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https://issues.apache.org/jira/browse/LUCENE-5863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14128858#comment-14128858
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Robert Muir commented on LUCENE-5863:
-------------------------------------
FYI: the tests work.
As soon as I added 4.0-BETA index, test failed:
{noformat}
[junit4] 2> NOTE: reproduce with: ant test
-Dtestcase=TestBackwardsCompatibility -Dtests.method=testAddOldIndexes
-Dtests.seed=5B7356B8D3654E5F -Dtests.locale=no_NO_NY
-Dtests.timezone=Etc/GMT+3 -Dtests.file.encoding=UTF-8
[junit4] ERROR 0.24s | TestBackwardsCompatibility.testAddOldIndexes <<<
[junit4] > Throwable #1: java.io.IOException: file "_0.si" was already
written to
[junit4] > at
__randomizedtesting.SeedInfo.seed([5B7356B8D3654E5F:F786ADBD20A42A27]:0)
[junit4] > at
org.apache.lucene.store.MockDirectoryWrapper.createOutput(MockDirectoryWrapper.java:528)
[junit4] > at
org.apache.lucene.index.SegmentInfos.write3xInfo(SegmentInfos.java:610)
[junit4] > at
org.apache.lucene.index.SegmentInfos.write(SegmentInfos.java:535)
[junit4] > at
org.apache.lucene.index.SegmentInfos.prepareCommit(SegmentInfos.java:1033)
{noformat}
I then did "svn update" to bring in the fixes from LUCENE-5934, and then it
passes.
> Generate backwards compatibility indexes for all 4.x releases
> -------------------------------------------------------------
>
> Key: LUCENE-5863
> URL: https://issues.apache.org/jira/browse/LUCENE-5863
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Attachments: testTheBWCTester.py
>
>
> Currently the versioning here is a total mess, and its inconsistent across
> bugfix releases.
> We should just generate back compat indexes for every release: regardless of
> whether the index format changed, even for bugfix releases. This ensures at
> least we try to test that the back compat is working.
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