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https://issues.apache.org/jira/browse/CASSANDRA-13562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16074128#comment-16074128
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ZhaoYang commented on CASSANDRA-13562:
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you may consider checking `phi_convict_threshold` in cassandra.yaml and turning
the logging for phi value in gossip. then you will get a better idea why c*
node thinks another as down node.
> nodes in cluster gets into split-brain mode
> -------------------------------------------
>
> Key: CASSANDRA-13562
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13562
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Jaydeepkumar Chovatia
> Fix For: 3.0.x
>
>
> We have seen nodes in Cassandra (3.0.11) ring gets into split-brain somehow.
> We don't know exact reproducible steps but here is our observation:
> Let's assume we have 5 node cluster n1,n2,n3,n4,n5. In this bug when do
> nodetool status on each node then each one has different view of DN node
> e.g.
> n1 sees n3 as DN and other nodes are UN
> n3 sees n4 as DN and other nodes are UN
> n4 sees n5 as DN and other nodes are UN and so on...
> One thing we have observed is once n/w link is broken and restored then
> sometimes nodes go into this split-brain mode but we still don't have exact
> reproducible steps.
> Please let us know if I am missing anything specific here.
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