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https://issues.apache.org/jira/browse/HBASE-6049?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhihong Yu updated HBASE-6049:
------------------------------

    Fix Version/s: 0.94.1
                   0.96.0
     Hadoop Flags: Reviewed

@Stack:
Do you think patch v3 can be integrated ?
                
> Serializing "List" containing null elements will cause NullPointerException 
> in HbaseObjectWritable.writeObject()
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-6049
>                 URL: https://issues.apache.org/jira/browse/HBASE-6049
>             Project: HBase
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.94.0
>            Reporter: Maryann Xue
>             Fix For: 0.96.0, 0.94.1
>
>         Attachments: 6049-v3.patch, HBASE-6049-v2.patch, HBASE-6049-v3.patch, 
> HBASE-6049.patch
>
>
> An error case could be in Coprocessor AggregationClient, the median() 
> function handles an empty region and returns a List Object with the first 
> element as a Null value. NPE occurs in the RPC response stage and the 
> response never gets sent.

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