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https://issues.apache.org/jira/browse/HBASE-15325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phil Yang updated HBASE-15325:
------------------------------
Description:
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.
was:
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 start of this row.
So we will see the cells which have been seen before.
> ResultScanner allowing partial result will missing 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
> Affects Versions: 1.1.3
> Reporter: Phil Yang
> Assignee: Phil Yang
> Priority: Critical
> Attachments: 15325-test.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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