MySQL Cluster: The table is full (no replies)

I have a problem with MySQL Cluster.

I created a table in order to be stored in the disk but i think it's always stored in memory.

I have have created a table with the query below:

CREATE TABLE IF NOT EXISTS user (
`FIELD_KEY` varchar(255) NOT NULL,
`FIELD0` text,
`FIELD1` text,
`FIELD2` text,
`FIELD3` text,
`FIELD4` text,
`FIELD5` text,
`FIELD6` text,
`FIELD7` text,
`FIELD8` text,
`FIELD9` text,
PRIMARY KEY (YCSB_KEY)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8 max_rows=40000000 TABLESPACE ts_1 STORAGE DISK;
ALTER TABLE usertable4M PARTITION BY KEY() PARTITIONS 4
----------------
My Environment (3 nodes in the same VM):
MySQL Cluster 7.5

management nodes: 1
data node: 1
sql nodes: 1
VM Config : 16GB RAM, 100GB HDD
----------------
MySQL Cluster settings (config.ini) are set to:

[ndbd default]
noofreplicas=1
DataMemory=2048M
# Memory to allocate for index storage
IndexMemory=1024M
# To support multi-thread processors
MaxNoOfExecutionThreads=2
FragmentLogFileSize=256M
NoOfFragmentLogFiles=12
#
RedoBuffer=32M
SharedGlobalMemory=256M
DiskPageBufferMemory=4096M
NoOfFragmentLogParts = 4
#
[ndb_mgmd]
HostName=192.168.1.10
DataDir=/var/lib/mysql-cluster

[ndbd]
HostName=192.168.1.10
NodeId=2
DataDir=/usr/local/mysql/data

[mysqld]
HostName=192.168.1.10
----------------
In order to store data in Disk I created a LOGFILE and TABLESPACE with the queries below:

CREATE LOGFILE GROUP lg ADD UNDOFILE 'undo1.dat'
INITIAL_SIZE=12288M
UNDO_BUFFER_SIZE=32M
ENGINE=NDB;

CREATE TABLESPACE ts_1
ADD DATAFILE 'data1.dat'
USE LOGFILE GROUP lg
INITIAL_SIZE=256M
ENGINE=NDB;

ALTER TABLESPACE ts_1 ADD DATAFILE 'data2.dat' INITIAL_SIZE=256M ENGINE=NDB;
.
.
.
ALTER TABLESPACE ts_1 ADD DATAFILE 'data24.dat' INITIAL_SIZE=256M ENGINE=NDB;
----------------
MemoryUsage report

$ sudo ndb_mgm -e 'all report MemoryUsage'
Connected to Management Server at: 192.168.1.10:1186
Node 2: Data usage is 94%(62259 32K pages of total 65536)
Node 2: Index usage is 2%(2801 8K pages of total 131104)
----------------
When I ran a query to insert 4000000 records (4GB) to my table I get the error (The table 'user' is full) and can not insert data any more to the table and only 1611787 records has been inserted. I don't understand why it is so.

Could somebody explain me what is the situation. And how can I resolve the problem.