Comment 2 for bug 1172133

Daniel,

If a PXC cluster is replicating from an async master, log_slave_updates is required on the node acting as async slave. If this is turned off, events from async master is only replicated to that node not the whole cluster - as such ptc have not knowledge of this and waits indefinitely.

I think this can be fixed with ptc knowing the topology and this requirement - the requirement for log_slave_updates I think is never gonna change.