Index: hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java =================================================================== --- hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java (revision 1568326) +++ hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java (working copy) @@ -836,7 +836,7 @@ if (this.rsAccounting != null) { rsAccounting.addAndGetGlobalMemstoreSize(memStoreSize); } - return this.memstoreSize.getAndAdd(memStoreSize); + return this.memstoreSize.addAndGet(memStoreSize); } /** @return a HRegionInfo object for this region */