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https://issues.apache.org/jira/browse/CASSANDRA-8498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15304265#comment-15304265
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Joshua McKenzie commented on CASSANDRA-8498:
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bq. We advise operators not to do this (in order to avoid zombie data), but
there are cases where it makes sense
If the assumed majority case is "don't do this unless you really know what
you're doing", I think we should reflect that in our operations. I'm +1 on
failing to start w/out a specific flag that you know what you're doing, and
having a relatively verbose log message on failed startup w/out that flag.
> Replaying commit log records that are older than gc_grace is dangerous
> ----------------------------------------------------------------------
>
> Key: CASSANDRA-8498
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8498
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Benedict
>
> If we replay commit log records that are older than gc_grace we could
> introduce data corruption to the cluster. We should either (1) fail and
> suggest a repair, or (2) log an exception. I prefer (1).
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