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https://issues.apache.org/jira/browse/HADOOP-1913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

stack updated HADOOP-1913:
--------------------------

    Status: In Progress  (was: Patch Available)

Retry.  Failure was in org.apache.hadoop.hbase.TestRegionServerAbort.   It 
timed out.  The logging profile looks like what we were seeing over in 
HADOOP-1924.  Need to get some thread dumps to confirm.

> [HBase] Build a Lucene index on an HBase table
> ----------------------------------------------
>
>                 Key: HADOOP-1913
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1913
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: contrib/hbase
>            Reporter: Ning Li
>            Priority: Minor
>             Fix For: 0.15.0
>
>         Attachments: build_table_index.patch, 
> build_table_index.take2.again.patch, build_table_index.take2.patch, 
> build_table_index.take3.patch, build_table_index.take4.patch, 
> build_table_index.take5.patch
>
>
> This patch provides a Reducer class and other related classes which help to 
> build a Lucene index on an HBase table. The index build part is similar to 
> that of Nutch.
>   - Each row is modeled as a Lucene document: row key is indexed in its 
> untokenized form, column name-value pairs are Lucene field name-value pairs.
>   - IndexConf is used to configure various Lucene parameters, specify whether 
> to optimize an index and which columns to index and/or store, in tokenized or 
> untokenized form, etc.
>   - The number of reduce tasks decides the number of indexes (partitions). 
> The index(es) is stored in the output path of job configuration.
>   - The index build process is done in the reduce phase. Users can use the 
> map phase to join rows from different tables or to pre-parse/analyze column 
> content, etc.
>   - A junit test is added to test the build of an index on an HBase table 
> with an identity mapper. It also serves as an example on how to use the new 
> classes.
>   - BuildTableIndex is provided to help building an index on an HBase table. 
> It should be moved to examples package if HBase decides to have one.
> This patch requires the inclusion of the Lucene library.

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