Re: BUG #16353: pg_isready timeout is ignored

From: Hamid Akhtar <hamid(dot)akhtar(at)gmail(dot)com>
To: vonproteus+postgresql(dot)org(at)gmail(dot)com, pgsql-bugs(at)lists(dot)postgresql(dot)org
Subject: Re: BUG #16353: pg_isready timeout is ignored
Date: 2020-04-09 07:45:26
Message-ID: CANugjht_dCJPpqFbDHVYcncgw=tm_p8ka_=0+QWJt08gb+GnLg@mail.gmail.com
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For pg_isready attempts to make a connection with the sever. If a
connection is not successful and we didn't receive any error response from
the server, it is a fair assumption to make that server is not running. In
this case, it makes perfect sense to not honour the timeout value and
return immediately.

So, this is actually not a bug but rather an expected behaviour.

On Thu, Apr 9, 2020 at 11:18 AM PG Bug reporting form <
noreply(at)postgresql(dot)org> wrote:

> The following bug has been logged on the website:
>
> Bug reference: 16353
> Logged by: vonProteus
> Email address: vonproteus+postgresql(dot)org(at)gmail(dot)com
> PostgreSQL version: 11.7
> Operating system: docker postgres:11-alpine (x64)
> Description:
>
> hi
> i have problem with pg_isready and time out
> it look like it is ignored
> this is my setup
>
> $ docker run --name some-postgres -e POSTGRES_PASSWORD=mysecretpassword -p
> 3333:5432 --rm -d postgres:11-alpine
> 4765f8dc49374044d551b3cdb0ce5284905ee1c01bf6a81b2cddf30ab6798bc8
>
> $ time docker run --rm postgres:11-alpine pg_isready -t 120 -h
> 10.110.12.163 -p 3333
> 10.110.12.163:3333 - accepting connections
>
> real 0m0.781s
> user 0m0.000s
> sys 0m0.031s
>
> $ docker stop some-postgres
> some-postgres
>
> $ time docker run --rm postgres:11-alpine pg_isready -t 120 -h
> 10.110.12.163 -p 3333
> 10.110.12.163:3333 - no response
>
> real 0m2.722s
> user 0m0.000s
> sys 0m0.031s
>
> i would expect that second call would exit after 120s
> i run this on windows
>
>

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