Troubles with logical replication
Opened this issue · 6 comments
Describe the bug
We are using PostgreSQL logical replication (with debezium). And there are multiple logical replication processes per cluster.
This is what pg_stat_replication shows:
database=# select pid,usename,application_name,client_addr,state from pg_stat_replication ;
pid | usename | application_name | client_addr | state
-------+---------------------+------------------------+-------------+-----------
11090 | replication | pg_slave_server | 10.75.3.202 | streaming
30410 | debezium_replicator | PostgreSQL JDBC Driver | 10.75.3.105 | streaming
30411 | debezium_replicator | PostgreSQL JDBC Driver | 10.75.3.105 | streaming
pgscv does not work in such setup.
Errors looks like this:
curl -s localhost:9890/metrics
An error has occurred while serving metrics:
6 error(s) occurred:
* collected metric "postgres_replication_lag_bytes" { label:<name:"application_name" value:"PostgreSQL JDBC Driver" > label:<name:"client_addr" value:"10.75.3.105/32" > label:<name:"lag" value:"pending" > label:<name:"service_id" value:"postgres:5432" > label:<name:"state" value:"streaming" > label:<name:"user" value:"debezium_replicator" > gauge:<value:0 > } was collected before with the same name and label values
* collected metric "postgres_replication_lag_bytes" { label:<name:"application_name" value:"PostgreSQL JDBC Driver" > label:<name:"client_addr" value:"10.75.3.105/32" > label:<name:"lag" value:"write" > label:<name:"service_id" value:"postgres:5432" > label:<name:"state" value:"streaming" > label:<name:"user" value:"debezium_replicator" > gauge:<value:-4.11433728e+08 > } was collected before with the same name and label values
* collected metric "postgres_replication_lag_seconds" { label:<name:"application_name" value:"PostgreSQL JDBC Driver" > label:<name:"client_addr" value:"10.75.3.105/32" > label:<name:"lag" value:"write" > label:<name:"service_id" value:"postgres:5432" > label:<name:"state" value:"streaming" > label:<name:"user" value:"debezium_replicator" > gauge:<value:0 > } was collected before with the same name and label values
* collected metric "postgres_replication_lag_seconds" { label:<name:"application_name" value:"PostgreSQL JDBC Driver" > label:<name:"client_addr" value:"10.75.3.105/32" > label:<name:"lag" value:"flush" > label:<name:"service_id" value:"postgres:5432" > label:<name:"state" value:"streaming" > label:<name:"user" value:"debezium_replicator" > gauge:<value:0 > } was collected before with the same name and label values
* collected metric "postgres_replication_lag_seconds" { label:<name:"application_name" value:"PostgreSQL JDBC Driver" > label:<name:"client_addr" value:"10.75.3.105/32" > label:<name:"lag" value:"replay" > label:<name:"service_id" value:"postgres:5432" > label:<name:"state" value:"streaming" > label:<name:"user" value:"debezium_replicator" > gauge:<value:0 > } was collected before with the same name and label values
* collected metric "postgres_replication_lag_all_seconds" { label:<name:"application_name" value:"PostgreSQL JDBC Driver" > label:<name:"client_addr" value:"10.75.3.105/32" > label:<name:"service_id" value:"postgres:5432" > label:<name:"state" value:"streaming" > label:<name:"user" value:"debezium_replicator" > gauge:<value:0 > } was collected before with the same name and label values
And its seems to be truly that data was collected before with the same name and label values
Steps to reproduce
Use postgresql 11 with multiple logical replication walsenders.
Expected behavior
There should be no errors and exporter mast work correctly.
pgSCV startup options
services:
"postgres:5432":
service_type: "postgres"
conninfo: "postgres://postgres@127.0.0.1:5432/postgres"
defaults:
postgres_username: "pgscv"
postgres_password: "XXX"
Errors and Logs
All are in Describe the bug section
Environment (please complete the following information):
- Used OS (or Containers): [output of
cat /etc/os-release
]
NAME="Ubuntu"
VERSION="18.04.5 LTS (Bionic Beaver)"
- pgSCV Version [output of
pgscv --version
]
pgscv 0.7.5 d52f09925a44a67493bd8c598a42c7455e182d5e-release
- PostgreSQL Version [output of
psql -c 'select version()'
]
PostgreSQL 11.8 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0, 64-bit
patroni 2.0.2
- Do PostgreSQL and pgSCV are running on the same host?
Yes
Additional context
None
Hello there, guys!
We have the same problem:
cannot read data: unexpected status code returned when scraping "http://postgres-02.********:9890/metrics": 500; expecting 200; response body: "An error has occurred while serving metrics:\n\n9 error(s) occurred:\n* collected metric \"postgres_replication_lag_bytes\" { label:<name:\"application_name\" value:\"PostgreSQL JDBC Driver\" > label:<name:\"client_addr\" value:\"10.*****.132/32\" > label:<name:\"lag\" value:\"pending\" > label:<name:\"service_id\" value:\"postgres\" > label:<name:\"state\" value:\"streaming\" > label:<name:\"user\" value:\"debezium\" > gauge:<value:0 > } was collected before with the same name and label values\n* collected metric \"postgres_replication_lag_bytes\" { label:<name:\"application_name\" value:\"PostgreSQL JDBC Driver\" > label:<name:\"client_addr\" value:\"10.******.132/32\" > label:<name:\"lag\" value:\"write\" > label:<name:\"service_id\" value:\"postgres\" > label:<name:\"state\" value:\"streaming\" > label:<name:\"user\" value:\"debezium\" > gauge:<value:4.38588e+06 > } was collected before with the same name and label values\n* collected metric \"postgres_replication_lag_bytes\" { label:<name:\"application_name\" value:\"PostgreSQL JDBC Driver\" > label:<name:\"client_addr\" value:\"10.11.3.132/32\" > label:<name:\"lag\" value:\"flush\" > label:<name:\"service_id\" value:\"postgres\" > label:<name:\"state\" value:\"streaming\" > label:<name:\"user\" value:\"debezium\" > gauge:<value:2.3684544e+07 > } was collected before with the same name and label values\n* collected metric \"postgres_replication_lag_bytes\" { label:<name:\"application_name\" value:\"PostgreSQL JDBC Driver\" > label:<name:\"client_addr\" value:\"10.******.132/32\" > label:<name:\"lag\" value:\"replay\" > label:<name:\"service_id\" value:\"postgres\" > label:<name:\"state\" value:\"streaming\" > label:<name:\"user\" value:\"debezium\" > gauge:<value:0 > } was collected before with the same name and label values\n* collected metric \"postgres_replication_lag_seconds\" { label:<name:\"application_name\" value:\"PostgreSQL JDBC Driver\" > label:<name:\"client_addr\" value:\"10.******.132/32\" > label:<name:\"lag\" value:\"write\" > label:<name:\"service_id\" value:\"postgres\" > label:<name:\"state\" value:\"streaming\" > label:<name:\"user\" value:\"debezium\" > gauge:<value:0 > } was collected before with the same name and label values\n* collected metric \"postgres_replication_lag_seconds\" { label:<name:\"application_name\" value:\"PostgreSQL JDBC Driver\" > label:<name:\"client_addr\" value:\"10.*****.132/32\" > label:<name:\"lag\" value:\"flush\" > label:<name:\"service_id\" value:\"postgres\" > label:<name:\"state\" value:\"streaming\" > label:<name:\"user\" value:\"debezium\" > gauge:<value:0 > } was collected before with the same name and label values\n* collected metric \"postgres_replication_lag_seconds\" { label:<name:\"application_name\" value:\"PostgreSQL JDBC Driver\" > label:<name:\"client_addr\" value:\"10.******.132/32\" > label:<name:\"lag\" value:\"replay\" > label:<name:\"service_id\" value:\"postgres\" > label:<name:\"state\" value:\"streaming\" > label:<name:\"user\" value:\"debezium\" > gauge:<value:0 > } was collected before with the same name and label values\n* collected metric \"postgres_replication_lag_all_bytes\" { label:<name:\"application_name\" value:\"PostgreSQL JDBC Driver\" > label:<name:\"client_addr\" value:\"10.******.132/32\" > label:<name:\"service_id\" value:\"postgres\" > label:<name:\"state\" value:\"streaming\" > label:<name:\"user\" value:\"debezium\" > gauge:<value:2.8070424e+07 > } was collected before with the same name and label values\n* collected metric \"postgres_replication_lag_all_seconds\" { label:<name:\"application_name\" value:\"PostgreSQL JDBC Driver\" > label:<name:\"client_addr\" value:\"10.******.132/32\" > label:<name:\"service_id\" value:\"postgres\" > label:<name:\"state\" value:\"streaming\" > label:<name:\"user\" value:\"debezium\" > gauge:<value:0 > } was collected before with the same name and label values\n"
Maybe there is a way to disable these metrics without affecting others until an update is released?
Hi,
show the content of pg_stat_replication
view.
here:
my_db=# select * from pg_stat_replication ;
pid | usesysid | usename | application_name | client_addr | client_hostname | client_port | backend_start | backend_xmin | state | sent_lsn | write_lsn | flush_lsn | replay_lsn | write_lag | flush_lag | replay_lag | sync_priority | sync_state
------+----------+---------------------+------------------------+-------------+-----------------+-------------+-------------------------------+--------------+-----------+--------------+--------------+--------------+--------------+-----------------+-----------------+-----------------+---------------+------------
5531 | 3645854 | debezium_replicator | PostgreSQL JDBC Driver | 10.77.5.107 | | 44746 | 2022-05-10 14:31:07.873206+03 | | streaming | 501/73936338 | 501/73922D50 | 501/73892370 | 501/73892370 | 00:00:01.307215 | 00:01:11.981775 | 00:01:11.981775 | 0 | async
5336 | 16384 | replication | xx13-xxxxx-db202 | 10.77.5.202 | | 52734 | 2022-05-10 14:30:57.332764+03 | | streaming | 501/73936338 | 501/73936338 | 501/73936338 | 501/73936338 | 00:00:00.000175 | 00:00:00.001996 | 00:00:00.00209 | 0 | async
8389 | 3645854 | debezium_replicator | PostgreSQL JDBC Driver | 10.77.5.107 | | 58564 | 2022-05-11 10:24:41.676769+03 | | catchup | 501/1C194C90 | 4FE/C3F1FBC8 | | | | | | 0 | async
5435 | 3645854 | debezium_replicator | PostgreSQL JDBC Driver | 10.77.5.107 | | 44456 | 2022-05-10 14:31:05.861099+03 | | streaming | 501/73936338 | 501/73920828 | | | | | | 0 | async
3616 | 3645854 | debezium_replicator | PostgreSQL JDBC Driver | 10.77.5.107 | | 39746 | 2022-05-11 00:10:17.071161+03 | | streaming | 501/73936338 | 501/739229E8 | 501/7388AB58 | 501/7388AB58 | 00:00:05.96013 | 00:01:16.642303 | 00:01:16.642303 | 0 | async
3661 | 3645854 | debezium_replicator | PostgreSQL JDBC Driver | 10.77.5.107 | | 40702 | 2022-05-11 00:10:32.522202+03 | | streaming | 501/73936338 | 501/73927948 | 501/738972D0 | 501/738972D0 | 00:00:03.599762 | 00:01:04.287593 | 00:01:04.287593 | 0 | async
7586 | 3645854 | debezium_replicator | PostgreSQL JDBC Driver | 10.77.5.107 | | 54664 | 2022-05-10 14:41:19.176089+03 | | streaming | 501/73936338 | 501/73927B30 | | | | | | 0 | async
7588 | 3645854 | debezium_replicator | PostgreSQL JDBC Driver | 10.77.5.107 | | 54668 | 2022-05-10 14:41:19.177411+03 | | streaming | 501/73936338 | 501/73927948 | | | | | | 0 | async
(8 rows)
same problem
Same issue version 0.7.5 or 0.8.0b6 with pg12