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Observation¶

After the recent round of deadlock fixes related to #121768, this one still shows up in the PostgreSQL logs:

$ cd /var/lib/pgsql/data/log/
$ grep deadlock *.log
postgresql-2022-12-21_000000.log:2022-12-21 09:57:08.617 CET openqa geekotest [15607]ERROR:  deadlock detected
postgresql-2022-12-28_000000.log:2022-12-28 15:07:01.876 CET openqa geekotest [10027]ERROR:  deadlock detected
postgresql-2022-12-30_000000.log:2022-12-30 10:50:18.466 CET openqa geekotest [16610]ERROR:  deadlock detected

2022-12-28 15:07:01.876 CET openqa geekotest [10027]ERROR:  deadlock detected
2022-12-28 15:07:01.876 CET openqa geekotest [10027]DETAIL:  Process 10027 waits for ShareLock on transaction 1557948116; blocked by process 9980.
        Process 9980 waits for ShareLock on transaction 1557948117; blocked by process 10027.
        Process 10027: SELECT me.id, me.type, me.name, me.size, me.checksum, me.last_use_job_id, me.fixed, me.t_created, me.t_updated FROM assets me WHERE ( ( me.name = $1 AND me.type = $2 ) ) FOR UPDATE
        Process 9980: SELECT me.id, me.type, me.name, me.size, me.checksum, me.last_use_job_id, me.fixed, me.t_created, me.t_updated FROM assets me WHERE ( ( me.name = $1 AND me.type = $2 ) ) FOR UPDATE

2022-12-30 10:50:18.466 CET openqa geekotest [16610]DETAIL:  Process 16610 waits for ShareLock on transaction 1570088837; blocked by process 16606.
        Process 16606 waits for ShareLock on transaction 1570088839; blocked by process 16610.
        Process 16610: SELECT me.id, me.type, me.name, me.size, me.checksum, me.last_use_job_id, me.fixed, me.t_created, me.t_updated FROM assets me WHERE ( ( me.name = $1 AND me.type = $2 ) ) FOR UPDATE
        Process 16606: SELECT me.id, me.type, me.name, me.size, me.checksum, me.last_use_job_id, me.fixed, me.t_created, me.t_updated FROM assets me WHERE ( ( me.name = $1 AND me.type = $2 ) ) FOR UPDATE

Acceptance criteria¶

• AC1: This deadlock does not show up in the PostgreSQL logs anymore

Suggestions¶

• Look at previous deadlock fixes