connection node_2;
connection node_1;
call mtr.add_suppression("WSREP: Unknown parameter 'a'");
call mtr.add_suppression("WSREP: Set options returned 7");
SET GLOBAL wsrep_provider_options=NULL;
ERROR HY000: Incorrect arguments to SET
SET GLOBAL wsrep_provider_options='';
SET GLOBAL wsrep_provider_options=' ';
SET GLOBAL wsrep_provider_options='a=1';
ERROR HY000: Incorrect arguments to SET