git pull hangs

[Richard Kimberly Heck]

On 10/28/20 7:04 AM, Marco Morandini wrote:
>>> would it be possible to get a log from the server on your side?
>>> Or could you give a look?
>>> On our side we can make whatever test you may ask for.
>>
>> I'd be happy to try to help. What logs would be useful, do you think?
>
> Thank you!
>
> It would be great if you could have a look into
> git-daemon's log, and spot any issue and/or log regarding a connection
> coming from
> 131.175.154.248 . Even better, for any traffic with the whole
> 131.175.0.0/16 subnet .
>
> git-daemon should log by default, but we fear that where this log
> actually is (syslog?)
> may depend on your local configuration.
>
> A search into your firewall's dropped packet log for packets coming
> from 131.175.154.248
> (o, better, 131.175.0.0/16) could be useful as well.
>
> Should be of any help for extracting the right portion of the logs we
> have tried a git pull
> today at
> Wed Oct 28 10:24:51 AM CET 2020

I see two kinds of things, repeatedly. The first looks like:

Oct 27 16:23:48 lyx xinetd[1163]: START: git pid=9872
from=::ffff:131.175.154.246
Oct 27 16:23:48 lyx git-daemon[9872]: Connection from 131.175.154.246:59193
Oct 27 16:23:48 lyx git-daemon[9872]: protocol error: bad line length
character: git-
Oct 27 16:23:48 lyx xinetd[1163]: EXIT: git status=1 pid=9872
duration=0(sec)

For the specific address 131.175.154.248, I see:

Oct 26 10:18:02 lyx xinetd[1163]: FAIL: git per_source_limit
from=::ffff:131.175.154.248
Oct 26 10:18:32 lyx xinetd[25386]: Failed to contact identity server at
::ffff:131.175.154.248: timeout

though there are some older successes.

Presumably, this is the problem. There look to be a number of open
connections from your IP:

# ss | grep 131.175.154.248
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:infomover
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:anoto-rendezv
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:12533  
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:21795  
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:23615  
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:17338  
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:43233  
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:61968  
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:63361  
ESTAB      0      0            140.211.9.84:git       
131.175.154.248:37425  

I have killed all those stale connections. Hopefully that will help. (I
will guess that the working IP for some reason had an open connection.)

Riki