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# ==== Purpose ==== # # Wait for the number of servers in the group playing # the expected roles. # # ==== Usage ==== # # --let $group_replication_primaries_count_in_var=N # --let $group_replication_secondaries_count_in_var=M # [--let $wait_timeout= NUMBER] # [--let $rpl_debug= 1] # --source ../inc/gr_wait_for_role_count.inc --let $include_filename= gr_wait_for_role_count.inc --source include/begin_include_file.inc # lets wait until a new primary is elected because that's an # asynchronous procedure # count the primaries and secondaries in the group --let $_timeout= $wait_timeout --let $_ok= 0 # there are N - 1 secondaries, where N is the number of servers # in the group --let $_expected_secondaries= $group_replication_secondaries_count_in_var --let $_expected_primaries= $group_replication_primaries_count_in_var while ($_timeout > 0) { # count the primaries in the group --source ../inc/gr_count_primaries_secondaries.inc # there are N - 1 secondaries, where N is the number of servers # in the group --let $_counted_secondaries= $group_replication_count_secondaries_out_var # there is only one primary --let $_counted_primaries= $group_replication_count_primaries_out_var if (`SELECT $_counted_secondaries <> $_expected_secondaries OR $_counted_primaries <> $_expected_primaries`) { --sleep 1 --dec $_timeout } if (`SELECT $_counted_secondaries = $_expected_secondaries AND $_counted_primaries = $_expected_primaries`) { --let $_ok= 1 # bail out --let $_timeout= -1 } } # assert to display which is not matching expectations if (!$_ok) { --echo PRIMARIES: Expected=$_expected_primaries, Counted=$_counted_primaries --echo SECONDARIES: Expected=$_expected_secondaries, Counted=$_counted_secondaries --die "PRIMARIES and SECONDARIES count does not match expectations.". } --let $include_filename= gr_wait_for_role_count.inc --source include/end_include_file.inc