Index: src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java =================================================================== --- src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java (revision 1068507) +++ src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java (working copy) @@ -504,6 +504,9 @@ } synchronized (updateLock) { + if (closed) { + return regionsToFlush; + } // Clean up current writer. Path oldFile = cleanupCurrentWriter(currentFilenum); this.writer = nextWriter;