[jira] [Created] (KAFKA-5969) bin/kafka-preferred-replica-election.sh gives misleading error when invalid JSON file is passed as parameter

[Jakub Scholz (JIRA)]

Jakub Scholz created KAFKA-5969:
-----------------------------------

             Summary: bin/kafka-preferred-replica-election.sh gives misleading 
error when invalid JSON file is passed as parameter
                 Key: KAFKA-5969
                 URL: https://issues.apache.org/jira/browse/KAFKA-5969
             Project: Kafka
          Issue Type: Bug
          Components: tools
            Reporter: Jakub Scholz


When invalid JSON file is passed to the bin/kafka-preferred-replica-election.sh 
/ PreferredReplicaLeaderElectionCommand tool it gives a misleading error:
{code}
kafka.admin.AdminOperationException: Preferred replica election data is empty
        at 
kafka.admin.PreferredReplicaLeaderElectionCommand$.parsePreferredReplicaElectionData(PreferredReplicaLeaderElectionCommand.scala:97)
        at 
kafka.admin.PreferredReplicaLeaderElectionCommand$.main(PreferredReplicaLeaderElectionCommand.scala:66)
        at 
kafka.admin.PreferredReplicaLeaderElectionCommand.main(PreferredReplicaLeaderElectionCommand.scala)
{code}

It suggests that the data is empty instead of invalid. This can confuse people. 
The exception text should be fixed.



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