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https://issues.apache.org/jira/browse/CASSANDRA-16156?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Marcus Eriksson updated CASSANDRA-16156:
----------------------------------------
    Reviewers: Marcus Eriksson, Marcus Eriksson  (was: Marcus Eriksson)
               Marcus Eriksson, Marcus Eriksson  (was: Marcus Eriksson)
       Status: Review In Progress  (was: Patch Available)

> Decomissioned nodes are picked for gossip when unreachable nodes are 
> considered for gossiping 
> ----------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-16156
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16156
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Cluster/Gossip
>            Reporter: Alex Petrov
>            Assignee: Alex Petrov
>            Priority: Normal
>
> After node is decommissioned, it is still considered for gossip via 
> “unreachable” nodes, which results into following exceptions:
>  
> {code}
> INFO  [node4_Messaging-EventLoop-3-3] node4 2020-09-29 16:37:37,527 
> NoSpamLogger.java:91 - 
> /127.0.0.4:7012->/127.0.0.1:7012-URGENT_MESSAGES-[no-channel] failed to 
> connect
> io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection 
> refused: /127.0.0.1:7012
> Caused by: java.net.ConnectException: Connection refused
>       at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>       at 
> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
>       at 
> io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:330)
>       at 
> io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334)
>       at 
> io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:702)
>       at 
> io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
>       at 
> io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
>       at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
>       at 
> io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
>       at 
> io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
>       at 
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
>       at java.lang.Thread.run(Thread.java:748)
>  {code}
> Trace of the method that attempts to establish connection:
> {code} 
> org.apache.cassandra.net.MessagingService.getOutbound(MessagingService.java:492)
>       at 
> org.apache.cassandra.net.MessagingService.doSend(MessagingService.java:335)
>       at 
> org.apache.cassandra.net.OutboundSink$Filtered.accept(OutboundSink.java:55)
>       at org.apache.cassandra.net.OutboundSink.accept(OutboundSink.java:70)
>       at 
> org.apache.cassandra.net.MessagingService.send(MessagingService.java:327)
>       at 
> org.apache.cassandra.net.MessagingService.send(MessagingService.java:314)
>       at org.apache.cassandra.gms.Gossiper.sendGossip(Gossiper.java:813)
>       at 
> org.apache.cassandra.gms.Gossiper.maybeGossipToUnreachableMember(Gossiper.java:840)
>       at org.apache.cassandra.gms.Gossiper.access$400(Gossiper.java:86)
>  {code}
> LEFT and other nodes that are considered dead should not be picked for gossip 
> with unreachable nodes.



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