[jira] [Created] (NIFI-1735) Confusing messages in app log when DNS issues occur on a system with a NCM

["David A. Wynne (JIRA)" <ji...@apache.org>]

David A. Wynne created NIFI-1735:
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             Summary: Confusing messages in app log when DNS issues occur on a system with a NCM
                 Key: NIFI-1735
                 URL: https://issues.apache.org/jira/browse/NIFI-1735
             Project: Apache NiFi
          Issue Type: Bug
            Reporter: David A. Wynne
            Priority: Minor


When a system running with a NCM instance of NiFi has DNS issues, the logging is confusing to the user and leads to believe there is a firewall issue.

INFO [Process Pending Heartbeats] o.a.n.c.manager.impl.WebClusterManager Node Event: [id=xxx, apiAddress=hostname, apiPort=port, socketAddress=hostname, socketPort=port] -- 'Firewall blocked received heartbeat. Issuing disconnection request.'

INFO [Process Pending Heartbeats] o.a.n.c.manager.impl.WebClusterManager Node Event: [id=xxx, apiAddress=hostname, apiPort=port, socketAddress=hostname, socketPort=port] -- 'Disconnection requested due to Blocked By Firewall'

ERROR [Process Pending Heartbeats] o.a.n.c.manager.impl.WebClusterManager Failed to process heartbeat from hostname:port due to org.apache.nifi.cluster.protocol.ProtocolException: Failed to create socket due to: java.net.UnknownHostException: hostname





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