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https://issues.apache.org/jira/browse/LUCENE-5377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13878604#comment-13878604
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Shai Erera commented on LUCENE-5377:
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Isn't it then a problem of anyone that will try to addIndexes a pre-4.6 index
to a 4.6+?
I looked at TestBackCompat.addOldIndexes - it doesn't do anything with the
added index to verify it's OK. I added
{{DirectoryReader.open(targetDir).close();}} to the test after {{w.close()}},
so at least we verify the index can be opened, but the test doesn't fail, not
sure why. The newest "oldNames" is 4.2 - shouldn't a 4.5 have been created when
we released 4.6, since we changed the index format? But then a 4.0/4.2 index
should equally fail to be added to a 4.6, right? So maybe this doesn't explain
the failure to reproduce this error...
> Lucene 4.6 cause mixed version segments info file(.si) wrong
> ------------------------------------------------------------
>
> Key: LUCENE-5377
> URL: https://issues.apache.org/jira/browse/LUCENE-5377
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index, modules/facet
> Affects Versions: 4.6
> Environment: windows/linux
> Reporter: Littlestar
> Attachments: TestCore_45.java, TestCore_46.java
>
>
> my old facet index create by Lucene version=4.2
> use indexChecker ok.
> now I upgrade to Lucene 4.6 and put some new records to index.
> then reopen index, some files in indexdir missing....
> no .si files.
> I debug into it, new version format of segments.gen(segments_N) record bad
> segments info.
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