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https://issues.apache.org/jira/browse/NIFI-11342?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Peter Turcsanyi resolved NIFI-11342.
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Fix Version/s: 2.0.0
1.22.0
Resolution: Fixed
> HDFS processors fail to get ClassloaderIsolationKey at startup
> --------------------------------------------------------------
>
> Key: NIFI-11342
> URL: https://issues.apache.org/jira/browse/NIFI-11342
> Project: Apache NiFi
> Issue Type: Bug
> Reporter: Mark Bathori
> Assignee: Mark Bathori
> Priority: Major
> Fix For: 2.0.0, 1.22.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> At the start of NiFi, the HDFS processors fail to get ClassloaderIsolationKey
> when only KerberosUserService is provided. The processor tries the get the
> isolation key by calling the createKerberosUser method on the service but it
> fails because at the time of method call the controller service is in
> Disabled state.
> https://github.com/apache/nifi/blob/main/nifi-nar-bundles/nifi-extension-utils/nifi-hadoop-utils/src/main/java/org/apache/nifi/processors/hadoop/AbstractHadoopProcessor.java#L224
> Error message:
> {code:java}
> Failed to determine ClassLoader Isolation Key for
> PutHDFS[id=192e8080-0187-1000-ee4f-a7100d9d7dbb]. This could result in
> unexpected behavior by this processor.:
> org.apache.nifi.controller.service.ControllerServiceDisabledException: Cannot
> invoke method public abstract org.apache.nifi.security.krb.KerberosUser
> org.apache.nifi.kerberos.KerberosUserService.createKerberosUser() on
> Controller Service with identifier 0e84e32e-0187-1000-5e37-8cd7279916f6
> because the Controller Service's State is currently DISABLED{code}
> The problem only occurs after NiFi restart. Adding a new HDFS processor to
> the canvas and setting the Kerberos UserService can properly get the
> isolation key.
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