# Flowable Open Source Availability and Concurreny **URL:** \ **Category:** Flowable Engine\ **Created:** [June 5, 2025, 1:52pm UTC](https://forum.flowable.org/t/flowable-open-source-availability-and-concurreny/12273 "2025-06-05T13:52:39Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![KevinV652](https://avatars.discourse-cdn.com/v4/letter/k/d2c977/32.png) [@KevinV652](https://forum.flowable.org/u/KevinV652)\ **Post date:** [June 5, 2025, 1:52pm UTC](https://forum.flowable.org/t/flowable-open-source-availability-and-concurreny/12273/1 "2025-06-05T13:52:39Z")
Hi. I’m Working on a BPMN process with Flowable Open Source currently, but now I’m having a problem the Flowable Rest API in Docker. I’m trying to prove the concurrency and availability of this software, making like 20 BPMN instances per minute for about 5 minutes in total. I’m having problems and the logs just tell me about an “Execution Error”, Even if I try it with async. Is this related with the limits of Open Source Version? I tried to configure the properties of the Hikari Pool, Executor Queue Size, Http max total connections, etc. ---
**Author:** ![WelschChristopher](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/welschchristopher/32/2822_2.png) [@WelschChristopher](https://forum.flowable.org/u/WelschChristopher)\ **Post date:** [June 5, 2025, 1:59pm UTC](https://forum.flowable.org/t/flowable-open-source-availability-and-concurreny/12273/2 "2025-06-05T13:59:28Z")
Hey Kevin, welcome to the forum! Can you please send the full logs. Regarding “limits”: There are no artificial limits set in open source. It’s the foundation used in Flowable Enterprise. Creating 20 BPMN instances per minute is not a problem at all. Obviously that always depends on your actual definition. I assume you are using a fairly simple process in your testing stage right? greetings Christopher