[Pgpool-general] stuck with a shmem_exit after the loading of "/usr/local/etc/pool_hba.conf"

Thu Feb 3 10:07:34 UTC 2011

Is your PG server running? Can you please change your logdir in pgpool.conf to  
"logdir = '/tmp" and restart the pgpool and redirect it's output to 
/tmp/pgpool.log ? and see what this log says.

________________________________
From: Bharath Keshav <bharath.keshav at gmail.com>
To: Sandeep Thakkar <sandeeptt at yahoo.com>
Cc: pgpool-general at pgfoundry.org
Sent: Thu, February 3, 2011 3:21:12 PM
Subject: Re: [Pgpool-general] stuck with a shmem_exit after the loading of 
"/usr/local/etc/pool_hba.conf"

You are right, it's running. However, I am not able to connect using the 
cmmands psql -p 9999 -U postgres. I get the following error:

psql: server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.

Also, through the web interface which is working, I don't get anything when I 
click the "node info" button..which means it's empty

The following is my configuration:

#
# pgpool-II configuration file sample
# $Header: 
/cvsroot/pgpool/pgpool-web/contrib_docs/simple_sr_setting/pgpool.conf,v 1.1 
2010/11/04 04:39:57 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

# Port number for pgpool communication manager
pcp_port = 9898

# Unix domain socket path.  (The Debian package defaults to
# /var/run/postgresql.)
socket_dir = '/var/run/postgresql'

# Unix domain socket path for pgpool communication manager.
# (Debian package defaults to /var/run/postgresql)
pcp_socket_dir = '/tmp'

# Unix domain socket path for the backend. Debian package defaults to 
/var/run/postgresql!
backend_socket_dir = '/var/run/postgresql'

# pgpool communication manager timeout. 0 means no timeout, but strongly not 
recommended!
pcp_timeout = 10

# number of pre-forked child process
num_init_children = 32

# Number of connection pools allowed for a child process
max_pool = 4

# If idle for this many seconds, child exits.  0 means no timeout.
child_life_time = 0

# If idle for this many seconds, connection to PostgreSQL closes.
# 0 means no timeout.
connection_life_time = 0

# If child_max_connections connections were received, child exits.
# 0 means no exit.
child_max_connections = 0

# If client_idle_limit is n (n > 0), the client is forced to be
# disconnected whenever after n seconds idle (even inside an explicit
# transactions!)
# 0 means no disconnect.
client_idle_limit = 0

# Maximum time in seconds to complete client authentication.
# 0 means no timeout.
authentication_timeout = 60

# Logging directory
logdir = '/var/log/pgpool'

# pid file name
pid_file_name = '/var/run/pgpool/pgpool.pid'

# Replication mode
replication_mode = true

# Load balancing mode, i.e., all SELECTs are load balanced.
# This is ignored if replication_mode is false.
load_balance_mode = true

# If there's a disagreement with the packet kind sent from backend,
# then degenrate the node which is most likely "minority".  If false,
# just force to exit this session.
replication_stop_on_mismatch = false

# If there's a disagreement with the number of affected tuples in
# UPDATE/DELETE, then degenrate the node which is most likely
# "minority".
# If false, just abort the transaction to keep the consistency.
failover_if_affected_tuples_mismatch = true

# If true, replicate SELECT statement when load balancing is disabled.
# If false, it is only sent to the master node.
replicate_select = false

# Semicolon separated list of queries to be issued at the end of a session
reset_query_list = 'ABORT;DISCARD ALL'

# white_function_list is a comma separated list of function names
# those do not write to database. Any functions not listed here
# are regarded to write to database and SELECTs including such 
# writer-functions will be executed on master(primary) in master/slave
# mode, or executed on all DB nodes in replication mode.
#
# black_function_list is a comma separated list of function names
# those write to database. Any functions not listed here
# are regarded not to write to database and SELECTs including such 
# read-only-functions will be executed on any DB nodes.
#
# You cannot make full both white_function_list and
# black_function_list at the same time. If you specify something in
# one of them, you should make empty other.
#
# Pre 3.0 pgpool-II recognizes nextval and setval in hard coded
# way. Following setting will do the same as the previous version.
# white_function_list = ''
# black_function_list = 'nextval,setval'
white_function_list = ''
#black_function_list = ''
black_function_list = 'nextval,setval,foo'

# If true print timestamp on each log line.
print_timestamp = true

# If true, operate in master/slave mode.
master_slave_mode = false

# Master/slave sub mode. either 'slony' or 'stream'. Default is 'slony'.
# master_slave_sub_mode = 'stream'
master_slave_sub_mode = 'stream'

# If the standby server delays more than delay_threshold,
# any query goes to the primary only. The unit is in bytes.
# 0 disables the check. Default is 0.
# Note that health_check_period required to be greater than 0
# to enable the functionality.
delay_threshold = 100

# 'always' logs the standby delay whenever health check runs.
# 'if_over_threshold' logs only if the delay exceeds delay_threshold.
# 'none' disables the delay log.
log_standby_delay = 'if_over_threshold'
#log_standby_delay = 'always'

# If true, cache connection pool.
connection_cache = true

# Health check timeout.  0 means no timeout.
health_check_timeout = 10

# Health check period.  0 means no health check.
health_check_period = 10

# Health check user
health_check_user = 'www-data'

# Execute command by failover.
# special values:  %d = node id
#                  %h = host name
#                  %p = port number
#                  %D = database cluster path
#                  %m = new master node id
#                  %M = old master node id
#                  %H = new master node host name
#                  %P = old primary node id
#                  %% = '%' character
#
failover_command = '/usr/local/etc/failover.sh %d "%h" %p %D %m %M "%H" %P'

# Execute command by failback.
# special values:  %d = node id
#                  %h = host name
#                  %p = port number
#                  %D = database cluster path
#                  %m = new master node id
#                  %M = old master node id
#                  %% = '%' character
#
failback_command = '/bin/rm -f /tmp/trigger_file1'

# If true, trigger fail over when writing to the backend communication
# socket fails. This is the same behavior of pgpool-II 2.2.x or
# earlier. If set to false, pgpool will report an error and disconnect
# the session.
fail_over_on_backend_error = false

# If true, automatically lock table with INSERT statements to keep SERIAL
# data consistency.  An /*INSERT LOCK*/ comment has the same effect.  A
# /NO INSERT LOCK*/ comment disables the effect.
insert_lock = true

# If true, ignore leading white spaces of each query while pgpool judges
# whether the query is a SELECT so that it can be load balanced.  This
# is useful for certain APIs such as DBI/DBD which is known to adding an
# extra leading white space.
ignore_leading_white_space = false

# If true, print all statements to the log.  Like the log_statement option
# to PostgreSQL, this allows for observing queries without engaging in full
# debugging.
log_statement = true

# If true, print all statements to the log. Similar to log_statement except
# that prints DB node id and backend process id info.
log_per_node_statement = true

# If true, incoming connections will be printed to the log.
log_connections = false

# If true, hostname will be shown in ps status. Also shown in
# connection log if log_connections = true.
# Be warned that this feature will add overhead to look up hostname.
log_hostname = false

# if non 0, run in parallel query mode
parallel_mode = false

# if non 0, use query cache
enable_query_cache = false

#set pgpool2 hostname 
pgpool2_hostname = 'localhost'

# system DB info
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_hostname, backend_port, backend_weight
# here are examples

# - HBA -

# If true, use pool_hba.conf for client authentication. In pgpool-II
# 1.1, the default value is false. The default value will be true in
# 1.2.
enable_pool_hba = false

# md5 authentication file name. '' disables md5 authentication.
# To enable md5 auth, enable_pool_hba to true.
# Default is 'pool_passwd'.
pool_passwd = not_revealed

# - online recovery -
# online recovery user
recovery_user = 'postgres'

# online recovery password
recovery_password = not_revealed

# execute a command in first stage.
recovery_1st_stage_command = 'basebackup.sh'

# execute a command in second stage.
recovery_2nd_stage_command = ''

# maximum time in seconds to wait for remote start-up. 0 means no wait
recovery_timeout = 60

# If client_idle_limit_in_recovery is n (n > 0), the client is forced
# to be disconnected whenever after n seconds idle (even inside an
# explicit transactions!)  0 means no disconnect. This parameter only
# takes effect in recovery 2nd stage.
client_idle_limit_in_recovery = 0

# Specify table name to lock. This is used when rewriting lo_creat
# command in replication mode. The table must exist and has writable
# permission to public. If the table name is '', no rewriting occurs.
lobj_lock_table = 'pgpool_lobj_lock'

# If true, enable SSL support for both frontend and backend connections.
# note that you must also set ssl_key and ssl_cert for SSL to work in
# the frontend connections.
ssl = true
# path to the SSL private key file
ssl_key = '/usr/local/etc/server.key'
# path to the SSL public certificate file
ssl_cert = '/usr/local/etc/server.crt'

# Debug message verbosity level. 0: no message, 1 <= : more verbose
debug_level = 0

replication_timeout = 5000
log_statement = true
ssl_ca_cert = ''
ssl_ca_cert_dir = ''
backend_hostname0 = '67.23.26.182'
backend_port0 = 5432
backend_weight0 = 1
backend_data_directory0 = '/var/lib/postgresql/9.0/main/'
backend_hostname1 = '67.23.29.53'
backend_port1 = 5432
backend_weight1 = 1
backend_data_directory1 = '/var/lib/postgresql/9.0/main/'
backend_hostname2 = '67.23.27.95'
backend_port2 = 5432
backend_weight2 = 1
backend_data_directory2 = '/var/lib/postgresql/9.0/main/'

On Thu, Feb 3, 2011 at 2:40 PM, Sandeep Thakkar <sandeeptt at yahoo.com> wrote:

>That is the correct output. I think, pgpool must be running fine. Did you check 
>your processes after this? What options do you give while starting pgpool? Use 
>"pgpool -d -D -f pgpool.conf". 
>
>
>
>
________________________________
From: Bharath Keshav <bharath.keshav at gmail.com>
>To: pgpool-general at pgfoundry.org
>Sent: Thu, February 3, 2011 2:32:21 PM
>Subject: [Pgpool-general] stuck with a shmem_exit after the loading of  
>"/usr/local/etc/pool_hba.conf"
>
>
>I am getting the following error when I try to run Pgpool. I am trying to use 
>postgresql 9.0 hot streaming and then load balancing capability of Pgpool. 
>However, I am stuck with a shmem_exit after the loading 
>of "/usr/local/etc/pool_hba.conf", as attached below. Please let me know what 
>could be wrong.
>
>
>
>
>2011-02-03 08:53:20 DEBUG: pid 12138: key: listen_addresses
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '*' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: port
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 9999 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: pcp_port
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 9898 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: socket_dir
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '/var/run/postgresql' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: pcp_socket_dir
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '/tmp' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: backend_socket_dir
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '/var/run/postgresql' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: pcp_timeout
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 10 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: num_init_children
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 32 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: max_pool
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 4 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: child_life_time
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 0 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: connection_life_time
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 0 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: child_max_connections
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 0 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: client_idle_limit
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 0 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: authentication_timeout
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 60 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: logdir
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '/var/log/pgpool' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: pid_file_name
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '/var/run/pgpool/pgpool.pid' kind: 
>4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: replication_mode
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: load_balance_mode
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: replication_stop_on_mismatch
>2011-02-03 08:53:20 DEBUG: pid 12138: value: false kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: replication_stop_on_mismatch: 0
>2011-02-03 08:53:20 DEBUG: pid 12138: key: failover_if_affected_tuples_mismatch
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: failover_if_affected_tuples_mismatch: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: replicate_select
>2011-02-03 08:53:20 DEBUG: pid 12138: value: false kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: replicate_select: 0
>2011-02-03 08:53:20 DEBUG: pid 12138: key: reset_query_list
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'ABORT;DISCARD ALL' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: extract_string_tokens: token: ABORT
>2011-02-03 08:53:20 DEBUG: pid 12138: extract_string_tokens: token: DISCARD ALL
>2011-02-03 08:53:20 DEBUG: pid 12138: key: white_function_list
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: black_function_list
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'nextval,setval,foo' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: extract_string_tokens: token: nextval
>2011-02-03 08:53:20 DEBUG: pid 12138: extract_string_tokens: token: setval
>2011-02-03 08:53:20 DEBUG: pid 12138: extract_string_tokens: token: foo
>2011-02-03 08:53:20 DEBUG: pid 12138: key: print_timestamp
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: master_slave_mode
>2011-02-03 08:53:20 DEBUG: pid 12138: value: false kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: master_slave_sub_mode
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'stream' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: delay_threshold
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 100 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: log_standby_delay
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'if_over_threshold' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: connection_cache
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: health_check_timeout
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 10 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: health_check_period
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 10 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: health_check_user
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'www-data' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: failover_command
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '/usr/local/etc/failover.sh %d "%h" 
>%p %D %m %M "%H" %P' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: failback_command
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '/bin/rm -f /tmp/trigger_file1' 
>kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: fail_over_on_backend_error
>2011-02-03 08:53:20 DEBUG: pid 12138: value: false kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: insert_lock
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: ignore_leading_white_space
>2011-02-03 08:53:20 DEBUG: pid 12138: value: false kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: log_statement
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: log_per_node_statement
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: log_connections
>2011-02-03 08:53:20 DEBUG: pid 12138: value: false kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: log_hostname
>2011-02-03 08:53:20 DEBUG: pid 12138: value: false kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: parallel_mode
>2011-02-03 08:53:20 DEBUG: pid 12138: value: false kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: enable_query_cache
>2011-02-03 08:53:20 DEBUG: pid 12138: value: false kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: pgpool2_hostname
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '67.23.26.182' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: system_db_hostname
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '67.23.26.182' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: system_db_port
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 5432 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: system_db_dbname
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'pgpool' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: system_db_schema
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'pgpool_catalog' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: system_db_user
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'pgpool' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: system_db_password
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: enable_pool_hba
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: pool_passwd
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'pool_passwd' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: recovery_user
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'postgres' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: recovery_password
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'pgpoolAdmin' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: recovery_1st_stage_command
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'basebackup.sh' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: recovery_2nd_stage_command
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: recovery_timeout
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 60 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: client_idle_limit_in_recovery
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 0 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: key: lobj_lock_table
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 'pgpool_lobj_lock' kind: 4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: ssl
>2011-02-03 08:53:20 DEBUG: pid 12138: value: true kind: 1
>2011-02-03 08:53:20 DEBUG: pid 12138: key: ssl_key
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '/usr/local/etc/server.key' kind: 
4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: ssl_cert
>2011-02-03 08:53:20 DEBUG: pid 12138: value: '/usr/local/etc/server.crt' kind: 
4
>2011-02-03 08:53:20 DEBUG: pid 12138: key: debug_level
>2011-02-03 08:53:20 DEBUG: pid 12138: value: 0 kind: 2
>2011-02-03 08:53:20 DEBUG: pid 12138: loading "/usr/local/etc/pool_hba.conf" for 
>client authentication configuration file
>2011-02-03 08:53:20 DEBUG: pid 12138: shmem_exit(0)
>
>
>
>
>thanks, 
>Bharath
>

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