[MySQL TroubleShooting] Service Startup error,

[MySQL TroubleShooting] Service Startup error,

A friend sent a startup error stack. When Skip_Grant_Table is started, no error is reported:

The experts in the Group found out that the udf_initv UDF reported an error.

 

But I still cannot figure out why do I need to run a UDF when the service is started?

There is a piece of code in mysqld_main:

If (! Opt_noacl) {# ifdef HAVE_DLOPEN udf_init (); # endif}

Here, opt_noacl is the skip_grant_table parameter. If opt_noacl = 1 is not set, otherwise it is 0, so skip_grant_table is not set, it will enter udf_init and initialize the UDF. If there is a problem with the UDF, the service cannot be started.