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https://issues.apache.org/jira/browse/LUCENE-9422?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Viral Gandhi resolved LUCENE-9422.
----------------------------------
Resolution: Invalid
I think this was happening due to our modification in
ConcurrentMergeSchedulerWrapper, I'll reopen if we can reproduce on a clean
Lucene clone.
> Detailed logging for MergePolicy$MergeException stack trace
> ------------------------------------------------------------
>
> Key: LUCENE-9422
> URL: https://issues.apache.org/jira/browse/LUCENE-9422
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Viral Gandhi
> Priority: Minor
>
>
> We hit the following exception:
> {code:java}
> Uncaught exception: org.apache.lucene.index.MergePolicy$MergeException:
> java.lang.IllegalStateException: files were not computed yet; segment=_3g5
> maxDoc=3095 in thread Thread[Lucene Merge Thread #456,5,main]
> org.apache.lucene.index.MergePolicy$MergeException:
> java.lang.IllegalStateException: files were not computed yet; segment=_3g5
> maxDoc=3095
> at
> org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:704)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:684)
> Caused by: java.lang.IllegalStateException: files were not computed yet;
> segment=_3g5 maxDoc=3095
> at org.apache.lucene.index.SegmentInfo.files(SegmentInfo.java:176)
> at
> org.apache.lucene.index.SegmentCommitInfo.files(SegmentCommitInfo.java:228)
> at org.apache.lucene.index.IndexWriter$2.mergeFinished(IndexWriter.java:3181)
> at
> org.apache.lucene.index.IndexWriter.closeMergeReaders(IndexWriter.java:4444)
> at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4744)
> at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:4170)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:625)
> at
> com.amazon.lucene.index.ConcurrentMergeSchedulerWrapper.doMerge(ConcurrentMergeSchedulerWrapper.java:64)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:662)
> {code}
>
> After a merge thread hit an exception, and in trying to throw the exception,
> Lucene called _SegmentInfo.files()_ which then threw another exception. Maybe
> this caused in losing root cause exception? Having more details regarding the
> root cause would have been helpful here.
>
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