Message-ID: <ed56081d-ab7c-4dd2-a795-495ef4c15ffd@dunslane.net>
Date: Sat, 19 Apr 2025 07:47:26 -0400
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Subject: Re: disabled SSL log_like tests
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>,
 Jacob Champion <jacob.champion@enterprisedb.com>
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From: Andrew Dunstan <andrew@dunslane.net>
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On 2025-04-18 Fr 7:26 PM, Tom Lane wrote:
> I wrote:
>> What I think happened here is that a previous backend hadn't exited
>> yet when we start the test, and when its report does come out,
>> connect_fails prematurely stops waiting.  (In the above, evidently
>> the child process we want to wait for is 599, but we're fooled by
>> a delayed report for 25401.)  So my v1 patch needs work.
>> Maybe we can make the test compare the PIDs in the "forked new client
>> backend" and "client backend exited" log messages.  Stay tuned...
> Okay, this version seems more reliable.
>

+See C<log_check(...)>.  CAUTION: use of either option requires that
+the server's log_min_messages be at least DEBUG2, and that no other
+client backend is launched concurrently.  These requirements allow
+C<connect_fails> to wait to see the postmaster-log report of backend
+exit, without which there is a race condition as to whether we will
+see the expected backend log output.


That seems a little fragile. I can imagine test authors easily 
forgetting this. Is it worth sanity checking to make sure 
log_min_messages is appropriately set?


cheers


andrew


>
--
Andrew Dunstan
EDB: https://www.enterprisedb.com