MergeException from CMS threads should record the Directory
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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-1150.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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