Environment
SiYuan 3.8.1, Windows desktop, official SiYuan cloud, paid subscription (Warrior).
All times below are UTC+2.
Symptom
Since 2026-08-27 08:14 the kernel can no longer reach the version endpoint:
E 2026/08/27 08:14:23 rhy.go:81: get version info failed: Get "https://siyuan-cloud.liuyun.io/apis/siyuan/version?ver=3.8.1": unexpected EOF
E 2026/08/27 08:14:23 updater.go:211: get announcement failed: Get "https://siyuan-cloud.liuyun.io/apis/siyuan/version?ver=3.8.1": unexpected EOF
13 failures between 08:14 and 14:39 that day, no success in between.
Direct probes
Requesting the same URL outside SiYuan returns HTTP 522 (Cloudflare: connection
timed out to origin), then plain timeouts on retry. Nine attempts spread over the
day, zero responses, last checked at 15:15.
Other routes on the same host answer normally at the same moment:
| Request | Result |
|---|---|
| GET / | 200 |
| POST /apis/siyuan/user | 200, {"msg":"Bad request","code":-1} |
| POST /apis/siyuan/login | 200, {"msg":"Wrong password","code":-1,...} |
| GET /apis/siyuan/version?ver=3.8.1 | 522, then timeout |
The origin behind Cloudflare is therefore up. Only this one route hangs.
Ruled out on the client side
- DNS resolves and TCP 443 opens normally
- TLS certificate is authentic (CN=liuyun.io, Google Trust Services), so no
interception by antivirus or firewall - no system proxy configured
- reproduced from a second, independent network in another country with the
same result
Impact
Update checks and announcements are unavailable, and the kernel log fills with
the errors above. Data sync itself is not affected.
Question
Is this a known issue on the service side, or is there something left to check
locally?
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