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https://issues.apache.org/jira/browse/CASSANDRA-16313?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paulo Motta updated CASSANDRA-16313:
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Bug Category: Parent values: Degradation(12984)Level 1 values: Other
Exception(12998)
Complexity: Low Hanging Fruit
Discovered By: User Report
Fix Version/s: 3.11.x
3.0.x
Severity: Low
Status: Open (was: Triage Needed)
This does not affect 4.x.
> Connection failure to down node spams debug.log
> -----------------------------------------------
>
> Key: CASSANDRA-16313
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16313
> Project: Cassandra
> Issue Type: Bug
> Components: Cluster/Gossip
> Reporter: Paulo Motta
> Priority: Normal
> Fix For: 3.0.x, 3.11.x
>
>
> When a node becomes down a periodic attempt is made to try to reconnect to
> the node. However, the connection error
> [spams|https://github.com/apache/cassandra/blob/cassandra-3.11/src/java/org/apache/cassandra/net/OutboundTcpConnection.java#L546]
> the debug.log of all nodes in the cluster with the following message:
> {noformat}
> DEBUG [MessagingService-Outgoing-/XX.YY.ZZ.WW-Gossip] 2020-12-04 09:13:58,999
> OutboundTcpConnection.java:546 - Unable to connect to /XX.YY.ZZ.WW
> java.net.ConnectException: Connection refused
> at sun.nio.ch.Net.connect0(Native Method) ~[na:1.8.0_172]
> at sun.nio.ch.Net.connect(Net.java:454) ~[na:1.8.0_172]
> at sun.nio.ch.Net.connect(Net.java:446) ~[na:1.8.0_172]
> at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
> ~[na:1.8.0_172]
> at
> org.apache.cassandra.net.OutboundTcpConnectionPool.newSocket(OutboundTcpConnectionPool.java:146)
> ~[apache-cassandra-3.11.3.jar:3.11.3]
> at
> org.apache.cassandra.net.OutboundTcpConnectionPool.newSocket(OutboundTcpConnectionPool.java:132)
> ~[apache-cassandra-3.11.3.jar:3.11.3]
> at
> org.apache.cassandra.net.OutboundTcpConnection.connect(OutboundTcpConnection.java:434)
> [apache-cassandra-3.11.3.jar:3.11.3]
> at
> org.apache.cassandra.net.OutboundTcpConnection.run(OutboundTcpConnection.java:262)
> [apache-cassandra-3.11.3.jar:3.11.3]
> {noformat}
> I've seen cases where this rolled back the entire debug.log which can
> difficult troubleshooting.
> We should probably guard this in a NoSpamLogger.
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