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https://issues.apache.org/jira/browse/LUCENE-1160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless resolved LUCENE-1160.
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Resolution: Fixed
> MergeException from CMS threads should record the Directory
> -----------------------------------------------------------
>
> Key: LUCENE-1160
> URL: https://issues.apache.org/jira/browse/LUCENE-1160
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 2.3
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 2.4
>
> Attachments: LUCENE-1160.patch
>
>
> When you hit an unhandled exception in ConcurrentMergeScheduler, it
> throws a MergePolicy.MergeException, but there's no easy way to figure
> out which index caused this (if you have more than one).
> I plan to add the Directory to the MergeException. I also made a few
> other small changes to ConcurrentMergeScheduler:
> * Added handleMergeException method, which is called on exception,
> so that you can subclass ConcurrentMergeScheduler to do something
> when an exception occurs.
> * Added getMergeThread() method so you can override how the threads
> are created (eg, if you want to make them in a different thread
> group, use a pool, change priorities, etc.).
> * Added doMerge(...) to actually do this merge, so you can do
> something before starting and after finishing a merge.
> * Changed private -> protected on a few attrs
> I plan to commit in a day or two.
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