Andy LoPresto created NIFI-4556:
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Summary: Improve error messaging when ZooKeeper port conflicts
block startup
Key: NIFI-4556
URL: https://issues.apache.org/jira/browse/NIFI-4556
Project: Apache NiFi
Issue Type: Improvement
Components: Core Framework
Affects Versions: 1.4.0
Reporter: Andy LoPresto
When starting a cluster, if the ZooKeeper ports conflict (i.e. multiple ZK
nodes running on the same physical hardware and attempting to use the same
ports), the cluster will not start and the log will be flooded with error
messages, making diagnosis difficult.
The initial error message should indicate that the ZK ports are identical and
this may be the cause of the issue (NiFi doesn't know if the ZK hosts are on
the same machine, but identical port numbers is suspicious), and the repeated
log message should be vastly reduced in output rate.
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