GNU bug report logs - #46942
ci.guix.gnu.org is slow from my system

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From: raid5atemyhomework <raid5atemyhomework <at> protonmail.com>
To: Maxime Devos <maximedevos <at> telenet.be>
Cc: "pengmeiyu <at> riseup.net" <pengmeiyu <at> riseup.net>, "46942 <at> debbugs.gnu.org" <46942 <at> debbugs.gnu.org>, zimoun <zimon.toutoune <at> gmail.com>
Subject: bug#46942: ci.guix.gnu.org is slow from my system
Date: Tue, 16 Mar 2021 12:38:05 +0000

Here's another error!

For *this* instance notice the very slow download speed; other downloads got up to 2MiB/s.  If my understanding is correct the SJTUG server is effectively a caching proxy, meaning that the low download speed here probably means that the SJTUG server itself is downloading from the Berlin Cuirass.  As noted before, often an issue with using ci.guix.gnu.org is that for large multi-megabyte substitutes sometimes the Berlin server will just disconnect and EOF early, so I suspect something similar is happening to the SJTUG server.

```
downloading from https://mirror.sjtu.edu.cn/guix/nar/lzip/6fa3h0n957hr2nbd05ygjnk4idjq122q-ffmpeg-4.3.2 ...
 ffmpeg-4.3.2  8.8MiB                                                                                                                                13KiB/s 05:05 [#######           ]  44.2%
Backtrace:
In guix/store/deduplication.scm:
    227:2 19 (dump-file/deduplicate "/gnu/store/6fa3h0n957hr2nbd05y…" …)
In ice-9/ports.scm:
   463:17 18 (call-with-output-file _ _ #:binary _ #:encoding _)
In guix/store/deduplication.scm:
   232:10 17 (_ _)
In guix/serialization.scm:
    261:6 16 (dump _)
   247:20 15 (dump #<input: string 7fb2d8c83cb0> #<output: string 7…> …)
In unknown file:
          14 (get-bytevector-n! #<input: string 7fb2d8c83cb0> # 0 #)
In guix/store/deduplication.scm:
   203:22 13 (read! #vu8(85 110 107 110 111 119 110 32 112 105 99 …) …)
In unknown file:
          12 (get-bytevector-n! #<input: string 7fb2d8ed4d90> # 0 #)
In gcrypt/hash.scm:
   223:13 11 (read! #vu8(85 110 107 110 111 119 110 32 112 105 99 …) …)
In unknown file:
          10 (get-bytevector-n! #<input: string 7fb2d8ed4e70> # 0 #)
In lzlib.scm:
    501:4  9 (lzread! #<lz-decoder 7fb2d8c6bbf0> #<input: string 7f…> …)
In unknown file:
           8 (get-bytevector-n #<input: string 7fb2d8ed4ee0> 65537)
In guix/progress.scm:
   358:30  7 (read! _ _ _)
In unknown file:
           6 (get-bytevector-n! #<input: string 7fb2d8c832a0> # 0 #)
In web/response.scm:
     95:2  5 (read! _ _ _)
In ice-9/boot-9.scm:
  1669:16  4 (raise-exception _ #:continuable? _)
  1669:16  3 (raise-exception _ #:continuable? _)
  1764:13  2 (_ #<&compound-exception components: (#<&error> #<&irri…>)
  1669:16  1 (raise-exception _ #:continuable? _)
  1669:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1669:16: In procedure raise-exception:
Throw to key `bad-response' with args `("EOF while reading response body: ~a bytes of ~a" (4112173 9196598))'.
Backtrace:
In ice-9/boot-9.scm:
  1736:10  4 (with-exception-handler _ _ #:unwind? _ # _)
In unknown file:
           3 (apply-smob/0 #<thunk 7fb2dec76520>)
In ice-9/boot-9.scm:
    718:2  2 (call-with-prompt _ _ #<procedure default-prompt-handle…>)
In ice-9/eval.scm:
    619:8  1 (_ #(#(#<directory (guile-user) 7fb2dec79c80>)))
In guix/ui.scm:
  2164:12  0 (run-guix-command _ . _)

guix/ui.scm:2164:12: In procedure run-guix-command:
Throw to key `bad-response' with args `("EOF while reading response body: ~a bytes of ~a" (4112173 9196598))'.
substitution of /gnu/store/6fa3h0n957hr2nbd05ygjnk4idjq122q-ffmpeg-4.3.2 failed
guix upgrade: error: some substitutes for the outputs of derivation `/gnu/store/9xx9kbbjals2y7llhak65fnnyfh9rkyq-gnome-tweaks-3.34.1.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source
```

Thanks
raid5atemyhomework

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