[Tests][Bug] There are multiple memory leaks that cause Pulsar CI to fail with OOME

[lhotari]

Search before asking

• I searched in the issues and found nothing similar.

Read release policy

• I understand that unsupported versions don't get bug fixes. I will attempt to reproduce the issue on a supported version of Pulsar client and Pulsar broker.

Version

master

Minimal reproduce step

Run Pulsar CI master branch build manually.
Usually Unit test group 1 and client impl tests fail. Example https://github.com/apache/pulsar/actions/runs/8835483969/attempts/1

What did you expect to see?

Tests should have memory leaks

What did you see instead?

There are major memory leaks in test execution.

Anything else?

See #22586 comments about the investigation and observations.

Are you willing to submit a PR?

• I'm willing to submit a PR!

[lhotari]

Looks like #22496 is causing problems. I see org.apache.pulsar.broker.service.ReplicatorGlobalNSTest causing memory issues.

[lhotari]

Current assumption of the source of the problems: #21948 (comment)