[jira] [Updated] (HBASE-15097) When the scan operation covered two regions,sometimes the final results have duplicated rows.

[chenrongwei (JIRA)]

     [ 
https://issues.apache.org/jira/browse/HBASE-15097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

chenrongwei updated HBASE-15097:
--------------------------------
    Description: 
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 RegionScannerImpl,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();
                }
            }

  was: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.


> 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
>             Fix For: 1.1.2
>
>   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 RegionScannerImpl,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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