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https://issues.apache.org/jira/browse/HBASE-15325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15196839#comment-15196839
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ramkrishna.s.vasudevan commented on HBASE-15325:
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bq.Sorry I didn't catch your point, could you mind explain more?
I think I got it now. Reading the patch once again. The point that I was
mentioning was the case when the batch had to fetch the same row again (even in
reverse case). That time the compareRows shuld be 0.
Now in the other case where we have Row3 already in the cache and now we got
Row 2, it is correct to do the negation and check it.
The other suggestion 'retryAfterOutOfOrderException ' may be you can check once
(I may be wrong) and add it another patch.
Thanks [~yangzhe1991].
> ResultScanner allowing partial result will miss the rest of the row if the
> region is moved between two rpc requests
> -------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-15325
> URL: https://issues.apache.org/jira/browse/HBASE-15325
> Project: HBase
> Issue Type: Bug
> Components: dataloss, Scanners
> Affects Versions: 1.2.0, 1.1.3
> Reporter: Phil Yang
> Assignee: Phil Yang
> Priority: Critical
> Fix For: 2.0.0, 1.3.0, 1.2.1, 1.1.4, 1.4.0
>
> Attachments: 15325-test.txt, HBASE-15325-v1.txt,
> HBASE-15325-v10.patch, HBASE-15325-v2.txt, HBASE-15325-v3.txt,
> HBASE-15325-v5.txt, HBASE-15325-v6.1.txt, HBASE-15325-v6.2.txt,
> HBASE-15325-v6.3.txt, HBASE-15325-v6.4.txt, HBASE-15325-v6.5.txt,
> HBASE-15325-v6.txt, HBASE-15325-v7.patch, HBASE-15325-v8.patch,
> HBASE-15325-v9.patch
>
>
> HBASE-11544 allow scan rpc return partial of a row to reduce memory usage for
> one rpc request. And client can setAllowPartial or setBatch to get several
> cells in a row instead of the whole row.
> However, the status of the scanner is saved on server and we need this to get
> the next part if there is a partial result before. If we move the region to
> another RS, client will get a NotServingRegionException and open a new
> scanner to the new RS which will be regarded as a new scan from the end of
> this row. So the rest cells of the row of last result will be missing.
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