mysql cluster ndb problem.who can help me ~

[fu zhibo]

hello
I use the mysql cluster using ndb storage engine.when I am loading some datas into database ,i meet a problem ,I don't know where the problem is and how to solve it.

problem :
ndb_mgm> Node 2: Forced node shutdown completed. Initiated by signal 0. Caused by error 2303: 'System error, node killed during node restart by other node(Internal error, programming error or missing error message, please report a bug). Temporary error, restart no

here is my cluster configuration:
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=2 @10.37.6.36 (Version: 5.0.22, Nodegroup: 0)
id=3 @10.37.6.35 (Version: 5.0.22, Nodegroup: 0, Master)

[ndb_mgmd(MGM)] 1 node(s)
id=1 @10.37.6.37 (Version: 5.0.22)

[mysqld(API)] 1 node(s)
id=4 @10.37.6.36 (Version: 5.0.22)

here is my config.ini:
[NDBD DEFAULT]
Noofreplicas=2
MaxNoofConcurrentOperations=1000000
DataMemory=1000M
IndexMemory=100M
TimeBetweenLocalCheckpoints = 6
TimeBetweenGlobalCheckpoints = 1000
TimeBetweenWatchDogCheck = 40000
MaxNoOfAttributes = 5000
NoOfFragmentLogFiles = 16
[MYSQLD DEFAULT]
[NDB_MGMD DEFAULT]
[TCP DEFAULT]
#Management server
[NDB_MGMD]
HostName=10.37.6.37
DataDir=/home/var/lib/mysql-cluster
#storage engine
[NDBD]
HostName=10.37.6.36

who can help me ?
best regards