SHOW SLAVE STATUS is hung on another slave running a different version -- 5.6.20. mysql Ver 14.14 Distrib 5.6.20-68.0, for Linux (x86_64) using EditLine wrapper Server version: 5.6.20-68.0-log Percona Server (GPL), Release 68.0, Revision 656 mysql> show processlist; +------+----------------+---------------------+-------+---------+--------+----------------------------------------+-------------------------------+-----------+---------------+ | Id | User | Host | db | Command | Time | State | Info | Rows_sent | Rows_examined | +------+----------------+---------------------+-------+---------+--------+----------------------------------------+-------------------------------+-----------+---------------+ | 41 | SUSR_Heartbeat | 127.0.0.1:57331 | NULL | Query | 114854 | init | show slave status | 0 | 0 | | 48 | system user | | NULL | Connect | 130684 | Queueing master event to the relay log | NULL | 0 | 0 | | 49 | system user | | NULL | Connect | 193633 | Waiting for commit lock | NULL | 0 | 0 | | 796 | root | localhost | NULL | Query | 114894 | init | SHOW SLAVE STATUS | 0 | 0 | | 797 | SUSR_Monitor | 10.205.50.214:48181 | NULL | Query | 114876 | init | SHOW SLAVE STATUS | 0 | 0 | | 799 | SUSR_Heartbeat | 127.0.0.1:60307 | NULL | Query | 114794 | init | show slave status | 0 | 0 | | 800 | SUSR_Heartbeat | 127.0.0.1:60308 | NULL | Query | 114674 | init | show slave status | 0 | 0 | | 801 | SUSR_Heartbeat | 127.0.0.1:60309 | NULL | Query | 114734 | init | show slave status | 0 | 0 | | 845 | SUSR_Heartbeat | 127.0.0.1:60481 | NULL | Query | 114614 | init | show slave status | 0 | 0 | | 846 | SUSR_Heartbeat | 127.0.0.1:60482 | NULL | Query | 114494 | init | show slave status | 0 | 0 | | 847 | SUSR_Heartbeat | 127.0.0.1:60483 | NULL | Query | 114554 | init | show slave status | 0 | 0 | | 851 | SUSR_Heartbeat | 127.0.0.1:60492 | NULL | Query | 114434 | init | show slave status | 0 | 0 | | 852 | SUSR_Heartbeat | 127.0.0.1:60494 | NULL | Query | 114374 | init | show slave status | 0 | 0 | | 853 | SUSR_Heartbeat | 127.0.0.1:60495 | NULL | Query | 114314 | init | show slave status | 0 | 0 | | 857 | SUSR_Heartbeat | 127.0.0.1:60505 | NULL | Query | 114254 | init | show slave status | 0 | 0 | | 858 | SUSR_Heartbeat | 127.0.0.1:60506 | NULL | Query | 114194 | init | show slave status | 0 | 0 | | 859 | SUSR_Heartbeat | 127.0.0.1:60507 | NULL | Query | 114134 | init | show slave status | 0 | 0 | | 864 | SUSR_Heartbeat | 127.0.0.1:60518 | NULL | Query | 114074 | init | show slave status | 0 | 0 | | 865 | SUSR_Heartbeat | 127.0.0.1:60519 | NULL | Query | 114014 | init | show slave status | 0 | 0 | | 995 | root | localhost | NULL | Query | 107699 | init | SHOW SLAVE STATUS | 0 | 0 | | 1163 | root | localhost | NULL | Query | 101401 | init | SHOW SLAVE STATUS | 0 | 0 | | 1333 | root | localhost | NULL | Query | 93676 | init | SHOW SLAVE STATUS | 0 | 0 | | 1502 | root | localhost | NULL | Query | 86235 | init | SHOW SLAVE STATUS | 0 | 0 | | 1671 | root | localhost | NULL | Query | 78859 | init | SHOW SLAVE STATUS | 0 | 0 | | 1839 | root | localhost | NULL | Query | 72593 | init | SHOW SLAVE STATUS | 0 | 0 | | 2009 | root | localhost | NULL | Query | 64568 | init | SHOW SLAVE STATUS | 0 | 0 | | 2218 | root | localhost | NULL | Query | 57030 | init | SHOW SLAVE STATUS | 0 | 0 | | 2346 | root | localhost | NULL | Query | 50616 | init | SHOW SLAVE STATUS | 0 | 0 | | 2432 | root | localhost | mysql | Query | 47553 | init | SHOW SLAVE STATUS | 0 | 0 | | 2518 | root | localhost | NULL | Query | 43631 | init | SHOW SLAVE STATUS | 0 | 0 | | 2561 | SUSR_Monitor | 10.205.50.214:38001 | NULL | Query | 42104 | init | SHOW SLAVE STATUS | 0 | 0 | | 2645 | SUSR_Monitor | 10.205.50.214:42315 | NULL | Query | 38568 | init | SHOW SLAVE STATUS | 0 | 0 | | 2730 | root | localhost | NULL | Query | 35164 | init | SHOW SLAVE STATUS | 0 | 0 | | 2859 | root | localhost | NULL | Query | 28705 | init | SHOW SLAVE STATUS | 0 | 0 | | 3068 | root | localhost | NULL | Query | 20670 | init | SHOW SLAVE STATUS | 0 | 0 | | 3196 | root | localhost | NULL | Query | 15134 | init | SHOW SLAVE STATUS | 0 | 0 | | 3366 | root | localhost | NULL | Query | 7082 | init | SHOW SLAVE STATUS | 0 | 0 | | 3409 | SUSR_Monitor | 10.205.50.214:60686 | NULL | Query | 5536 | init | SHOW SLAVE STATUS | 0 | 0 | | 3535 | root | localhost | NULL | Query | 184 | init | SHOW /*innotop*/ SLAVE STATUS | 0 | 0 | | 3538 | root | localhost | NULL | Query | 8 | init | SHOW /*innotop*/ SLAVE STATUS | 0 | 0 | | 3539 | root | localhost | NULL | Query | 0 | init | show processlist | 0 | 0 | +------+----------------+---------------------+-------+---------+--------+----------------------------------------+-------------------------------+-----------+---------------+ 41 rows in set (0.00 sec)