It would be good to support async continuations on Parallel Gateways. Usecase:
The parallel GW is a synchronizing GW and is thus subject to optimistic locking. If you I can make the parallel GW I can take advantage of the JobExecutor Retry mechanism for resolving the optimistic locking conflict without impacting the preceding tasks.

AT:

• camunda:async="" and camunda:exclusive="" are supported on Parallel GW.
• supported through model API
• docs are updated (including section on extension elements)
• include note in section about exclusive jobs.

==
See also: https://groups.google.com/d/msg/camunda-bpm-users/8fUx40_PhAs/bDW85AIz1GEJ