Error while storing data on cluster. (no replies)

Hi,

We have two node cluster.
Following is the confing.ini set
[ndbd default]
BackupDataDir=/backup/mysql
BackupMaxWriteSize=1M
BackupDataBufferSize=16M
BackupLogBufferSize=16M
BackupMemory=32M
CompressedLCP=0
DataDir=/var/lib/mysql-cluster
DataMemory=8G
DiskCheckpointSpeed=10M
FragmentLogFileSize=42M
IndexMemory=768MB
LogLevelCheckpoint=8
LogLevelError=15
LogLevelNodeRestart=15
LogLevelStartup=15
LogLevelShutdown=15
LongMessageBuffer=12M
LockPagesInMainMemory=0
NoOfFragmentLogFiles=200
NoOfReplicas=2
MaxNoOfAttributes=1000
MaxNoOfConcurrentIndexOperations=100000
MaxNoOfConcurrentOperations=100000
MaxNoOfConcurrentTransactions=100000
MaxNoOfExecutionThreads=4
MaxNoOfLocalOperations=110000
MaxNoOfOrderedIndexes=128
MaxNoOfSubscribers=0
MaxNoOfTriggers=128
MaxNoOfTables=128
MaxNoOfUniqueHashIndexes=128
Odirect=1
RedoBuffer=512M
SharedGlobalMemory=128M
TimeBetweenEpochsTimeout=100
TimeBetweenGlobalCheckpoints=1000
TimeBetweenLocalCheckpoints=20
TimeBetweenWatchdogCheckInitial=60000
TransactionBufferMemory=32M
TransactionDeadlockDetectionTimeout=15000
TransactionInactiveTimeout=60000

When storing data on cluster i am getting following error,
com.mysql.clusterj.ClusterJDatastoreException: Datastore exception. Return code: -1 Error code: 1,234 MySQL code: -1 Status: 1 Classification: 7 Message: bucket_storage

PLease suggest config change i must focus on.

Thanks,
Sohan