Recent issues with "Waiting for bakup lock"
Some help please. Over the last couple of days, we're been having issues with our cluster. When a node goes down for some reason and starts coming back over SST, we've been getting a status of "Waiting for backup lock" when a "CREATE" or "DROP" table query is executed. Both are executed on InnoDB tables.
What this does is locks till the node is completely back up, which can take up to an hour. This renders the whole cluster unavailable during this time.
Any ideas what is causing this? I've been running this cluster for 4+ years and this is the first time seeing this.