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https://issues.apache.org/jira/browse/LUCENE-5939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14130785#comment-14130785
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Ryan Ernst commented on LUCENE-5939:
------------------------------------
I started to try and regenerate all the indexes for previous versions which
Robert did not handle in LUCENE-5863. However, I already found something odd
with 4.9.0. Running check index (from 4.10) on the regen index I get:
{noformat}
Segments file=segments_3 numSegments=5 version=4.9.0 format=
1 of 5: name=_0 docCount=10
version=4.9.0
codec=Lucene49
compound=true
numFiles=4
size (MB)=0.008
diagnostics = {timestamp=1410470919104, os=Mac OS X, os.version=10.9.4,
lucene.version=4.9-SNAPSHOT, source=flush, os.arch=x86_64,
java.version=1.7.0_60, java.vendor=Oracle Corporation}
....
{noformat}
Notice under diagnostics, {{lucene.version=4.9-SNAPSHOT}}. I checked this tag
out:
http://svn.apache.org/repos/asf/lucene/dev/tags/lucene_solr_4_9_0/
So then I checked lucene/common-build.xml, and {{version}} is indeed set to
4.9-SNAPSHOT. I then downloaded the official source release, and there too the
version was 4.9-SNAPSHOT.
But, this is only the "display version", so I don't think it matters (as far as
backcompat is concerned)? I am going to consider this ok and continue with the
generating the other indexes.
> 4.10.1 cannot read 4.10 indexes
> -------------------------------
>
> Key: LUCENE-5939
> URL: https://issues.apache.org/jira/browse/LUCENE-5939
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Priority: Blocker
>
> Thank you mike for the smoketester addition. It failed because 4.10.1 was not
> verifying backwards compatibility against 4.10
> However, when i added the indexes (svn copied from branch-4x), the test fails.
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