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https://issues.apache.org/jira/browse/CASSANDRA-2428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016569#comment-13016569
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Chris Goffinet commented on CASSANDRA-2428:
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If curious why we were running join_ring = false after the node had data, it
was because we had ran out of space on a node, and many SSTables had been
created, but unable to compact. When we brought the node back online after
moving some data off, the number of SSTables being read w/ live traffic caused
us to run out of file descriptors. So we decided to run join_ring=false on
bootup, and let compaction run without taking on traffic. This worked really
well, and we wanted to finalize our cleanup process.
> Running cleanup on a node with join_ring=false removes all data
> ---------------------------------------------------------------
>
> Key: CASSANDRA-2428
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2428
> Project: Cassandra
> Issue Type: Bug
> Reporter: Chris Goffinet
> Priority: Critical
>
> If you need to bring up a node with join_ring=false for operator maintenance,
> and this node already has data, it will end up removing the data on the node.
> We noticed this when we were calling cleanup on a specific CF.
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