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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