Index: HRegionServer.java =================================================================== --- HRegionServer.java (revision 831259) +++ HRegionServer.java (working copy) @@ -439,7 +439,7 @@ // Send messages to the master IF this.msgInterval has elapsed OR if // we have something to tell (and we didn't just fail sending master). if ((now - lastMsg) >= msgInterval || - (outboundArray.length == 0 && !this.outboundMsgs.isEmpty())) { + ((outboundArray == null || outboundArray.length == 0) && !this.outboundMsgs.isEmpty())) { try { doMetrics(); MemoryUsage memory =