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https://issues.apache.org/jira/browse/CASSANDRA-685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12798923#action_12798923
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Jonathan Ellis commented on CASSANDRA-685:
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the first patch makes it so the target node won't OOM and will instead
backpressure the control node.
the second makes it so the control node will notice the backpressure and pass
it on (via timeoutexception) to the thrift client, rather than OOMing itself
from continuing to enqueue messages to an unresponsive target.
> add backpressure to StorageProxy
> --------------------------------
>
> Key: CASSANDRA-685
> URL: https://issues.apache.org/jira/browse/CASSANDRA-685
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Jonathan Ellis
> Priority: Minor
> Fix For: 0.9
>
> Attachments:
> 0001-impose-stage-queue-limit-of-4096-operations-which-shou.txt,
> 0002-make-TcpConnection.write-throw-WriteEnqueueException-i.txt
>
>
> Now that we have CASSANDRA-401 and CASSANDRA-488 there is one last piece: we
> need to stop the target node from pulling mutations out of MessagingService
> as fast as it can only to take up space in the mutation queue and eventually
> fill up memory.
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