com.mysql.clusterj.ClusterJDatastoreException: Datastore exception. Return code: -1 Error code: 410 MySQL code: -1 Status: 1 Classification: 9 Message: (no replies)

Hi,

my_cluster -version 7.2.6

I have two ndb nodes each with 32G RAM and 8 core processer. I am having load of 3million accounts.
When I start aggregating data in my bucket after few hours i get "com.mysql.clusterj.ClusterJDatastoreException: Datastore exception. Return code: -1 Error code: 410 MySQL code: -1 Status: 1 Classification: 9 Message:my_table_name"

I tried to tweak many parameters but no luck. Here is my config.ini

[ndb_mgmd]
hostname=myhost
datadir=/home/peamp01/mysql/my_cluster/ndb_data
PortNumber=5060
NodeId=41
[ndbd default]
#MemReportFrequency=30
noofreplicas=2
RedoBuffer=512M
TransactionBufferMemory=12M
LongMessageBuffer=8M
#LockPagesInMainMemory=1
NoOfFragmentLogFiles=100
DataMemory=16G
IndexMemory=1G
MaxNoOfConcurrentTransactions=100000
MaxNoOfLocalOperations=110000
MaxNoOfConcurrentOperations=100000
MaxNoOfConcurrentIndexOperations=100000
MaxNoOfExecutionThreads =4
#RealtimeScheduler=1

[tcp default]
SendBufferMemory=12M

[ndbd]
hostname=node-1.net
datadir=/data/users/amp01/ndb/node42_data
NodeId=42

[ndbd]
hostname=node-2.net
datadir=/data/users/amp01/ndb/node43_data
NodeId=43


[mysqld]
NodeId=45
hostname=myhost

[mysqld]
NodeId=47

[api]

[api]

[api]

[api]

======================
I am starting these nodes with ndbmtd.
Please suggest the missing settings i should try.