[jira] [Deleted] (NIFI-1734) Confusing warning thrown when DNS issues occur on a system with a NCM running

["Mark Payne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-1734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Payne deleted NIFI-1734:
-----------------------------


> Confusing warning thrown when DNS issues occur on a system with a NCM running
> -----------------------------------------------------------------------------
>
>                 Key: NIFI-1734
>                 URL: https://issues.apache.org/jira/browse/NIFI-1734
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: David A. Wynne
>            Priority: Minor
>
> If a system with a NiFi NCM instance running has a DNS issue, the first error message thrown is correct, but the subsequent warning message lead the user to believe it is a firewall issue, thus confusing the user and leading to an inaccurate assessment of the issue.
> First error when DNS issue occurs:
> 2016-04-05 14:07:46,488 ERROR [Process Pending Heartbeats] o.a.n.c.manager.impl.WebClusterManager Failed to process heartbeat from due to org.apache.nifi.cluster.protocol.ProtocolException: Failed to create socket due to: java.net.UnknownHostException:
> The next warning thrown:
> 2016-04-05 14:07:46,488 WARN [Heartbeat Monitor] o.a.n.c.f.i.FileBasedClusterNodeFirewall Blocking unknown host '' 
> java.net.UnknownHostException: 



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