And do I need to do any cleanup once I catch the MergeAbortedException
(such as writer commit or rollback)?
Thanks,
Vincent
v.se...@lombardodier.com
26.01.2011 15:44
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Subject
Re: gracefully interrupting an optimize
Hi Michael,
I suppose that as you suggested, if I do a close(false) during an optimize
I am supposed to expect the following exception:
java.io.IOException: background merge hit exception: _3ud72:c33936445
_3uqhr:c126349 _3uuf8:c57041 _3v27p:c78599 _3vf2s:c111005 _3vfad:c6574
_3vrcj:c130263 _3vrci:c1224 into _3vrck [optimize] [mergeDocStores]
at
org.apache.lucene.index.IndexWriter.optimize(IndexWriter.java:2859)
at
org.apache.lucene.index.IndexWriter.optimize(IndexWriter.java:2794)
at
org.apache.lucene.index.IndexWriter.optimize(IndexWriter.java:2764)
at logserver.LuceneWriter.optimize(LuceneWriter.java:91)
at logserver.SweeperMgr.optimize(SweeperMgr.java:196)
at logserver.SweeperMgr.safelyExecute(SweeperMgr.java:104)
at logserver.SweeperMgr.access$1(SweeperMgr.java:90)
at logserver.SweeperMgr$1.run(SweeperMgr.java:74)
Caused by: org.apache.lucene.index.MergePolicy$MergeAbortedException:
merge is aborted: _3ud72:c33936445 _3uqhr:c126349 _3uuf8:c57041
_3v27p:c78599 _3vf2s:c111005 _3vfad:c6574 _3vrcj:c130263 _3vrci:c1224 into
_3vrck [optimize] [mergeDocStores]
at
org.apache.lucene.index.MergePolicy$OneMerge.checkAborted(MergePolicy.java:122)
at
org.apache.lucene.index.SegmentMerger$CheckAbort.work(SegmentMerger.java:788)
at
org.apache.lucene.index.SegmentMerger.mergeTermInfos(SegmentMerger.java:650)
at
org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:586)
at
org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:154)
at
org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:5045)
at
org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:4630)
at
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:235)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:291)
right? I can interpret this as "everything is as planned".
thanks
Vincent Sevel
Michael McCandless <luc...@mikemccandless.com>
21.01.2011 15:48
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Subject
Re: gracefully interrupting an optimize
No.
If you just do IW.close() <-- no boolean specified, then that defaults
to IW.close(true) which means "wait for all BG merges to finish".
So "normally" IW.close() reserves the right to take a long time.
But IW.close(false) should finish relatively quickly...
Mike
On Fri, Jan 21, 2011 at 9:20 AM, Paul Libbrecht <p...@hoplahup.net> wrote:
> Would that happen "automagically" at finalization?
>
> paul
>
>
> Le 21 janv. 2011 à 15:13, Michael McCandless a écrit :
>
>> If you call optimize(false), that'll return immediately but run the
>> optimize "in the background" (assuming you are using the default
>> ConcurrentMergeScheduler).
>>
>> Later, when it's time to stop optimizing, call IW.close(false), which
>> will abort any running merges yet keep any merges that had finished
>> (so some work, but not necessarily all work, is lost); it should
>> return quickly.
>>
>> Mike
>>
>> On Fri, Jan 21, 2011 at 8:28 AM, <v.se...@lombardodier.com> wrote:
>>> Hi,
>>>
>>> Each night I optimize an index that contains 35 millions docs. Its
takes
>>> about 1.5 hours. For maintenance reasons, it may happen that the
machine
>>> gets rebooted. In that case, server gets a chance to gracefully
shutdown,
>>> but eventually, the reboot script will kill the processes that did not
>>> stop in time. My preference would to stop gracefully the optimize
rather
>>> than getting the process killed. Is there a way to do that?
>>>
>>> Thanks,
>>>
>>> Vincent
>>>
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