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https://issues.apache.org/jira/browse/NIFI-10132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17555769#comment-17555769
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Greg Biddy commented on NIFI-10132:
-----------------------------------
[~exceptionfactory] I believe our issue may be related to differences in
configuration files between 1.16.3 and 1.15.3 that our automated deployment
process is not accounting for. Thanks for all the help on this.
> New NiFi Installation Fails to Start
> ------------------------------------
>
> Key: NIFI-10132
> URL: https://issues.apache.org/jira/browse/NIFI-10132
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.16.2, 1.16.3
> Environment: RHEL OS
> Reporter: Greg Biddy
> Priority: Blocker
> Attachments: test_template_1.15.3.xml
>
>
> I am attempting to deploy a NiFi cluster running NiFi 1.16.3. In all cases,
> the application fails to start. I have observed two errors in the nifi
> application log during the start-up process.
> One occurs if no flow.xml.gz is present in the conf directory when the nifi
> service is started:
> {code:java}
> 2022-06-16 20:30:51,774 INFO [main] org.apache.nifi.io.socket.SocketListener
> Now listening for connections from nodes on port 11443
> 2022-06-16 20:30:51,820 INFO [main] o.a.n.c.s.VersionedFlowSynchronizer
> Synchronizing FlowController with proposed flow: Controller Already
> Synchronized = false
> 2022-06-16 20:30:51,906 WARN [main] org.apache.nifi.web.server.JettyServer
> Failed to start web server... shutting down.
> java.lang.NullPointerException: null
> at
> org.apache.nifi.registry.flow.diff.StandardFlowDifference.hashCode(StandardFlowDifference.java:92)
> at java.util.HashMap.hash(HashMap.java:339)
> at java.util.HashMap.put(HashMap.java:612)
> at java.util.HashSet.add(HashSet.java:220)
> at
> org.apache.nifi.registry.flow.diff.StandardFlowComparator.addIfDifferent(StandardFlowComparator.java:567)
> at
> org.apache.nifi.registry.flow.diff.StandardFlowComparator.compare(StandardFlowComparator.java:456)
> at
> org.apache.nifi.registry.flow.diff.StandardFlowComparator.compare(StandardFlowComparator.java:94)
> at
> org.apache.nifi.registry.flow.diff.StandardFlowComparator.compare(StandardFlowComparator.java:79)
> at
> org.apache.nifi.controller.serialization.VersionedFlowSynchronizer.compareFlows(VersionedFlowSynchronizer.java:387)
> at
> org.apache.nifi.controller.serialization.VersionedFlowSynchronizer.sync(VersionedFlowSynchronizer.java:167)
> at
> org.apache.nifi.controller.serialization.StandardFlowSynchronizer.sync(StandardFlowSynchronizer.java:43)
> at
> org.apache.nifi.controller.FlowController.synchronize(FlowController.java:1524)
> at
> org.apache.nifi.persistence.StandardFlowConfigurationDAO.load(StandardFlowConfigurationDAO.java:107)
> at
> org.apache.nifi.controller.StandardFlowService.loadFromBytes(StandardFlowService.java:819)
> at
> org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:461)
> at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:1086)
> at org.apache.nifi.NiFi.<init>(NiFi.java:170)
> at org.apache.nifi.NiFi.<init>(NiFi.java:82)
> at org.apache.nifi.NiFi.main(NiFi.java:330) {code}
>
> The second error occurs if there is a flow.xml.gz present when the nifi
> service is started, where the flow is copied over from a cluster running
> 1.15.3:
> {code:java}
> 2022-06-16 20:29:31,101 INFO [main] org.apache.nifi.web.server.JettyServer
> Loading Flow...
> 2022-06-16 20:29:31,106 INFO [main] org.apache.nifi.io.socket.SocketListener
> Now listening for connections from nodes on port 11443
> 2022-06-16 20:29:31,130 WARN [main] org.apache.nifi.web.server.JettyServer
> Failed to start web server... shutting down.
> java.lang.NullPointerException: null
> at
> org.apache.nifi.util.DomUtils.getChildElementsByTagName(DomUtils.java:53)
> at
> org.apache.nifi.controller.serialization.FlowFromDOMFactory.getChildrenByTagName(FlowFromDOMFactory.java:635)
> at
> org.apache.nifi.controller.serialization.FlowFromDOMFactory.getString(FlowFromDOMFactory.java:582)
> at
> org.apache.nifi.controller.serialization.FlowFromDOMFactory.getProcessGroup(FlowFromDOMFactory.java:187)
> at
> org.apache.nifi.controller.XmlFlowSynchronizer.isFlowEmpty(XmlFlowSynchronizer.java:660)
> at
> org.apache.nifi.controller.XmlFlowSynchronizer.sync(XmlFlowSynchronizer.java:179)
> at
> org.apache.nifi.controller.serialization.StandardFlowSynchronizer.sync(StandardFlowSynchronizer.java:43)
> at
> org.apache.nifi.controller.FlowController.synchronize(FlowController.java:1524)
> at
> org.apache.nifi.persistence.StandardFlowConfigurationDAO.load(StandardFlowConfigurationDAO.java:107)
> at
> org.apache.nifi.controller.StandardFlowService.loadFromBytes(StandardFlowService.java:819)
> at
> org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:461)
> at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:1086)
> at org.apache.nifi.NiFi.<init>(NiFi.java:170)
> at org.apache.nifi.NiFi.<init>(NiFi.java:82)
> at org.apache.nifi.NiFi.main(NiFi.java:330)
> 2022-06-16 20:29:31,131 INFO [Thread-1] org.apache.nifi.NiFi Application
> Server shutdown started {code}
> Any guidance would be much appreciated.
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