in case of raft or kafka, some time while electing a new Orderer Leader or if there is no leader available, orderering service don't respond or response come too late 300 sec or more.
1.make sure your all orderer's are up to date and part of the quorum. 2.there is always leader Orderer present.
to withstand n fault orderer nodes in kafka minimum number of orderering node for CFT = 3n + 1; in raft minimum number of orderering node for CFT = 2n + 1;