[pgpool-general: 8104] Problems taking node offline
Jon SCHEWE
jon.schewe at raytheon.com
Tue Apr 26 05:07:00 JST 2022
I want to take a backend node offline and having some trouble with it.
I check the status of my notes:
template1=> show pool_nodes;
node_id | hostname | port | status | lb_weight | role | select_cnt | load_balance_node | replication_delay | replication_state | replication_sync_state | last_status_change
---------+----------------------+------+--------+-----------+---------+------------+-------------------+-------------------+-------------------+------------------------+---------------------
0 | psql-01.mgmt.bbn.com | 5432 | up | 0.333333 | standby | 646198 | false | 0 | streaming | sync | 2022-04-25 14:19:57
1 | psql-02.mgmt.bbn.com | 5432 | up | 0.333333 | primary | 2115353 | true | 0 | | | 2022-04-25 14:16:24
2 | psql-03.mgmt.bbn.com | 5432 | up | 0.333333 | standby | 2913 | false | 0 | streaming | potential | 2022-04-25 14:24:25
(3 rows)
I want to take psql-02 offline.
pcp_detach_node -h psql.mgmt.bbn.com -p 9897 -U pgpool -g -n 1
Password:
pcp_detach_node -- Command Successful
I check the status again:
template1=> show pool_nodes;
node_id | hostname | port | status | lb_weight | role | select_cnt | load_balance_node | replication_delay | replication_state | replication_sync_state | last_status_change
---------+----------------------+------+--------+-----------+---------+------------+-------------------+-------------------+-------------------+------------------------+---------------------
0 | psql-01.mgmt.bbn.com | 5432 | up | 0.333333 | standby | 718555 | true | 0 | streaming | sync | 2022-04-25 14:19:57
1 | psql-02.mgmt.bbn.com | 5432 | up | 0.333333 | primary | 2373454 | false | 0 | | | 2022-04-25 14:16:24
2 | psql-03.mgmt.bbn.com | 5432 | up | 0.333333 | standby | 3310 | false | 0 | streaming | potential | 2022-04-25 14:24:25
(3 rows)
I still see psql-02 online. Why is that?
Log messages during the pcp command:
Apr 25 15:59:48 psql-02 pgpool[11672]: 2022-04-25 15:59:48: pid 11674: LOG: new IPC connection received
Apr 25 15:59:48 psql-02 pgpool[11672]: 2022-04-25 15:59:48: pid 11674: LOG: online recovery request from local pgpool-II node received on IPC interface is forwarded to master watchdog node "psql-02.mgmt.bbn.com:9898 Linux psql-02"
Apr 25 15:59:48 psql-02 pgpool[11672]: 2022-04-25 15:59:48: pid 11674: DETAIL: waiting for the reply...
Apr 25 15:59:48 psql-02 pgpool[11672]: 2022-04-25 15:59:48: pid 13736: LOG: PCP process with pid: 20049 exit with SUCCESS.
Apr 25 15:59:48 psql-02 pgpool[11672]: 2022-04-25 15:59:48: pid 13736: LOG: PCP process with pid: 20049 exits with status 0
Apr 25 15:59:54 psql-02 pgpool[11672]: 2022-04-25 15:59:54: pid 11672: LOG: child process with pid: 19261 exits with status 256
Apr 25 15:59:54 psql-02 pgpool[11672]: 2022-04-25 15:59:54: pid 11672: LOG: fork a new child process with pid: 20176
Apr 25 15:59:54 psql-02 pgpool[11672]: 2022-04-25 15:59:54: pid 11672: LOG: child process with pid: 19006 exits with status 256
Apr 25 15:59:54 psql-02 pgpool[11672]: 2022-04-25 15:59:54: pid 11672: LOG: fork a new child process with pid: 20178
Jon Schewe
Principal Software Systems Technologist
C: +1 612.263.2718
O: +1 952.545.5720
jon.schewe at raytheon.com
Raytheon BBN
Raytheon Intelligence & Space
5775 Wayzata Blvd. Suite 630
St. Louis Park, MN 55416
More information about the pgpool-general
mailing list