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https://issues.apache.org/jira/browse/HBASE-15097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15113578#comment-15113578
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Anoop Sam John commented on HBASE-15097:
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bq.,I said no,if we set the correct stop row,then it will not happen,because
the error will not happen at the last region.
I mean when the user specified Scan do not have any stop row. Then as per the
patch also, we wont be setting the stop row. In that case will it be possible
to get a row out of it boundary from this region?
> When the scan operation covered two regions,sometimes the final results have
> duplicated rows.
> ---------------------------------------------------------------------------------------------
>
> Key: HBASE-15097
> URL: https://issues.apache.org/jira/browse/HBASE-15097
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 1.1.2
> Environment: centos 6.5
> hbase 1.1.2
> Reporter: chenrongwei
> Assignee: chenrongwei
> Attachments: HBASE-15097-v001.patch, HBASE-15097-v002.patch,
> HBASE-15097-v003.patch, HBASE-15097-v004.patch, output.log, rowkey.txt,
> snapshot2016-01-13 pm 8.42.37.png
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> When the scan operation‘s start key and end key covered two regions,the first
> region returned the rows which were beyond of its' end key.So,this finally
> leads to duplicated rows in the results.
> To avoid this problem,we should add a judgment before setting the variable
> "stopRow" in the class of HRegion,like follow:
> if (Bytes.equals(scan.getStopRow(), HConstants.EMPTY_END_ROW) &&
> !scan.isGetScan()) {
> this.stopRow = null;
> } else {
> if (Bytes.compareTo(scan.getStopRow(),
> this.getRegionInfo().getEndKey()) >= 0) {
> this.stopRow = this.getRegionInfo().getEndKey();
> } else {
> this.stopRow = scan.getStopRow();
> }
> }
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