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https://issues.apache.org/jira/browse/LUCENE-3090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13033043#comment-13033043
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Robert Muir commented on LUCENE-3090:
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bq. net flush pending means? we only differ between flushing ram and active ram
so flushing ram can easily get above such a limit if IO is slow...
I/O or just "O"? Should we add a ThrottledIndexInput too? :)
> DWFlushControl does not take active DWPT out of the loop on fullFlush
> ---------------------------------------------------------------------
>
> Key: LUCENE-3090
> URL: https://issues.apache.org/jira/browse/LUCENE-3090
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Assignee: Simon Willnauer
> Priority: Critical
> Fix For: 4.0
>
> Attachments: LUCENE-3090.patch, LUCENE-3090.patch
>
>
> We have seen several OOM on TestNRTThreads and all of them are caused by
> DWFlushControl missing DWPT that are set as flushPending but can't full due
> to a full flush going on. Yet that means that those DWPT are filling up in
> the background while they should actually be checked out and blocked until
> the full flush finishes. Even further we currently stall on the
> maxNumThreadStates while we should stall on the num of active thread states.
> I will attach a patch tomorrow.
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