[jira] [Assigned] (HBASE-16283) Batch Append/Increment will always fail if set ReturnResults to false

["Ted Yu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-16283?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ted Yu reassigned HBASE-16283:
------------------------------

    Assignee: Allan Yang

> Batch Append/Increment will always fail if set ReturnResults to false
> ---------------------------------------------------------------------
>
>                 Key: HBASE-16283
>                 URL: https://issues.apache.org/jira/browse/HBASE-16283
>             Project: HBase
>          Issue Type: Bug
>          Components: API
>    Affects Versions: 2.0.0, 1.1.5, 1.2.2
>            Reporter: Allan Yang
>            Assignee: Allan Yang
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: FailedCase.java, HBASE-16283.patch, HBASE-16283v2.patch, HBASE-16283v3.patch
>
>
> If set Append/Increment's ReturnResult attribute to false, and batch the appends/increments to server. The batch operation will always return false.
> The reason is that, since return result is set to false, append/increment will return null instead of Result object. But in ResponseConverter#getResults, there is some check code 
> {code}
> if (requestRegionActionCount != responseRegionActionResultCount) {
>       throw new IllegalStateException("Request mutation count=" + requestRegionActionCount +
>           " does not match response mutation result count=" + responseRegionActionResultCount);
>     }
> {code}
> That means if the result count is not meet with request mutation count, it will fail the request.
> The solution is simple, instead of returning a null result, returning a empty result if ReturnResult set to false.



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