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call mtr.add_suppression("Can't create thread to");
SET @old_debug= @@GLOBAL.debug;
SET @orig_max_connections= @@global.max_connections;
connect con1, localhost, root,,mysql;
SELECT 1;
1
1
connect con2, localhost, root,,mysql;
SELECT 1;
1
1
connect con3, localhost, root,,mysql;
SELECT 1;
1
1
SET GLOBAL debug= '+d,fail_thread_create';
connect(localhost,root,,mysql,MYSQL_PORT,MYSQL_SOCK);
connect con4, localhost, root,,mysql;
ERROR HY000: Can't create a new thread (errno 1); if you are not out of available memory, you can consult the manual for a possible OS-dependent bug
connection default;
SET GLOBAL debug="-d,fail_thread_create";
disconnect con1;
disconnect con2;
disconnect con3;
SET GLOBAL max_connections= 3;
connect con1, localhost, root,,mysql;
connect con2, localhost, root,,mysql;
connect con3, localhost, root,,mysql;
connect(localhost,root,,mysql,MYSQL_PORT,MYSQL_SOCK);
connect con4, localhost, root,,mysql;
ERROR HY000: Too many connections
connection default;
disconnect con1;
disconnect con2;
disconnect con3;
SET GLOBAL debug= '+d,simulate_resource_failure';
call mtr.add_suppression("Out of memory");
connect(localhost,root,,mysql,MYSQL_PORT,MYSQL_SOCK);
connect con1, localhost, root,,mysql;
ERROR HY000: Lost connection to MySQL server at 'reading initial communication packet', system error: NUM
connection default;
SET GLOBAL debug= '-d,simulate_resource_failure';
SET GLOBAL debug= @old_debug;
SET GLOBAL max_connections= @orig_max_connections;