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https://issues.apache.org/jira/browse/LUCENE-2618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12923989#action_12923989
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Shai Erera commented on LUCENE-2618:
------------------------------------

Does this mean I'll need to catch that exception every time I close an IW, or 
at least prepare to catch it? If so, shouldn't we document it? Is it only 
relevant to the test?

Somehow this change / fix starts to get complicated. Can IW swallow those 
exceptions internally, and relieve the application from all this? When I 
close(false), I should be prepared to hit MergeAbortedException, it's kinda 
part of the API contract. But when I close(true), why do I need to be prepared 
to handle any exception, except for real IO ones?

> Intermittent failure in 3.x's backwards TestThreadedOptimize
> ------------------------------------------------------------
>
>                 Key: LUCENE-2618
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2618
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Index
>            Reporter: Michael McCandless
>             Fix For: 3.1, 4.0
>
>         Attachments: LUCENE-2618.patch, LUCENE-2618.patch
>
>
> Failure looks like this:
> {noformat}
>     [junit] Testsuite: org.apache.lucene.index.TestThreadedOptimize
>     [junit] Testcase: 
> testThreadedOptimize(org.apache.lucene.index.TestThreadedOptimize):     FAILED
>     [junit] null
>     [junit] junit.framework.AssertionFailedError: null
>     [junit]   at 
> org.apache.lucene.index.TestThreadedOptimize.runTest(TestThreadedOptimize.java:125)
>     [junit]   at 
> org.apache.lucene.index.TestThreadedOptimize.testThreadedOptimize(TestThreadedOptimize.java:149)
>     [junit]   at 
> org.apache.lucene.util.LuceneTestCase.runBare(LuceneTestCase.java:253)
> {noformat}
> I just committed some verbosity so next time it strikes we'll have more 
> details.

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