log_error = /var/log/mysqld.log
log_error_verbosity = 3
1
2
3
ERROR
ERROR, WARNING
ERROR, WARNING, INFORMATION
A single-quoted, comma seperated list of error numbers (with or without leading MY- and with or without leading zeros) or symbolic error codes. E.g. to suppress "Can't create database..." errors you could use...
log_error_suppression_list = 'ER_CANT_CREATE_DB,ER_DB_CREATE_EXISTS'
Symbolic values are recommendedFLUSH ERROR LOGS;