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https://issues.apache.org/jira/browse/NIFI-7781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17188533#comment-17188533
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Joe Witt commented on NIFI-7781:
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I am closing this JIRA as the cause hit in this case appears to be one which
includes a sufficient explanation (you cannot have two nars with the same
coordinates). Further, nars are used even for the framework itself. Once we
have the extension registry loading nars on demand at runtime on top of a
raw/base nifi kernel then this is more reasonable. for now, the notion of us
choosing to ignore certain nars during loading from a static installation is
not something we intend to pursue.
> Nar loading should not impact the loading of NiFi overall
> ---------------------------------------------------------
>
> Key: NIFI-7781
> URL: https://issues.apache.org/jira/browse/NIFI-7781
> Project: Apache NiFi
> Issue Type: Bug
> Components: Extensions
> Affects Versions: 1.11.4
> Environment: Linux
> Reporter: Joseph Kesselman
> Priority: Major
> Labels: exception-handling
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> No matter what's broken about it, a bad nar should not be able to keep the
> rest of NiFi from running. Catch and handle this exception. And preferably
> give us more information about what the problem was than "unable to load" –
> was file not found, not a valid nar, in conflict with other classes, written
> on a Thursday...
>
> 2020-08-31 23:58:20,960 ERROR [main] -> org.apache.nifi.NiFi -> Failure to
> launch NiFi due to java.lang.IllegalStateException: Unable to load NAR with co
> java.lang.IllegalStateException: Unable to load NAR with coordinates
> com.ibm.rtwa:nifi-random-nar:1.0-SNAPSHOT and working directory
> ./work/nar/extension
> at org.apache.nifi.nar.NarClassLoaders.load(NarClassLoaders.java:181)
> at org.apache.nifi.nar.NarClassLoaders.init(NarClassLoaders.java:119)
> at org.apache.nifi.NiFi.<init>(NiFi.java:134)
> at org.apache.nifi.NiFi.<init>(NiFi.java:72)
> at org.apache.nifi.NiFi.main(NiFi.java:301)
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