Lua batch_queue failed to process entries

[jmicceri]

Is there an existing issue for this?

• I have searched the existing issues

Kong version ($ kong version)

3.1.1

Current Behavior

After upgrading to version 3.1.1 (up from 3.0.2) we starting seeing millions (~165M) of the following warning in our Kong/nginx logs:

3824#0: *31876612 [lua] batch_queue.lua:183: failed to process entries: nil

After downgrading back to 3.0.2, the warnings went away. Are there other changes that need to be made on our end as part of the upgrade? Checking the upgrade notes, I don't see any other packages or steps that need to be taken

Expected Behavior

Kong should be able to process all entries and there shouldn't be an increase in the number of warning logs produced

Steps To Reproduce

1. Change Kong version from 3.0.2 → 3.1.1
2. Deploy Kong service (running as docker container)
3. Check NGINX logs and view increase in WARN level messages

Anything else?

No response

[hanshuebner]

Hi @jmicceri,

can you share a couple of details of your configuration? We're particularly interested in the plugins that you're using and the request volume.

Thank you!
Hans

[hanshuebner]

@jmicceri We've located the source of the problem and a fix is already available on the master branch (0eae6b9). It will be included in the next releases.

[locao]

Closing this issue as it was fixed by #10126.