HBASE-7325 Replication reacts slowly on a lightly-loaded cluster (Gabriel Reid via JD)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1511378 13f79535-47bb-0310-9956-ffa450edef68

hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSource.java

@@ -336,6 +336,10 @@ public class ReplicationSource extends Thread
               this.replicationQueueInfo.isQueueRecovered(), currentWALisBeingWrittenTo);
           this.lastLoggedPosition = this.repLogReader.getPosition();
         }
+        // Reset the sleep multiplier if nothing has actually gone wrong
+        if (!gotIOE) {
+          sleepMultiplier = 1;
+        }
         if (sleepForRetries("Nothing to replicate", sleepMultiplier)) {
           sleepMultiplier++;
         }