Hi, I noticed that 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', so I think 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. Is it supposed to work like this? If not I can create a Jira and fix the issue. Thanks, Peter [1] https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedScannerCallable.java#L89-L90 [2] https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallable.java#L139-L140 [3] https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedScannerCallable.java#L143-L144
