Gitlab fails to accept Gitlab runner traces, jobs get stuck and timeout

Summary

Gitlab does not process CI/CD job traces and does not reply to runners, thus jobs get stuck and end up in timeout.

Steps to reproduce

1. Trigger a new pipeline in our self-hosted Gitlab instance.
2. The jobs get picked up by self-hosted runners.
3. The job trace shows only the first lines of the log, then it gets stuck.

What is the current bug behavior?

Jobs traces don't show as complete, even though the Gitlab runner shows jobs as succeeded.

What is the expected correct behavior?

Job traces should be accepted by Gitlab.

Relevant logs and/or screenshots

Gitlab runner output:

Mar 23 13:51:39  gitlab-runner[1463266]: Job succeeded                                       duration_s=89.758777136 job=105118 project=416 runner=KAzMiQhy
Mar 23 13:51:58 gitlab-runner[1463266]: ERROR: Appending trace to coordinator... error couldn't execute PATCH against https://[redacted]/api/v4/jobs/105117/trace?debug_trace=false: Patch "https://[redacted]/api/v4/jobs/105117/trace?debug_trace=false": EOF  runner=KAzMiQhy
Mar 23 13:52:02 gitlab-runner[1463266]: ERROR: Appending trace to coordinator... error couldn't execute PATCH against https://[redacted]/api/v4/jobs/105116/trace?debug_trace=false: Patch "https://[redacted]/api/v4/jobs/105116/trace?debug_trace=false": EOF  runner=KAzMiQhy

It happens with different runners in different environments, versions 14.8 and 15.10.0 were tested (we upgraded everything to ensure it wasn't related to the runner version).

Job trace output:

There are no relevant logs in the Gitlab logs. The Nginx proxy doesn't show the request as either processed or failed until it times out. There are no traces of the missing PATCH calls in the logs either.

We have only found this message: Cannot obtain an exclusive lease for ci/pipeline_processing/atomic_processing_service::pipeline_id:26778. There must be another instance already in execution.. However, according to #331033 (closed), it should be ignored. We nevertheless tried the steps listed in that issue to remove the exclusive leases to see if it would fix our issue, without success.

Output of checks

Results of GitLab environment info

This has started happening today, we did not do any changes to the environment.

The issue happens with different runners on different networks. We have checked and there are no issues with firewalls, the requests are getting to Gitlab, but it's not responding.

Expand for output related to GitLab environment info

System information
System:
Current User:   git
Using RVM:      no
Ruby Version:   2.7.7p221
Gem Version:    3.1.6
Bundler Version:2.3.15
Rake Version:   13.0.6
Redis Version:  6.2.8
Sidekiq Version:6.5.7
Go Version:     unknown

GitLab information
Version:        15.9.3
Revision:       f030ca96950
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     PostgreSQL
DB Version:     12.12
URL:            https://[redacted]
HTTP Clone URL: https://[redacted]/some-group/some-project.git
SSH Clone URL:  git@[redacted]:some-group/some-project.git
Using LDAP:     no
Using Omniauth: yes
Omniauth Providers:

GitLab Shell
Version:        14.17.0
Repository storages:
- default:      unix:/var/opt/gitlab/gitaly/gitaly.socket
GitLab Shell path:              /opt/gitlab/embedded/service/gitlab-shell

Results of GitLab application Check

Expand for output related to the GitLab application check

Checking GitLab subtasks ...
Checking GitLab Shell ...
GitLab Shell: ... GitLab Shell version >= 14.17.0 ? ... OK (14.17.0)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Internal API available: OK
Redis available via internal API: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Gitaly ...
Gitaly: ... default ... OK
Checking Gitaly ... Finished
Checking Sidekiq ...
Sidekiq: ... Running? ... yes
Number of Sidekiq processes (cluster/worker) ... 1/1
Checking Sidekiq ... Finished
Checking Reply by email ... Finished
Checking Incoming Email ... Finished
Checking LDAP ...
LDAP: ... LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab App ...
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Cable config exists? ... yes
Resque config exists? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Systemd unit files or init script exist? ... skipped (omnibus-gitlab has neither init script nor systemd units)
Systemd unit files or init script up-to-date? ... skipped (omnibus-gitlab has neither init script nor systemd units)
Projects have namespace: ...
27/19 ... yes
84/22 ... yes
8/37 ... yes
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435/560 ... yes
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435/562 ... yes
109/563 ... yes
116/564 ... yes
435/567 ... yes
105/569 ... yes
Redis version >= 6.0.0? ... yes
Ruby version >= 2.7.2 ? ... yes (2.7.7)
Git user has default SSH configuration? ... yes
Active users: ... 37
Is authorized keys file accessible? ... yes
GitLab configured to store new projects in hashed storage? ... yes
All projects are in hashed storage? ... yes
Checking GitLab App ... Finished
Checking GitLab subtasks ... Finished

Possible fixes