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From "Michael McCandless (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3090) DWFlushControl does not take active DWPT out of the loop on fullFlush
Date Mon, 16 May 2011 16:50:47 GMT


Michael McCandless commented on LUCENE-3090:

Patch looks good but hairy Simon!

I ran 144 iters of all (Solr+lucene+lucene-contrib) tests.  I hit three fails (one in Solr's
TestJoin.testRandomJoin, and two in Solr's HighlighterTest) but I don't think these are related
to this patch.

> DWFlushControl does not take active DWPT out of the loop on fullFlush
> ---------------------------------------------------------------------
>                 Key: LUCENE-3090
>                 URL:
>             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, 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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