# Cluster upgrade **URL:** \ **Category:** Beats\ **Tags:** filebeat\ **Created:** [April 10, 2019, 2:42pm UTC](https://discuss.elastic.co/t/cluster-upgrade/176244 "2019-04-10T14:42:48Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Alessio\_Creo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alessio_creo/32/43381_2.png) [@Alessio\_Creo](https://discuss.elastic.co/u/Alessio_Creo)\ **Post date:** [April 10, 2019, 2:42pm UTC](https://discuss.elastic.co/t/cluster-upgrade/176244/1 "2019-04-10T14:42:48Z")
Hi there, I'm receiving data shipped by Filebeat from 59 hosts. Now I have to proceed a full cluster restart to change the SSL certificate while upgrading to the last version. Is it recommended to stop the agents while I'm doing those operation? ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [April 11, 2019, 10:34am UTC](https://discuss.elastic.co/t/cluster-upgrade/176244/2 "2019-04-11T10:34:23Z")
It should cope with a cluster restart, it'll just hold data till it can reconnect. ---
**Author:** ![Alessio\_Creo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alessio_creo/32/43381_2.png) [@Alessio\_Creo](https://discuss.elastic.co/u/Alessio_Creo)\ **Post date:** [April 11, 2019, 2:32pm UTC](https://discuss.elastic.co/t/cluster-upgrade/176244/3 "2019-04-11T14:32:50Z")
Okay. Thank you very much for the answer and for the help. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 9, 2019, 2:33pm UTC](https://discuss.elastic.co/t/cluster-upgrade/176244/4 "2019-05-09T14:33:05Z")
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