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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2073) Document issues involved in building your index with one jdk version and then searching/updating with another
Date Tue, 17 Nov 2009 10:46:39 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12778815#action_12778815
] 

Uwe Schindler commented on LUCENE-2073:
---------------------------------------

How about adding a general note into some JRE_VERSION_MIGRATION.txt on each release, also
add this to the non-version specific site docs?
The first version that would contain it in the distribution would be 3.0, but it should be
noted on the site-docs, that this affects *all* versions. Something like "whenever you change
JRE major versions 1.4 -> 1.5 -> 1.6 -> 1.7 you may have to reindex, because the
underlying VM's Unicode version could have changed in a way, affecting your tokenizers."

> Document issues involved in building your index with one jdk version and then searching/updating
with another
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-2073
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2073
>             Project: Lucene - Java
>          Issue Type: Task
>            Reporter: Mark Miller
>
> I think this needs to go in something of a permenant spot - this isn't a one time release
type issues - its going to present over multiple release.
> {quote}
> If there is nothing we can do here, then we just have to do the best we can -
> such as a prominent notice alerting that if you transition JVM's between building and
searching the index and you are using or doing X, things will break.
> We should put this in a spot that is always pretty visible - perhaps even a new readme
file titlted something like IndexBackwardCompatibility or something, to which we can add other
tips and gotchyas as they come up. Or MaintainingIndicesAcrossVersions, or FancyWhateverGetsYourAttentionAboutUpgradingStuff.
Or a permanent entry/sticky entry at the top of Changes.
> {quote}

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