I know you are working on a solution to this but in the mean time I wanted to ask about how best to implement HA for flow files across a cluster. One option I saw was to use an NFS mount and if a node should fail start up another node and point it to the failed nodes repo. I also saw some comments about designing a workflow to auto recover. My guess is to do something place the flow file in directory and for the last step of a flow delete it. If it ages you know that it failed to process so reprocess. Just wanted to get your input.
Also any updates on a solution/timeframe if you have them.