# What mean for these process async properties (help!)

**URL:** <https://forum.flowable.org/t/what-mean-for-these-process-async-properties-help/3094>\
**Category:** Flowable Engine\
**Created:** [December 19, 2018, 7:40am UTC](https://forum.flowable.org/t/what-mean-for-these-process-async-properties-help/3094 "2018-12-19T07:40:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![asterisk](https://avatars.discourse-cdn.com/v4/letter/a/6a8cbe/32.png) [@asterisk](https://forum.flowable.org/u/asterisk)\
**Post date:** [December 19, 2018, 7:40am UTC](https://forum.flowable.org/t/what-mean-for-these-process-async-properties-help/3094/1 "2018-12-19T07:40:14Z")

</div>

Hi,

1. In this url: [https://www.flowable.org/docs/userguide/index.html#springBootFlowableProperties](https://www.flowable.org/docs/userguide/index.html#springBootFlowableProperties)  
I saw something like this. what mean for these properties?

```auto
flowable.process.async.executor.max-async-jobs-due-per-acquisition=1 # ???
flowable.process.async.executor.retry-wait-time-in-millis=500 # ???

```

1. In my process, I have some ServiceTasks which will run long time, and I set my ServiceTask with triggerable and async properties. I use message to trigger the process.  
Now, I don’t known whether async thread will do retry during ServiceTask is executing. How to control async thread retry?

thanks.