# What is the mechanism in-place, that make sure OneAgent won't throw HTTP 5xx error, and also wouldn't be gap in monitoring data during Managed Cluster Upgrade?

**URL:** <https://community.dynatrace.com/t/what-is-the-mechanism-in-place-that-make-sure-oneagent-wont-throw-http-5xx-error-and-also-wouldnt-be-gap-in-monitoring-data-during-managed-cluster-upgrade/19607>\
**Category:** Open Q&A\
**Tags:** activegate\
**Created:** [February 18, 2019, 3:21am UTC](https://community.dynatrace.com/t/what-is-the-mechanism-in-place-that-make-sure-oneagent-wont-throw-http-5xx-error-and-also-wouldnt-be-gap-in-monitoring-data-during-managed-cluster-upgrade/19607 "2019-02-18T03:21:56Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![waikeat\_chan](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/waikeat_chan/32/33405_2.png) [@waikeat\_chan](https://community.dynatrace.com/u/waikeat_chan)\
**Post date:** [February 18, 2019, 3:21am UTC](https://community.dynatrace.com/t/what-is-the-mechanism-in-place-that-make-sure-oneagent-wont-throw-http-5xx-error-and-also-wouldnt-be-gap-in-monitoring-data-during-managed-cluster-upgrade/19607/1 "2019-02-18T03:21:56Z")

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Is it like the Active Gate would cache the data temporarily from OneAgent, and then flush to Managed Server after the Upgrade complete?

Or is there any other mechanism?

Best Regards,

Wai Keat

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**Author:** ![skrystosik](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/skrystosik/32/21133_2.png) [@skrystosik](https://community.dynatrace.com/u/skrystosik)\
**Post date:** [February 18, 2019, 6:24am UTC](https://community.dynatrace.com/t/what-is-the-mechanism-in-place-that-make-sure-oneagent-wont-throw-http-5xx-error-and-also-wouldnt-be-gap-in-monitoring-data-during-managed-cluster-upgrade/19607/2 "2019-02-18T06:24:13Z")

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Agent itself has some cache for data, cluster update doeasn’t take long. I’ve never seen any gap because of this process.

Sebastian

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**Author:** ![Joe\_Hoffman](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/joe_hoffman/32/30752_2.png) [@Joe\_Hoffman](https://community.dynatrace.com/u/Joe_Hoffman)\
**Post date:** [February 19, 2019, 8:52pm UTC](https://community.dynatrace.com/t/what-is-the-mechanism-in-place-that-make-sure-oneagent-wont-throw-http-5xx-error-and-also-wouldnt-be-gap-in-monitoring-data-during-managed-cluster-upgrade/19607/3 "2019-02-19T20:52:59Z")

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There’s multiple parts to OneAgent. One part is responsible for collecting data. Another part is responsible for communicating the data to the cluster. Therefore in the event of cluster communication issues, there’s no chance of the monitored application being affected.