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NDB – Forced node shutdown completed. Caused by error 2341: ‘Internal program error (failed ndbrequire)

recently while working on MySQL cluster 7.3.5, we came across this error

Forced node shutdown completed. Caused by error 2341: 'Internal program error (failed ndbrequire)(Internal error, programming error or missing error message, please report a bug). Temporary error, restart node'.

The management nodes would start up but

the data nodes would complete phase 1 & shutdown, some times at phase 2 and some times at phase 5.

The error one would see in the trace file would be as follows:

Status: Temporary error, restart node
Message: Internal program error (failed ndbrequire) (Internal error, programming error or missing error message, please report a bug)
Error: 2341
Error data: CREATE_TABLE_REF
Error object: NDBCNTR (Line: 2493) 0x00000003
Program: ndbd

How did we resolve it ?

First, few of our data nodes had an incorrect connect-string

Second, we had pre-assigned NodeGroups for the data …

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