Good Morning,
Beginning yesterday morning, users have been unable to fully connect to our DB
Instance.
1. At the time of the initial report - I was connected to the DB via
pgAdmin and could perform queries without problem.
2. Users reported messages similar to "could not open file
"global/11801": No such file or directory"
3. At that time, connection logging was turned off and there were no
messages in the log files.
4. As this is a development environment, I turned logging on in the
config and restarted the DB
5. After restart, neither I, nor the Users could fully reconnect.
6. I have performed a SYS Level backup (tar of the whole postgres
directory tree)
7. I cannot perform a DB level Backup (same errors occur)
System Details
Linux Debian 7.11
Postgres 9.1 (9.1.24lts-0+d)
It appears that we can connect to the DB Server itself as I get "connection
received" and "connection authorized" - but when trying to access the DB
itself, several errors are raised (see below).
I am assuming that some internals are no longer consistent - the file
"global/11801" for instance really does not exist on the system.
Questions:
1. Is there any way to recover from this (backup is unfortunately rather
old)
2. What are possible causes? I'd like to prevent this from happening on
my production servers.
** I am aware that we are on older releases, and yes, we plan to migrate to
more current releases "soon" (tm) ...
Thanks in advance.
John Boblitz
Exceprt from Log:
2018-07-04 09:15:13 CEST 192.168.250.50(28559) [unknown]LOG: connection
received: host=192.168.250.50 port=28559
2018-07-04 09:15:14 CEST 192.168.250.50(28559) postgresLOG: connection
authorized: user=dbadmin database=postgres
2018-07-04 09:15:14 CEST 192.168.250.50(28559) postgresERROR: could not open
file "global/11801": No such file or directory
2018-07-04 09:15:14 CEST 192.168.250.50(28559) postgresSTATEMENT: SELECT
usecreatedb, usesuper, CASE WHEN usesuper THEN pg_postmaster_start_time() ELSE
NULL END as upsince, CASE WHEN usesuper THEN pg_conf_load_time() ELSE NULL END
as confloadedsince, CASE WHEN usesuper THEN pg_is_in_recovery() ELSE NULL END
as inrecovery, CASE WHEN usesuper THEN pg_last_xlog_receive_location() ELSE
NULL END as receiveloc, CASE WHEN usesuper THEN pg_last_xlog_replay_location()
ELSE NULL END as replayloc, CASE WHEN usesuper THEN
pg_last_xact_replay_timestamp() ELSE NULL END as replay_timestamp, CASE WHEN
usesuper AND pg_is_in_recovery() THEN pg_is_xlog_replay_paused() ELSE NULL END
as isreplaypaused
FROM pg_user WHERE usename=current_user
2018-07-04 09:15:19 CEST 192.168.250.50(28559) postgresERROR: could not open
file "global/11801": No such file or directory
2018-07-04 09:15:19 CEST 192.168.250.50(28559) postgresSTATEMENT: SELECT
rolcreaterole, rolcreatedb FROM pg_roles WHERE rolname = current_user;
2018-07-04 09:15:22 CEST 192.168.250.50(28561) [unknown]LOG: connection
received: host=192.168.250.50 port=28561
2018-07-04 09:15:22 CEST 192.168.250.50(28561) g11BaseLOG: connection
authorized: user=dbadmin database=g11Base
2018-07-04 09:15:23 CEST 192.168.250.50(28561) g11BaseERROR: could not open
file "pg_tblspc/24579/PG_9.1_201105231/24580/11866": No such file or directory
2018-07-04 09:15:23 CEST 192.168.250.50(28561) g11BaseSTATEMENT: SELECT CASE
WHEN nspname LIKE E'pg\\_temp\\_%' THEN 1
WHEN (nspname LIKE E'pg\\_%') THEN 0
ELSE 3 END AS nsptyp,
nsp.nspname, nsp.oid, pg_get_userbyid(nspowner) AS
namespaceowner, nspacl, description, has_schema_privilege(nsp.oid,
'CREATE') as cancreate,
(SELECT array_agg(label) FROM pg_seclabels sl1 WHERE
sl1.objoid=nsp.oid) AS labels,
(SELECT array_agg(provider) FROM pg_seclabels sl2 WHERE
sl2.objoid=nsp.oid) AS providers
FROM pg_namespace nsp
LEFT OUTER JOIN pg_description des ON (des.objoid=nsp.oid AND
des.classoid='pg_namespace'::regclass)
WHERE NOT ((nspname = 'pg_catalog' AND EXISTS (SELECT 1 FROM
pg_class WHERE relname = 'pg_class' AND relnamespace = nsp.oid LIMIT 1)) OR
(nspname = 'pgagent' AND EXISTS (SELECT 1 FROM pg_class WHERE
relname = 'pga_job' AND relnamespace = nsp.oid LIMIT 1)) OR
(nspname = 'information_schema' AND EXISTS (SELECT 1 FROM
pg_class WHERE relname = 'tables' AND relnamespace = nsp.oid LIMIT 1)) OR
(nspname LIKE '_%' AND EXISTS (SELECT 1 FROM pg_proc WHERE
proname='slonyversion' AND pronamespace = nsp.oid LIMIT 1))
) AND nspname NOT LIKE E'pg\\_temp\\_%'AND nspname NOT LIKE
E'pg\\_toast_temp\\_%' ORDER BY 1, nspname
