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https://issues.apache.org/jira/browse/CASSANDRA-17908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17607363#comment-17607363
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David Capwell commented on CASSANDRA-17908:
-------------------------------------------
does not apply to 4.1 just trunk, but its a critical bug for trunk
> IllegalArgumentException in Gossiper#order due to concurrent mutations to
> elements being applied
> ------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-17908
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17908
> Project: Cassandra
> Issue Type: Bug
> Components: Cluster/Gossip
> Reporter: David Capwell
> Assignee: David Capwell
> Priority: Normal
> Fix For: 4.1.x
>
>
> org.apache.cassandra.gms.Gossiper#order was added due to sub-systems
> depending on a happens-before relationship of events even though Gossip does
> not provide such ordering… to help out we “order” the events discovered by
> gossip so we apply them in a predictable order… This has been found to have
> issues where we add the elements into the global state and under some
> conditions they get mutated causing ordering to fail
> {code}
> ERROR 2022-09-01T19:04:24,789 [GossipStage:1]
> org.apache.cassandra.service.CassandraDaemon:234 - Exception in thread
> Thread[GossipStage:1,5,main]
> java.lang.IllegalArgumentException: Comparison method violates its general
> contract!
> at java.util.TimSort.mergeLo(TimSort.java:777) ~[?:1.8.0_345]
> at java.util.TimSort.mergeAt(TimSort.java:514) ~[?:1.8.0_345]
> at java.util.TimSort.mergeForceCollapse(TimSort.java:457) ~[?:1.8.0_345]
> at java.util.TimSort.sort(TimSort.java:254) ~[?:1.8.0_345]
> at java.util.Arrays.sort(Arrays.java:1512) ~[?:1.8.0_345]
> at java.util.ArrayList.sort(ArrayList.java:1464) ~[?:1.8.0_345]
> at java.util.Collections.sort(Collections.java:177) ~[?:1.8.0_345]
> at org.apache.cassandra.gms.Gossiper.order(Gossiper.java:1327)
> ~[cie-cassandra-3.0.24.41.jar:3.0.24.41]
> at org.apache.cassandra.gms.Gossiper.applyStateLocally(Gossiper.java:1334)
> ~[cie-cassandra-3.0.24.41.jar:3.0.24.41]
> at
> org.apache.cassandra.gms.GossipDigestAck2VerbHandler.doVerb(GossipDigestAck2VerbHandler.java:49)
> ~[cie-cassandra-3.0.24.41.jar:3.0.24.41]
> at
> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:70)
> ~[cie-cassandra-3.0.24.41.jar:3.0.24.41]
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> ~[?:1.8.0_345]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_345]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> ~[?:1.8.0_345]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> ~[?:1.8.0_345]
> at
> org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:116)
> ~[cie-cassandra-3.0.24.41.jar:3.0.24.41]
> at java.lang.Thread.run(Thread.java:750) [?:1.8.0_345]
> {code}
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