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https://issues.apache.org/jira/browse/CASSANDRA-1894?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis resolved CASSANDRA-1894.
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Resolution: Not A Problem
Requests don't back up in ConsistencyChecker the way they do in mutation or
read stages: it's already bounded to exactly RPC_TIMEOUT's worth of activity.
> Consistency manager is unbounded
> --------------------------------
>
> Key: CASSANDRA-1894
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1894
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.6.8
> Reporter: Brandon Williams
> Priority: Minor
> Fix For: 0.6.9
>
>
> If a lot of reads are being performed at CL.ONE, and a replica node is 'sick'
> (that is, dying or going down, but the FD has not marked it down yet) then an
> unbounded amount of RR requests can back up in the consistency manager. It
> is probably better to cap this queue, and drop further RR requests, rather
> than allow it to exert GC pressure.
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