502 errors after upgrading to pangolin 1.7.x #1214

New Issue

MrUnknownDE · 2026-04-05T18:31:50+02:00

MrUnknownDE commented

2026-04-05 18:31:50 +02:00

Originally created by @L0sWach0s on 7/18/2025

Hello everyone!
I upgraded my Pangolin instance to 1.7.x today. The 1.6.2 was working cleanly so far.

Unfortunately, since the update to 1.7.x (regardless of which version, I've tried them all), I'm constantly getting a 502 error from Cloudflare (proxy is active) on my sites. This also means I can no longer use my Authentik instance.
A downgrade (thanks to backup) to 1.6.2 without changing my settings solved the problem.

snip of the log:
{"level":"debug","time":"2025-07-18T19:08:55+02:00","caller":"github.com/traefik/traefik/v3/pkg/server/service/loadbalancer/wrr/wrr.go:175","message":"Service selected by WRR: https://100.89.128.4:53393"}/ {"plugin":"plugin-badger","module":"github.com/fosrl/badger","runtime":"","time":"2025-07-18T19:08:55+02:00","caller":"fmt/print.go:305","level":"debug","message":"Badger: Valid session"} {"level":"debug","time":"2025-07-18T19:08:55+02:00","caller":"github.com/traefik/traefik/v3/pkg/server/service/loadbalancer/wrr/wrr.go:175","message":"Service selected by WRR: https://100.89.128.4:53393"}/ {"plugin":"plugin-badger","module":"github.com/fosrl/badger","runtime":"","time":"2025-07-18T19:08:56+02:00","caller":"fmt/print.go:305","level":"debug","message":"Badger: Valid session"} {"level":"debug","time":"2025-07-18T19:08:56+02:00","caller":"github.com/traefik/traefik/v3/pkg/server/service/loadbalancer/wrr/wrr.go:175","message":"Service selected by WRR: https://100.89.128.4:53393"}/ {"plugin":"plugin-badger","module":"github.com/fosrl/badger","runtime":"","time":"2025-07-18T19:09:02+02:00","caller":"fmt/print.go:305","level":"debug","message":"Badger: Valid session"} {"level":"debug","time":"2025-07-18T19:09:02+02:00","caller":"github.com/traefik/traefik/v3/pkg/server/service/loadbalancer/wrr/wrr.go:175","message":"Service selected by WRR: https://100.89.128.4:53393"}/ {"level":"debug","error":"read tcp 100.89.128.1:38618->100.89.128.4:53393: read: connection reset by peer","time":"2025-07-18T19:09:02+02:00","caller":"github.com/traefik/traefik/v3/pkg/proxy/httputil/proxy.go:121","message":"502 Bad Gateway"}

*Originally created by @L0sWach0s on 7/18/2025* Hello everyone! I upgraded my Pangolin instance to 1.7.x today. The 1.6.2 was working cleanly so far. Unfortunately, since the update to 1.7.x (regardless of which version, I've tried them all), I'm constantly getting a 502 error from Cloudflare (proxy is active) on my sites. This also means I can no longer use my Authentik instance. A downgrade (thanks to backup) to 1.6.2 without changing my settings solved the problem. snip of the log: `{"level":"debug","time":"2025-07-18T19:08:55+02:00","caller":"github.com/traefik/traefik/v3/pkg/server/service/loadbalancer/wrr/wrr.go:175","message":"Service selected by WRR: https://100.89.128.4:53393"}/ {"plugin":"plugin-badger","module":"github.com/fosrl/badger","runtime":"","time":"2025-07-18T19:08:55+02:00","caller":"fmt/print.go:305","level":"debug","message":"Badger: Valid session"} {"level":"debug","time":"2025-07-18T19:08:55+02:00","caller":"github.com/traefik/traefik/v3/pkg/server/service/loadbalancer/wrr/wrr.go:175","message":"Service selected by WRR: https://100.89.128.4:53393"}/ {"plugin":"plugin-badger","module":"github.com/fosrl/badger","runtime":"","time":"2025-07-18T19:08:56+02:00","caller":"fmt/print.go:305","level":"debug","message":"Badger: Valid session"} {"level":"debug","time":"2025-07-18T19:08:56+02:00","caller":"github.com/traefik/traefik/v3/pkg/server/service/loadbalancer/wrr/wrr.go:175","message":"Service selected by WRR: https://100.89.128.4:53393"}/ {"plugin":"plugin-badger","module":"github.com/fosrl/badger","runtime":"","time":"2025-07-18T19:09:02+02:00","caller":"fmt/print.go:305","level":"debug","message":"Badger: Valid session"} {"level":"debug","time":"2025-07-18T19:09:02+02:00","caller":"github.com/traefik/traefik/v3/pkg/server/service/loadbalancer/wrr/wrr.go:175","message":"Service selected by WRR: https://100.89.128.4:53393"}/ {"level":"debug","error":"read tcp 100.89.128.1:38618->100.89.128.4:53393: read: connection reset by peer","time":"2025-07-18T19:09:02+02:00","caller":"github.com/traefik/traefik/v3/pkg/proxy/httputil/proxy.go:121","message":"502 Bad Gateway"}`

MrUnknownDE closed this issue

2026-04-05 18:31:50 +02:00

MrUnknownDE added the bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug labels 2026-04-05 18:31:54 +02:00

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Reference: github/pangolin#1214