Cluster Node - Error data: Arbitrator decided to shutdown this node (5 replies)

Hi,
Our cluster node shutdown and gives us this error. What may be the problem who shutdown cluster node?


-bash-3.2# tail -n 1000 -f /cage_ext1/mysql-cluster/ndb_2_error.log
Current byte-offset of file-pointer is: 568

Time: Thursday 30 September 2010 - 18:21:53
Status: Temporary error, restart node
Message: Node lost connection to other nodes and can not form a unpartitioned cluster, please investigate if there are error(s) on other node(s) (Arbitration error)
Error: 2305
Error data: Arbitrator decided to shutdown this node
Error object: QMGR (Line: 5595) 0x00000002
Program: ndbd
Pid: 2890
Version: mysql-5.1.47 ndb-7.1.5
Trace: /cage_ext1/mysql-cluster//ndb_2_trace.log.1
***EOM***

Thanks.