[pgpool-general: 8861] Re: Fwd: pgpool is not accepting connections

Zhaoxun Yan yan.zhaoxun at gmail.com
Mon Jul 3 17:55:50 JST 2023


Hi Peng!
As in the configuration:
backend_hostname0 = '172.17.0.2'
172.17.0.2 is primary by default, or does pgpool think otherwise? How can I
check?


On Mon, Jul 3, 2023 at 4:29 PM Bo Peng <pengbo at sraoss.co.jp> wrote:

> Hi,
>
> > I have tested local postgresql, and it is ok for psql works:
> > psql -h 127.0.0.1  -U checker -c '\l' template1
> > But as I add in `-p 9999` the pgpool is down:
> > psql -h 127.0.0.1 -p 9999 -U checker -c '\l' template1
> > And I have found the latest log with these lines repeating:
>
> You need to make sure PostgreSQL primary is running before pgpool starts.
> If pgpool can't find any running PostgreSQL primary within
> "search_primary_node_timeout",
> Pgpool believes all backend nodes are down and will not accepting any new
> connections.
>
> On Thu, 29 Jun 2023 15:04:17 +0800
> Zhaoxun Yan <yan.zhaoxun at gmail.com> wrote:
>
> > I have also tested connecting postgres directly via ip address registered
> > as first backend in pgpool.conf
> > backend_hostname0 = '172.17.0.2'
> >
> > And it works:
> > # psql -h 172.17.0.2 -p 5432 -U checker -c '\l' template1
> > Password for user checker:
> >                                   List of databases
> >    Name    |  Owner   | Encoding |   Collate   |    Ctype    |   Access
> > privileges
> >
> -----------+----------+----------+-------------+-------------+-----------------------
> >  postgres  | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
> >  template0 | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
> =c/postgres
> >          +
> >            |          |          |             |             |
> > postgres=CTc/postgres
> >  template1 | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
> =c/postgres
> >          +
> >            |          |          |             |             |
> > postgres=CTc/postgres+
> >            |          |          |             |             |
> > checker=CTc/postgres
> > (3 rows)
> >
> > while pgpool getsdozens of subprocess waiting for connection, it still
> > believes that all nodes are down:
> >
> > # ps aux|grep pgpool|grep -v grep
> > root      100949  0.0 17.5 149080 137180 ?       Ss   Jun28   0:00 pgpool
> > root      100950  0.0  0.3  15308  2932 ?        S    Jun28   0:00
> pgpool:
> > PgpoolLogger
> > root      100953  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100955  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100956  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100958  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100959  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100960  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100961  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100962  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100963  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100964  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100966  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100967  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100969  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100970  0.0  0.3 149080  2784 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100971  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100972  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100973  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100974  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100975  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100977  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100978  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100981  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100982  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      100983  0.0  0.3 149080  2788 ?        S    Jun28   0:00
> pgpool:
> > wait for connection request
> > root      101010  0.0  0.1 149084  1352 ?        S    Jun28   0:00
> pgpool:
> > PCP: wait for connection request
> > root      101011  0.0  0.1 149080  1352 ?        S    Jun28   0:00
> pgpool:
> > worker process
> >
> > ---------- Forwarded message ---------
> > From: Zhaoxun Yan <yan.zhaoxun at gmail.com>
> > Date: Wed, Jun 28, 2023 at 4:47 PM
> > Subject: pgpool is not accepting connections
> > To: <pgpool-general at pgpool.net>
> >
> >
> > Hi guys!
> >
> > I have tested local postgresql, and it is ok for psql works:
> > psql -h 127.0.0.1  -U checker -c '\l' template1
> > But as I add in `-p 9999` the pgpool is down:
> > psql -h 127.0.0.1 -p 9999 -U checker -c '\l' template1
> > And I have found the latest log with these lines repeating:
> >
> > 2023-06-28 16:36:22.928: child pid 100980: FATAL:  pgpool is not
> accepting
> > any new connections
> > 2023-06-28 16:36:22.928: child pid 100980: DETAIL:  all backend nodes are
> > down, pgpool requires at least one valid node
> > 2023-06-28 16:36:22.928: child pid 100980: HINT:  repair the backend
> nodes
> > and restart pgpool
> > 2023-06-28 16:36:22.928: main pid 100949: LOG:  reaper handler
> > 2023-06-28 16:36:22.929: main pid 100949: LOG:  child process with pid:
> > 100980 exited with success and will not be restarted
> > 2023-06-28 16:36:22.929: main pid 100949: LOG:  reaper handler: exiting
> > normally
> > 2023-06-28 16:36:28.899: child pid 100976: FATAL:  pgpool is not
> accepting
> > any new connections
> >
> > Attached is the current pgpool configuration.
>
>
> --
> Bo Peng <pengbo at sraoss.co.jp>
> SRA OSS LLC
> TEL: 03-5979-2701 FAX: 03-5979-2702
> URL: https://www.sraoss.co.jp/
>
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