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https://issues.apache.org/jira/browse/LUCENE-3607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13158785#comment-13158785
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Robert Muir commented on LUCENE-3607:
-------------------------------------
If you really want to have a fully reproducable index (and not knowing the
parameters of what that means,
and not understanding what the use case here is doesn't help) it seems like you
need to do a lot more work?
What if we want to put something in the diagnostics map in the future to assist
with debugging? its already going to change
dependent upon your JVM and os settings (e.g. diagnostics =
{os.version=3.0.0-12-generic, os=Linux, lucene.version=4.0-SNAPSHOT,
source=flush, os.arch=amd64, java.version=1.7.0_01, java.vendor=Oracle
Corporation}), and thats just one example.
To me thats totally fair game for us to do, if it helps debugging. So I dont
think we should commit ourselves
to this faithful reproduction.
if you really really really are against this at the end of the day, in trunk
you can implement your own
segments file reader/writer in a codec, and write 0 for version and no
diagnostics maps and other things...
> Lucene Index files can not be reproduced faithfully (due to timestamps
> embedded)
> --------------------------------------------------------------------------------
>
> Key: LUCENE-3607
> URL: https://issues.apache.org/jira/browse/LUCENE-3607
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/index
> Affects Versions: 2.9.1
> Environment: Eclipse 3.7
> Reporter: Martin Oberhuber
> Assignee: Michael McCandless
>
> Eclipse 3.7 uses Lucene 2.9.1 for indexing online help content. A
> pre-generated help index can be shipped together with online content. As per
> [[https://bugs.eclipse.org/bugs/show_bug.cgi?id=364979 ]]
> it turns out that the help index can not be faithfully reproduced during a
> build, because there are timestamps embedded in the index files, and the
> "NameCounter" field in segments_2 contains different contents on every build.
> Not being able to faithfully reproduce the index from identical source bits
> undermines trust in the index (and software delivery) being correct.
> I'm wondering whether this is a known issue and/or has been addressed in a
> newer Lucene version already ?
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