Unexpected Error: "GraphQL error: Cannot query field "processes"...

[adammcdonagh]

Expected Behaviour

When browsing to view an entity, the entity should be displayed. Updated agents should be listed

Current Behaviour

Error message containing the following:

Error: GraphQL error: Cannot query field "processes" on type "System".
GraphQL error: Cannot query field "ARMVersion" on type "System".
GraphQL error: Cannot query field "libCType" on type "System".
GraphQL error: Cannot query field "VMSystem" on type "System".
GraphQL error: Cannot query field "VMRole" on type "System".
GraphQL error: Cannot query field "cloudProvider" on type "System".
GraphQL error: Unknown type "Process".

Also, any agents that have been upgraded to 6.2.7 disappear from the entity list. They still appear when you use the API, the have the same namespace as before etc, but just don't show in the web interface.

Steps to Reproduce (for bugs)

1. Log into web
2. Navigate to entities page
3. Click on an entity

Also

1. Upgrade an agent that currently shows in the entity list (e.g just run yum update sensu-go-agent). In my test its an agent on 5.19
2. Restart agent
3. Check entity list and see that entity no longer displays. If you try to navigate directly to it via the original URL, you just get a 404 error

Context

Unable to view entities in any way.

Browser Stack Trace:

at `new t` (/static/js/vendors~app_ac7d.js:2)
at `undefined` (/static/js/vendors~app_ac7d.js:2)
at `undefined` (/static/js/vendors~app_ac7d.js:2)
at `undefined` (/static/js/vendors~app_ac7d.js:2)
at `t.broadcastQueries` (/static/js/vendors~app_ac7d.js:2)
at `undefined` (/static/js/vendors~app_ac7d.js:2)
at `Object.next` (/static/js/vendors~app_ac7d.js:2)
at `h` (/static/js/vendors~app_ac7d.js:2)
at `v` (/static/js/vendors~app_ac7d.js:2)
at `e.value` (/static/js/vendors~app_ac7d.js:2)
at `undefined` (/static/js/vendors~app_ac7d.js:2)
at `f` (/static/js/vendors~app_ac7d.js:2)
at `T._settlePromiseFromHandler` (/static/js/vendors~app_ac7d.js:2)
at `T._settlePromise` (/static/js/vendors~app_ac7d.js:2)

Your Environment

• Sensu version used (sensuctl, sensu-backend, and/or sensu-agent): v 6.2.7 agent and backend sensu/web revision: 5cf0595
• Installation method (packages, binaries, docker etc.): Built from source using instructions in INSTALL.md file
• Operating System and version (e.g. Ubuntu 14.04): RHEL 7.9, running nodejs v14.16.0

[adammcdonagh]

Turns out one of the servers in the cluster wasn't upgraded and was causing the issues.. After upgrading that too everything works fine