Mark Bathori created NIFI-11342:
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Summary: 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
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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