ERROR 1297 (HY000): Got temporary error 20008 'Query aborted due to out of query memory' from NDBCLUSTER (no replies)

Hello,

After implementing test cluster on 4 Azure Ubuntu large vms,
getting this error :
ERROR 1297 (HY000): Got temporary error 20008 'Query aborted due to out of query memory' from NDBCLUSTER,
When trying to execute large queries.

DB size is 8GB.

Cluster vesion gpl-7.3.4
Each machine has 7GB Ram, 4 core AMD CPU 2Ghz

config.ini:
[NDB_MGMD DEFAULT]
Portnumber=1186

[NDB_MGMD]
NodeId=49
HostName=maincdh-1
DataDir=/data/MySQL_Cluster/49/
Portnumber=1186

[NDB_MGMD]
NodeId=52
HostName=maincdh-2
DataDir=/data/MySQL_Cluster/52/
Portnumber=1186

[TCP DEFAULT]
SendBufferMemory=2M
ReceiveBufferMemory=2M

[NDBD DEFAULT]
BackupMaxWriteSize=1M
BackupDataBufferSize=16M
BackupLogBufferSize=4M
BackupMemory=20M
BackupReportFrequency=10
MemReportFrequency=30
LogLevelStartup=15
LogLevelShutdown=15
LogLevelCheckpoint=8
LogLevelNodeRestart=15
DataMemory=22G
IndexMemory=4G
MaxNoOfTables=4096
MaxNoOfTriggers=3500
NoOfReplicas=2
StringMemory=25
DiskPageBufferMemory=64M
SharedGlobalMemory=20M
LongMessageBuffer=32M
MaxNoOfConcurrentTransactions=16384
BatchSizePerLocalScan=512
FragmentLogFileSize=256M
NoOfFragmentLogFiles=21
RedoBuffer=32M
MaxNoOfExecutionThreads=4
StopOnError=false
LockPagesInMainMemory=1
TimeBetweenEpochsTimeout=32000
TimeBetweenWatchdogCheckInitial=60000
TransactionInactiveTimeout=60000
HeartbeatIntervalDbDb=1500
HeartbeatIntervalDbApi=1500

[NDBD]
NodeId=1
HostName=maincdh-1
DataDir=/data/MySQL_Cluster/1/

[NDBD]
NodeId=2
HostName=maincdh-2
DataDir=/data/MySQL_Cluster/2/

[NDBD]
NodeId=3
HostName=maincdh-3
DataDir=/data/MySQL_Cluster/3/

[NDBD]
NodeId=4
HostName=maincdh-4
DataDir=/data/MySQL_Cluster/4/

[MYSQLD DEFAULT]

[MYSQLD]
NodeId=50
HostName=maincdh-3

[MYSQLD]
NodeId=51
HostName=maincdh-4

[API]
NodeId=53
HostName=maincdh-3

[API]
NodeId=54
HostName=maincdh-4


Please Help