I came here hoping to find a step by step diagnostic for when a Discourse site is found in a 502 Bad Gateway condition. It seems the only options are along these lines: Discourse update might have failed, use ./launcher rebuild app. Update and reboot server. These are the kind of responses we get…

[画像] Tony G: With that info we might learn how to prevent the issue in the future. From reading a lot of posts here, typically forum admins aren’t the cause of 502s, and it’s a plugin/core error. So there wouldn’t be particularly much you could do to avoid those issues. [画像] Tony G: What…

I can open the console on this VPS but the text window is limited. Are there specific logs that can be checked in the container or in the OS? Is there already some form of ping process in the host OS or the container that detects when processes are down? Might a simple server restart within the c…

[画像] Tony G: I can open the console on this VPS but the text window is limited. I meant browser logs, from dev tools or the equivalent on your browser. [画像] Tony G: Might a simple server restart within the container be a good way to approach this rather than a full rebuild? I don’t be…

Is the disk full? Does this happen frequently? Look at /var/discourse/logs/rails/production.log

Sorry it’s taken so long to get back here… Disk is <50% in use. RAM tends to remain in 80-90 range, Swap <40%. I’m guessing this is where the issue is caused. Logs are in /var/discourse/shared/standalone/log/rails. production.log and related gzipped files have a lot of transaction detail. What m…

[画像] Firepup Sixfifty: I meant browser logs, from dev tools or the equivalent on your browser. This won’t help. The back end is the issue here. It’s not getting as far as getting a response from the server (hence “bad gateway”) it’s the backend rails logs you need to look at. Try the acti…

502 happens when rails doesn’t return a response, usually when the system is booting up or something is misconfigured. You might look in the nginx logs

[画像] Tony G: “Frequently”? No. But often enough to be mildly annoying and prompt a post here. :slight_smile: I think almost all of the threads here about 502 errors are when Discourse has been upgraded and it hasn’t come back to life. The upgrade failed, or the admin didn’t wait long enough f…

Discourseサイトで502 Bad Gatewayが見つかった場合の段階的な診断はありますか？

製品サポートインストール

pfaffman (Jay Pfaffman) 2024 年 1 月 24 日午前 12:37 5

ディスクは満杯ですか？

これは頻繁に起こりますか？

/var/discourse/logs/rails/production.log を確認してください。

トピック		返信	表示
How to track down failure of discourse upstream inside container resulting in 502 Bad Gateway Self-hosting	7	1300	2023 年 4 月 23 日
502 Bad Gateway after updating to latest version Product Support	11	469	2025 年 4 月 29 日
Brand new install, shows only "502 Bad Gateway" Product Support	2	142	2025 年 3 月 17 日
502 Bad Gateway after Update Product Support	3	957	2018 年 12 月 22 日
502 Bad Gateway - Newbie help needed Self-hosting	4	631	2018 年 11 月 15 日

Discourseサイトで502 Bad Gatewayが見つかった場合の段階的な診断はありますか？

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