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https://issues.apache.org/jira/browse/LUCENE-4245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420644#comment-13420644
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Uwe Schindler commented on LUCENE-4245:
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bq. If that means waiting for all merge threads to finish even though you have
been interrupted - that is fine. It's up to the app how to respond to an
interrupt. I'd prefer merges where aborted - usually if you are going to listen
to an interrupt at all, you try to do it in a timely manner.
That's what the patch is doing. If you interrupt close(), it will recover the
wait() and try a second time on the mergeScheduler with longer wait for merges
to finish. That's all it does. But as waiting in the mergeScheduler.close()
call contains Thread.join() [for CMS] its also interruptible, so this call must
be repeated until no exceptions occur anymore. It is the same like closeSafely,
it also tries to close everything ignoring Exceptions.
> IndexWriter#close(true) should either not be interruptible or should abort
> background merge threads before returning
> --------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-4245
> URL: https://issues.apache.org/jira/browse/LUCENE-4245
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Reporter: Mark Miller
> Assignee: Uwe Schindler
> Priority: Minor
> Attachments: LUCENE-4245.patch, LUCENE-4245.patch
>
>
> Currently, there is no safe way to close a directory after closing the writer
> without causing an exception in a merge thread if the #close call is
> interrupted.
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