How to resolve "Lock wait timeout exceeded" issue reported by MySQL Cluster

[Jingyu Hu]

When our system busy with SQL update logic in MySQL Cluster, it report below info:
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Lock wait timeout exceeded; try restarting transaction; nested exception is java.sql.SQLException: Lock wait timeout exceeded; try restarting transactionCaused by: java.sql.SQLException: Lock wait timeout exceeded; try restarting transaction
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Is MySQL cluster NDB engine different to Innodb, that difference lead this issue ?

Or there is no difference between NDB and Innodb about SQL Lock logic, that happened comes from our system logic ?

Could you help to give me more suggestions to resolve this issue ?

Best Regards,
Hu Jingyu