Execution of async tasks slows down significantly with higher load

Solution Unverified - Updated -

Issue

We are observing slow process execution for processes with async tasks with higher load. We created a sample workflow to replicate the issue, where the
execution of the workflow is the following:

Start -> Sync Exec -> Async Exec-1-> Async Exec-2 -> Async Exec -3> Async Exec-4-> End

We the used Jmeter load suite and started a high number of process instance of this process. We observed that the execution of the sync nodes completed in seconds but that the async flow took several minutes before the process were finished.

Environment

  • Red Hat JBoss BPM Suite
    • 6.4.0

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