Got error 4008 'Receive from NDB failed' (no replies)

Hello,

When I launch the query:

> select * from extra_data where data_payload LIKE '%Simbar%' OR data_payload LIKE '%53696D626172%';

I get the following error after several minutes:

ERROR 1296 (HY000): Got error 4008 'Receive from NDB failed' from NDBCLUSTER
mysql

What could be the problem?

The schema:

CREATE TABLE `extra_data` (
`sid` bigint(20) NOT NULL,
`cid` bigint(20) NOT NULL,
`data_payload` varchar(2500) DEFAULT NULL,
`filename` varchar(255) DEFAULT NULL,
`username` varchar(512) DEFAULT NULL,
PRIMARY KEY (`sid`,`cid`),
KEY `payload` (`data_payload`)
) /*!50100 TABLESPACE ts_1 STORAGE DISK */ ENGINE=ndbcluster DEFAULT CHARSET=latin1


As far as I know, although no index cannot be used because the wildcard (%), the Engine Condition Pushdown Optimization should works fine:

mysql> explain select * from extra_data where data_payload LIKE '%Simbar%' OR data_payload LIKE '%53696D626172%'\G
*************************** 1. row ***************************
id: 1
select_type: SIMPLE
table:
type: ALL
possible_keys: NULL
key: NULL
key_len: NULL
ref: NULL
rows: 6897834
Extra: Using where with pushed condition
1 row in set (0.00 sec)

I am using Mysql Cluster 7.2.5 with one node group and two nodes. Is there any parameter should be changed?


Thanks in advanced,