this is a feature request to port the following commit to MGC:
Bug1179805: wsrep variable to reject queries
This commit adds a variable wsrep_reject_queries which can take 3 values:
a) NONE - default - nothing is rejected.
b) ALL - all queries are rejected with 'Error 1047: Unknown command'.
c) ALL_KILL - all queries are rejected and existing ones are also
aborted without waiting.
Thanks in advance.