Re: pgpool with PostgreSQL 7.4 - Mailing list pgsql-general

What are client_encoding values on these two servers? It seems they do
not match...
--
Tatsuo Ishii

> Sure, here is the debug output when I run the following command..
>
> -bash-2.05b$ psql -p 9999 -c 'show pool_status' template1
> psql: server closed the connection unexpectedly
>         This probably means the server terminated abnormally
>         before or while processing the request.
>
> Debug output from pgpool:
>
> 2005-04-14 10:23:55 DEBUG: pid 5557: I am 5557 accept fd 6
> 2005-04-14 10:23:55 DEBUG: pid 5557: Protocol Major: 3 Minor: 0 database: template1 user: postgres
> 2005-04-14 10:23:55 DEBUG: pid 5557: connecting postmaster Unix domain socket: /tmp/.s.PGSQL.5432
> 2005-04-14 10:23:55 DEBUG: pid 5557: connected to postmaster Unix domain socket: /tmp/.s.PGSQL.5432 fd: 7
> 2005-04-14 10:23:55 DEBUG: pid 5557: read_message_length: lenghth: 8
> 2005-04-14 10:23:55 DEBUG: pid 5557: read_message_length: lenghth: 30
> 2005-04-14 10:23:55 ERROR: pid 5557: read_message_length: length does not match between backends master(30)
secondary(27)
>
> --
> Kevin
>
> Tatsuo Ishii <t-ishii@sra.co.jp> wrote:
> Can you show me debug messages by starting pgpool with -d option?
> --
> Tatsuo Ishii
>
> > Hello,
> >
> > I'm having trouble getting pgpool to work in master/slave mode. I'm planning on using something like Slony-I for
replication,and use pgpool only to load balance the queries across the master and slave, as well as provide failover if
themaster goes down. 
> >
> > I configured the settings so replication_mode = false, load_balance_mode = true, and master_slave_mode = true. I
alsoset secondary_backend_host_name and secondary_backend_port to refer to the slave. Here's what happens when I try to
connectto the database to show the status: 
> >
> > -bash-2.05b$ psql -p 9999 -c 'show pool_status' template1
> > psql: server closed the connection unexpectedly
> > This probably means the server terminated abnormally
> > before or while processing the request.
> > The strange thing is that if I change the configuration so master_slave_mode = false, it seems that the failover
worksbut load balancing does not. When master/slave is disabled, I'm able to show the status and run queries against
themaster. If I use "pgpool -s s switch" to perform a manual switchover, I am then able to run queries against the
slave.But as soon as I try running pgpool with master_slave_mode = true, it stops working and when I try to connect I
getthe error above ("server closed the connection unexpectedly"). 
> >
> > Am I doing something wrong? Below are my configuration settings when I receive the error. I'm using the latest
stablebuild of pgpool (2.5.1). The master is PG 7.4.7, the slave is PG 7.4. 
> >
> > [root@vl-pe6650-004 etc]# more pgpool.conf
> > #
> > # pgpool configuration file sample
> > # $Header: /cvsroot/pgpool/pgpool/pgpool.conf.sample,v 1.1.1.1 2005/02/14 14:52:21 t-ishii Exp $
> > # host name or IP address to listen on: '*' for all, '' for no TCP/IP connections
> > listen_addresses = '*'
> > # port number for pgpool
> > port = 9999
> > # Unix domain socket path. Debian package default to /var/run/postgresql!
> > socket_dir = '/tmp'
> > # host name where PostgreSQL server is running on. '' means localhost using UNIX
> > # domain socket
> > backend_host_name = ''
> > # port number PostgreSQL server is running on.
> > backend_port = 5432
> > # Unix domain socket path for the backend. Debian package default to /var/run/postgresql!
> > backend_socket_dir = '/tmp'
> > # host name where secondary PostgreSQL server is running on. '' means localhost using UNIX
> > # domain socket
> > secondary_backend_host_name = '192.168.0.153'
> > # port number secondary PostgreSQL server is running on.
> > # 0 means no secondrary PostgreSQL
> > secondary_backend_port = 5432
> > # number of pre-forked child process
> > num_init_children = 32
> > # numer of connection pool allowed for a child process.
> > max_pool = 4
> > # if idle for this seconds, child exits. 0 means no timeout.
> > child_life_time = 300
> > # if idle for this seconds, connection to PostgreSQL closes. 0 means
> > # no timeout
> > connection_life_time = 0
> > # logging directory
> > logdir = '/tmp'
> > # replication mode
> > replication_mode = false
> > # set this to true if you want to avoid deadlock situation when
> > # replication enabled.
> > # there will be noticable performance degration, however.
> > # a work around is set this to false and insert /*STRICT*/ comment
> > # at the beginning of the SQL command.
> > replication_strict = true
> > # when replication_strict is set to false, there will be a chance for
> > # deadlocks. set this to non 0 (in milli seconds) to detect this
> > # situation and resolve the deadlock aborting current session.
> > replication_timeout = 5000
> > # load balancing mode. i.e. all SELECT except in a transaction block
> > # are load balanced. This is ignored if replication_mode is false.
> > load_balance_mode = true
> > # load balance weight for master and secondary. actual weight is
> > # calculated by weight_master:weight_secondary. For example both
> > #
> > # weight_master = 10 and weight_secondary = 5
> > # weight_master = 4 and weight_secondary = 2
> > #
> > # are regarded as master has double the weight comparing with secondary.
> > # master and secondary have same weight in the default.
> > weight_master = 0.5
> > weight_secondary = 0.5
> > # if there's a data mismatch between master and secondary
> > # start degenration to stop replication mode
> > replication_stop_on_mismatch = false
> > # semicolon separated list of quries to be issued at the end of session
> > reset_query_list = 'ABORT; RESET ALL; SET SESSION AUTHORIZATION DEFAULT'
> > # if true print time stamp to each log line
> > print_timestamp = true
> > # if true, operate in master/slave mode
> > master_slave_mode = true
> > # if true, cache connection pool
> > connection_cache = true
> > # health check timeout. 0 means no timeout;
> > health_check_timeout = 20
> > # health check period. 0 means no health check
> > health_check_period = 0
> > # health check user
> > health_check_user = 'nobody'
> >
> > Thanks for your help,
> > Kevin
> >
> >
> >
> >
> > ---------------------------------
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