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https://issues.apache.org/jira/browse/HBASE-15325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15179780#comment-15179780
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ramkrishna.s.vasudevan commented on HBASE-15325:
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bq.He has not set allow partial on Scan. I think as per current code, it will
be 3 results
I think yes.
As per the current code, in case setBatch() is set and in between the batch
even if the size or time limit is reached we are not going to accumulate the
result and we are just going to send out the result what ever is available. In
that way if you see setBatch and setPartial both are going to be same. Batching
is another way of client saying am okie with partial results but the difference
is he expects what is the number of partial results whereas in another case of
setPArtial he may not be aware explicitly as how many results will be available
in one next() call.
Or if we don't want to change the meaning of setBatch and saying it as partial
then the current patch should handle setBatch case also as how we accumulate
results till the count set in setBatch is reached in case the results don't
fill up as expected.
> 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
> Attachments: 15325-test.txt, HBASE-15325-v1.txt, 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-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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