# Infinispan errors upgrading from keycloak 11.x to 12.x

**URL:** <https://forum.keycloak.org/t/infinispan-errors-upgrading-from-keycloak-11-x-to-12-x/7034>\
**Category:** Configuring the server\
**Tags:** upgrading\
**Created:** [January 28, 2021, 1:40am UTC](https://forum.keycloak.org/t/infinispan-errors-upgrading-from-keycloak-11-x-to-12-x/7034 "2021-01-28T01:40:50Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![dasniko](https://yyz2.discourse-cdn.com/free1/user_avatar/forum.keycloak.org/dasniko/32/2969_2.png) [@dasniko](https://forum.keycloak.org/u/dasniko)\
**Post date:** [January 28, 2021, 7:51am UTC](https://forum.keycloak.org/t/infinispan-errors-upgrading-from-keycloak-11-x-to-12-x/7034/2 "2021-01-28T07:51:05Z")

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> [@11.0.3 to 12.0.1 Upgrade fails](http://forum.keycloak.org/t/11-0-3-to-12-0-1-upgrade-fails/6730/5):
>
> Keycloak doesn’t support rolling upgrades. So, if you want to wait, until this is fixed, this might become long… very long… Zero-downtime upgrade is on the map for Keycloak.X. But then, you only will be upgradeable from an X-based version to one of the next without downtime, not from 11.x to somewhat X…

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