Hello Andrew,

05.06.2024 21:10, Andrew Dunstan wrote:

I think I see what's going on here. It looks like it's because we start the server in unix socket mode, and then switch to using TCP as well.

Can you try your test with this patch applied and see if the problem persists? If we start in TCP mode the framework should test for a port clash.


It seems that the failure rate decreased (I guess the patch rules out the
case with two servers choosing the same port), but I still got:

16/53 postgresql:ssl / ssl/001_ssltests_36         OK 15.25s   205 subtests 
passed
17/53 postgresql:ssl / ssl/001_ssltests_30         ERROR 3.17s   (exit status 
255 or signal 127 SIGinvalid)

2024-06-05 19:40:37.395 UTC [414110] LOG:  starting PostgreSQL 17beta1 on 
x86_64-linux, compiled by gcc-13.2.1, 64-bit
2024-06-05 19:40:37.395 UTC [414110] LOG:  could not bind IPv4 address 
"127.0.0.1": Address already in use
2024-06-05 19:40:37.395 UTC [414110] HINT:  Is another postmaster already running on port 50072? If not, wait a few seconds and retry.

`grep '\b50072\b' -r testrun/` yields:
testrun/ssl/001_ssltests_34/log/001_ssltests_34_primary.log:2024-06-05 19:40:37.392 UTC [414111] [unknown] LOG:  connection received: host=localhost port=50072
(a psql case)

That is, psql from the test instance 001_ssltests_34 opened a connection to
the test server with the client port 50072 and it made using the port by
the server from the test instance 001_ssltests_30 impossible.

Best regards.
Alexander


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