Bug #48143 ndb_mgmd - crash in CONFIG_CHECK_REF

Description:
The CONFIG_CHECK that each ndb_mgmd run to check that all connected ndbd_mgmd's have the same configuration may fail with an assert if a configuration change occurs while the check is ongoing. A configuration change is allowed to take place during the check and the check should simply be scheduled to be run again at a later time when the configuration change has completed.

How to repeat:
testMgmd

Suggested fix:
Drop the CONFIG_CHECK_REF and thus cause the check to be run again later.

Pushed to 7.0

Documented bugfix in the NDB-7.0.10 changelog as follows:

        The configuration check that each management server runs to
        verify that all connected ndbd_mgmd processes have the same
        configuration could fail when a configuration change took place
        while this check was in progress. Now in such cases, the
        configuration check is rescheduled for a later time, after the
        change is complete.

Closed.