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From "Peter Somogyi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-18665) ReversedScannerCallable invokes getRegionLocations incorrectly
Date Wed, 23 Aug 2017 14:05:00 GMT
Peter Somogyi created HBASE-18665:

             Summary: ReversedScannerCallable invokes getRegionLocations incorrectly
                 Key: HBASE-18665
                 URL: https://issues.apache.org/jira/browse/HBASE-18665
             Project: HBase
          Issue Type: Bug
    Affects Versions: 2.0.0, 3.0.0, 1.4.0, 1.3.2, 1.5.0, 1.2.7, 1.1.13
            Reporter: Peter Somogyi
            Assignee: Peter Somogyi

The behavior of ReversedScannerCallable#prepare [1] and ScannerCallable#prepare [2] methods
differ how they call RpcRetryingCallerWithReadReplicas.getRegionLocations method.

The reversed scanner uses the 'reload' parameter directly as the first argument - RpcRetryingCallerWithReadReplicas.getRegionLocations(reload,
id, getConnection(), getTableName(), getRow()) - however, the forward scanner passes '!reload'.
The getRegionLocations first parameter is 'useCache', the way we use it in ScannerCallable
is the correct one.

The same call can be found in ReversedScannerCallable#locateRegionsInRange [3] also without
negating its value.

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