Bug 41853 - OAuth2 Failed to warm up, name or service not known
Summary: OAuth2 Failed to warm up, name or service not known
Status: NEW
Alias: None
Product: Koha
Classification: Unclassified
Component: Authentication (show other bugs)
Version: unspecified
Hardware: All All
: P5 - low trivial
Assignee: Bugs List
QA Contact: Testopia
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Reported: 2026-02-16 10:29 UTC by Lari Taskula
Modified: 2026-02-16 10:29 UTC (History)
1 user (show)

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Description Lari Taskula 2026-02-16 10:29:55 UTC
Every now and then we find the following error in plack-api-error.log

[ERROR] [OAuth2] Failed to warm up https://mpass-proxy.csc.fi/.well-known/openid-configuration: Can't connect: Name or service not known

It does not seem to be related to a request to /api/v1/ as we cannot find any requests from around that timestamp.

At this point I don't know what exactly executes the warming up process and why the DNS resolution fails when otherwise OIDC authentication works just fine. Is it related to Koha, our Koha server, the DNS server we are using or the OIDC target server?

Anyway in case someone else is experiencing the same issue, I thought it'd be useful to create a Bug for this.