[pgpool-general: 10] Pgpool disconnect clients when recovery nodes.

[Joaquin Llano]

Hi again. 

I have a cluster with 2 postgresql 8.4 backends and 1 pgpool2 3.0.3 version. They are running on Debian Squeeze using backports repository. 

When I try to recovery one of the backends using pcp_recovery_node its fails to recover until all clients connected to pgpool are disconnected. 

Also I tried streaming replication in other machines with PostgreSQL 9.1 but when recover a backend Pgpool drops all clients connected to it. 

Is there ant way to Pgpool maintain clients connected when I recover a dead node? 

This is my pgpool.conf for PostgreSQL 8.4 nodes. 

listen_addresses = '*' 
port = 5432 
pcp_port = 9898 
socket_dir = '/var/run/postgresql' 
pcp_socket_dir = '/var/run/postgresql' 
backend_socket_dir = '/var/run/postgresql' 
pcp_timeout = 10 
num_init_children = 32 
max_pool = 4 
child_life_time = 300 
connection_life_time = 0 
child_max_connections = 0 
client_idle_limit = 0 
authentication_timeout = 60 
logdir = '/var/run/postgresql' 
pid_file_name = '/var/run/postgresql/pgpool.pid' 
replication_mode = true 
load_balance_mode = true 
replication_stop_on_mismatch = true 
replicate_select = false 
reset_query_list = 'ABORT; RESET ALL; SET SESSION AUTHORIZATION DEFAULT' 
print_timestamp = true 
master_slave_mode = false 
connection_cache = true 
health_check_timeout = 3 
health_check_period = 5 
health_check_user = 'pgpool2' 
failover_command = 'pgpool-failover %d %h %p %D %m %M' 
failback_command = 'pgpool-failback %d %h %p %D %m %M' 
insert_lock = true 
ignore_leading_white_space = true 
log_statement = false 
log_connections = false 
log_hostname = false 
parallel_mode = false 
enable_query_cache = false 
pgpool2_hostname = 'ppsqlft1' 
system_db_hostname = 'localhost' 
system_db_port = 5432 
system_db_dbname = 'pgpool' 
system_db_schema = 'pgpool_catalog' 
system_db_user = 'pgpool' 
system_db_password = '' 
backend_hostname0 = 'PPSQLBK1' 
backend_port0 = 5432 
backend_weight0 = 1 
backend_data_directory0 = '/var/lib/postgresql/8.4/main' 
backend_hostname1 = 'PPSQLBK2' 
backend_port1 = 5432 
backend_weight1 = 1 
backend_data_directory1 = '/var/lib/postgresql/8.4/main' 
enable_pool_hba = true 
recovery_user = 'pgpool2' 
recovery_password = '' 
recovery_1st_stage_command = 'base-backup' 
recovery_2nd_stage_command = 'pgpool-recovery-pitr' 
recovery_timeout = 90 
client_idle_limit_in_recovery = 10 


Thanks for your help 

-- 

Joaquín Manuel Llano Montero 

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email : joaquin.llano at comparex.es 
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