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https://issues.apache.org/jira/browse/NIFI-10048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17558299#comment-17558299
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Hadiiiiiiiii commented on NIFI-10048:
-------------------------------------
[~moganarich] u are right, but i advice use toolkit to fix sensitive keys and
recreate flow.xml.gz
> Apache Nifi Web Server keeps failing to start
> ----------------------------------------------
>
> Key: NIFI-10048
> URL: https://issues.apache.org/jira/browse/NIFI-10048
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.16.1
> Reporter: Andreas Adamides
> Priority: Critical
>
> The following exception keeps occurring on the Apache NiFi Cluster, this is
> from the app logs:
> {code:java}
> 2022-05-24 15:13:03,669 INFO [main] o.a.n.c.s.VersionedFlowSynchronizer
> Synching FlowController with proposed flow: Controller Already Synchronized =
> false
> 2022-05-24 15:13:04,260 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:340)
> at java.util.HashMap.put(HashMap.java:613)
> at java.util.HashSet.add(HashSet.java:220)
> at
> org.apache.nifi.registry.flow.diff.StandardFlowComparator.addIfDifferent(StandardFlowComparator.java:562)
> at
> org.apache.nifi.registry.flow.diff.StandardFlowComparator.compare(StandardFlowComparator.java:447)
> at
> org.apache.nifi.registry.flow.diff.StandardFlowComparator.compare(StandardFlowComparator.java:92)
> at
> org.apache.nifi.registry.flow.diff.StandardFlowComparator.compare(StandardFlowComparator.java:77)
> at
> org.apache.nifi.controller.serialization.VersionedFlowSynchronizer.compareFlows(VersionedFlowSynchronizer.java:383)
> at
> org.apache.nifi.controller.serialization.VersionedFlowSynchronizer.sync(VersionedFlowSynchronizer.java:165)
> 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:104)
> at
> org.apache.nifi.controller.StandardFlowService.loadFromBytes(StandardFlowService.java:815)
> at
> org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:457)
> 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)
> 2022-05-24 15:13:04,261 INFO [Thread-1] org.apache.nifi.NiFi Application
> Server shutdown started{code}
> There is not a Nifi Registry in the setup, I have tried to tear everything
> down to freshly install Nifi Cluster, but it keeps failing to start. This has
> been part of a helm chart/k8 setup. This issue occurs in 2 nodes of a 3-node
> Nifi cluster. I manage to fix it when downgrading to 1 node overall, which
> does not make a lot of sense.
>
> Can anyone suggest what I am doing wrong?
>
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