# True parallel service task

**URL:** <https://forum.flowable.org/t/true-parallel-service-task/9969>\
**Category:** Flowable Engine\
**Created:** [December 7, 2022, 6:15am UTC](https://forum.flowable.org/t/true-parallel-service-task/9969 "2022-12-07T06:15:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![abhinavmanthri](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/abhinavmanthri/32/3021_2.png) [@abhinavmanthri](https://forum.flowable.org/u/abhinavmanthri)\
**Post date:** [December 7, 2022, 6:15am UTC](https://forum.flowable.org/t/true-parallel-service-task/9969/1 "2022-12-07T06:15:39Z")

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How does using `FutureJavaDelegates` resolve optimistic locks here?

refer this doc[[True Parallel Service Task Execution with Flowable](https://www.flowable.com/blog/true-parallel-service-task-execution-with-flowable)]

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**Author:** ![filiphr](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/filiphr/32/315_2.png) [@filiphr](https://forum.flowable.org/u/filiphr)\
**Post date:** [February 24, 2023, 9:12am UTC](https://forum.flowable.org/t/true-parallel-service-task/9969/2 "2023-02-24T09:12:21Z")

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Hey @abhinavmanthri,

I am not sure that I understand your question. When using the true parallel service task there are no optimistic locks as everything happens in the same transaction. It is parallel because things are executed on multiple threads.

Cheers,  
Filip