void replicated() {
      if (rpcCall != null) {
        rpcCall.releaseByWAL();
      }
    }
Should be called regardless of the result of the replicating operation. Unless you still want
to reuse this entry, otherwise you must call this method to release the possible off heap
memories.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/regionreplication/RegionReplicationSink.java