[Piuparts-devel] Bug#1105847: piuparts: flaky tests on riscv64

[Bo YU]

Source: piuparts
Version: 1.6.0
Severity: important
User: debian-ci at lists.debian.org
Usertags: flaky
X-Debbugs-Cc: elbrus at debian.org 

Dear Maintainer,

piuparts's tests fail very often (but not always) on riscv64:
https://ci.debian.net/packages/p/piuparts/unstable/riscv64/

and always fail on loong64:
https://ci.debian.net/packages/p/piuparts/unstable/loong64/

But unfortunately, I haven't found the root cause of theis problem until
now.


From these logs, these test cases failed like:

```
781s   Get:1 http://mirrors.tuna.tsinghua.edu.cn/debian sid InRelease [208 kB]
781s   Err:1 http://mirrors.tuna.tsinghua.edu.cn/debian sid InRelease
781s     Sub-process /usr/bin/sqv returned an error code (1), error message is: Verifying signature:            Message has been manipulated Verifying signature:            Message has been manipulated
781s   Reading package lists...
781s   W: OpenPGP signature verification failed: http://mirrors.tuna.tsinghua.edu.cn/debian sid InRelease: Sub-process /usr/bin/sqv returned an error code (1), error message is: Verifying signature:            Message has been manipulated Verifying signature:            Message has been manipulated
781s   E: The repository 'http://mirrors.tuna.tsinghua.edu.cn/debian sid InRelease' is not signed.
781s 2m8.7s ERROR: Command failed (status=100): ['chroot', '/tmp/tmpmxrgp2jc', 'eatmydata', 'apt-get', 'update']
781s   Get:1 http://mirrors.tuna.tsinghua.edu.cn/debian sid InRelease [208 kB]
781s   Err:1 http://mirrors.tuna.tsinghua.edu.cn/debian sid InRelease
781s     Sub-process /usr/bin/sqv returned an error code (1), error message is: Verifying signature:            Message has been manipulated Verifying signature:            Message has been manipulated
781s   Reading package lists...
781s   W: OpenPGP signature verification failed: http://mirrors.tuna.tsinghua.edu.cn/debian sid InRelease: Sub-process /usr/bin/sqv returned an error code (1), error message is: Verifying signature:            Message has been manipulated Verifying signature:            Message has been manipulated
781s   E: The repository 'http://mirrors.tuna.tsinghua.edu.cn/debian sid InRelease' is not signed.
```
https://ci.debian.net/packages/p/piuparts/unstable/riscv64/60668778/#L1180

But this is impossible, we rely heavily on this mirror every day. But on
these logs failed, we can find the warnings on riscv64:

```
17s auto-apt-proxy: INFO: looking for available APT cache
 18s auto-apt-proxy: INFO: no proxy detected
 18s auto-apt-proxy: INFO: using cache: no proxy detected (ttl = 59s)
 18s Get:1 http://mirrors.tuna.tsinghua.edu.cn/debian unstable InRelease [205 kB]
 19s auto-apt-proxy: INFO: using cache: no proxy detected (ttl = 58s)
 19s Get:2 http://mirrors.tuna.tsinghua.edu.cn/debian unstable/main Sources.diff/Index [63.6 kB]
 19s auto-apt-proxy: INFO: using cache: no proxy detected (ttl = 58s)
 21s Get:3 http://deb.debian.org/debian-debug unstable-debug InRelease [56.7 kB]
 21s Get:4 http://mirrors.tuna.tsinghua.edu.cn/debian unstable/main riscv64 Packages.diff/Index [63.6 kB]
 21s auto-apt-proxy: INFO: using cache: no proxy detected (ttl = 56s)
 23s auto-apt-proxy: INFO: using cache: no proxy detected (ttl = 54s)
```

So I suspect the failure has something to do with this. Another proof is
that I can pass the autopkgtest on my local risv64 hardware(Unmatched)
without apt-proxy. I just put my thoughts on here and I will debug it
when I have enough time.

-- 
Regards,
--
  Bo YU

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