Clustering : IllegalStateException - Read operation on write-only transaction is not allowed

Not clear why a read is happening on a WRITE_ONLY transaction. This needs to be clarified but it seems to be related to something to do with subtransactions in broker transactions.

The problem is that with this exception essentially Inventory just does not work with Distributed DataStore. For the short term we may need to disable the check for this illegal state till we understand better what's happening.