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https://issues.apache.org/jira/browse/NIFI-1734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David A. Wynne updated NIFI-1734:
---------------------------------
Description:
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:
was:
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: 81556e02.dev.aws.lifelock.ad
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:
> 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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