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https://issues.apache.org/jira/browse/LUCENE-7999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16210891#comment-16210891
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Uwe Schindler commented on LUCENE-7999:
---------------------------------------
Thanks Mykhailo for reporting this! We will look into it. I think the
indexCreatedVersion must be changed accoring to the branch, we commit this to.
> Invalid segment file name
> -------------------------
>
> Key: LUCENE-7999
> URL: https://issues.apache.org/jira/browse/LUCENE-7999
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 5.x, 6.x, 7.0
> Reporter: Mykhailo Demianenko
> Priority: Minor
> Attachments: segmentName.patch
>
>
> After really long and intensive index usage its possible to overflow counter
> that used to generate new segment name that will not satisfy validation
> criteria:
> Caused by: java.lang.IllegalArgumentException: invalid codec filename
> '_-zik0zk_Lucene54_0.dvm', must match: _[a-z0-9]+(_.*)?\..*
> at
> org.apache.lucene.index.SegmentInfo.checkFileNames(SegmentInfo.java:280)
> at org.apache.lucene.index.SegmentInfo.addFiles(SegmentInfo.java:262)
> at org.apache.lucene.index.SegmentInfo.setFiles(SegmentInfo.java:256)
> at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4080)
> at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3655)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:588)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:626)
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