chore: switch agent gone response from 502 to 404 (backport #23090)#23636
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f0ssel merged 1 commit intorelease/2.30from Mar 25, 2026
Merged
chore: switch agent gone response from 502 to 404 (backport #23090)#23636f0ssel merged 1 commit intorelease/2.30from
f0ssel merged 1 commit intorelease/2.30from
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When a user creates a workspace, opens the web terminal, then the workspace stops but the web terminal remains open the web terminal will retry the connection. Coder will issue a HTTP 502 Bad Gateway response when this occurs because coderd cannot connect to the workspace agent, however this is problematic as any load balancer sitting in front of Coder sees a 502 and thinks Coder is unhealthy. The main change is in https://github.com/coder/coder/pull/23090/changes#diff-bbe3b56ed3532289481a0e977867cd15048b7ca718ce676aae3f3332378eebc2R97, however the main test and downstream tests are also updated. This PR changes the response to a [HTTP 404](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Status/404) after internal discussion. <img width="1832" height="1511" alt="image" src="https://github.com/user-attachments/assets/0baff80d-bb98-4644-89cd-e80c87947098" /> Created with the help of Mux, reviewed and tested by a human
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Documentation CheckNo Changes NeededThis PR changes the HTTP response status code from 502 to 404 when a workspace app is unavailable (agent offline). The change is an internal bug fix to prevent load balancers from misinterpreting Coder as unhealthy. No user-facing documentation, CLI flags, configuration options, or API contracts are affected. No existing docs reference this specific status code behavior. Automated review via Coder Tasks |
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f0ssel
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Mar 25, 2026
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Backport of #23090 to
release/2.30.When a user creates a workspace, opens the web terminal, then the workspace stops but the web terminal remains open, the web terminal will retry the connection. Coder would issue a HTTP 502 Bad Gateway response when this occurred because coderd could not connect to the workspace agent, however this is problematic as any load balancer sitting in front of Coder sees a 502 and thinks Coder is unhealthy.
This PR changes the response to a HTTP 404 after internal discussion.
Cherry-picked from merge commit c33812a.