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https://issues.apache.org/jira/browse/HBASE-2107?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12798894#action_12798894
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stack commented on HBASE-2107:
------------------------------
Thanks for patch Kay Kay.
> Upgrading Lucene 2.2 to Lucene 3.0.0
> -------------------------------------
>
> Key: HBASE-2107
> URL: https://issues.apache.org/jira/browse/HBASE-2107
> Project: Hadoop HBase
> Issue Type: Improvement
> Reporter: Kay Kay
> Fix For: 0.21.0
>
> Attachments: HBASE-2107.patch, HBASE-2107.patch, HBASE-2107.patch
>
>
> HBase has an utility to export columns as Lucene indices.
> (o.a.h.hbase.mapreduce.BuildTableIndex ) .
> This patch increases the version in libraries.properties and addresses some
> deprecations towards moving it.
> Rationale for upgradation:
> ====================
> A lot has been happening in the Lucene since 2.2, with improved performance
> and focus on NRT (Near Real Time search) happening recently. Hence - we need
> to keep up with the same and make the utility publish indices for the new
> version.
> Caveats:
> =======
> Index created by Lucene 3.0 is *not backward-compatible* with Lucene 2.2
> code. In other words - as part of this upgradation - indices need to be
> created all over again and the library interacting with the index ( readers /
> searchers ) need to be upgraded to the new version as well.
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