi:nifi-ssl-context-service-nar:1.11.4.2.0.4.0-80:
> org.apache.nifi.ssl.StandardRestrictedSSLContextService from
> org.apache.nifi:nifi-ssl-context-service-nar:1.11.4.2.0.4.0-80 is not known
> to this NiFi instance.
> at
> org.apache.nifi.controller.StandardFlowSynchronizer.sync(StandardFlowSynchronizer.java:199)
> at
> org.apache.nifi.controller.FlowController.synchronize(FlowController.java:1457)
> at
> org.apache.nifi.persistence.StandardXMLFlowConfigurationDAO.load(StandardXMLFlowConfigurationDAO.java:89)
> at
> org.apache.nifi.controller.StandardFlowService.loadFromBytes(StandardFlowService.java:810)
> at
> org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:458)
> at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:1155)
> at org.apache.nifi.NiFi.<init>(NiFi.java:159)
> at org.apache.nifi.NiFi.<init>(NiFi.java:71)
> at org.apache.nifi.NiFi.main(NiFi.java:303)
> {code}
>
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