# Gatling Simulation Completed - However seeing AsyncHandlerActor Pool hasn't been started error frequently

**URL:** <https://community.gatling.io/t/gatling-simulation-completed-however-seeing-asynchandleractor-pool-hasnt-been-started-error-frequently/1713>\
**Category:** Gatling (Open-Source)\
**Created:** [November 17, 2014, 1:33pm UTC](https://community.gatling.io/t/gatling-simulation-completed-however-seeing-asynchandleractor-pool-hasnt-been-started-error-frequently/1713 "2014-11-17T13:33:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Guest](https://avatars.discourse-cdn.com/v4/letter/g/8dc957/32.png) [@Guest](https://community.gatling.io/u/Guest)\
**Post date:** [November 17, 2014, 1:33pm UTC](https://community.gatling.io/t/gatling-simulation-completed-however-seeing-asynchandleractor-pool-hasnt-been-started-error-frequently/1713/1 "2014-11-17T13:33:44Z")

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Hello Gatling Experts,

I am seeing following error at end of simulation frequently. Could you please advise if I need to tune test environment to fix this sort of issue. or can i ignore this sort of error.  
Please find below my test simulation.

Test Simulation

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**Author:** ![Excilys](https://avatars.discourse-cdn.com/v4/letter/e/8797f3/32.png) [@Excilys](https://community.gatling.io/u/Excilys)\
**Post date:** [November 17, 2014, 2:40pm UTC](https://community.gatling.io/t/gatling-simulation-completed-however-seeing-asynchandleractor-pool-hasnt-been-started-error-frequently/1713/2 "2014-11-17T14:40:55Z")

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You’re at the limit of your SUT in terms of opening connections.