The problem:
There's two problems about asyncAfterSynchronization(com.arjuna.ats.arjuna.coordinator.asyncAfterSynchronization=true) option:

• If we want asyncAfterSynchronization, we must set asyncBeforeSynchronization
• When tx abort, and we have asyncAfterSynchronization option, there's exception

Root cause: TwoPhaseCoordinator.synchronizationCompletionService and TwoPhaseCoordinator.runningSynchronizations only inited in asyncBeforeSynchronization

Solution:
Also init TwoPhaseCoordinator.synchronizationCompletionService and TwoPhaseCoordinator.runningSynchronizations in asyncAfterSynchronization