[KAFKA-14645] Plugin classloader not used when retrieving connector plugin config defs via REST API

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.2.0, 3.3.0, 3.2.1, 3.4.0, 3.2.2, 3.2.3, 3.3.1, 3.3.2
• Fix Version/s: 3.2.4, 3.5.0, 3.4.1, 3.3.3
• Component/s: connect
• External issue URL: https://github.com/kcctl/kcctl/issues/266
• Assignee: Chris Egerton
• Reporter: Chris Egerton
• Created: 23/Jan/23 15:58
• Updated: 28/Mar/23 16:43
• Resolved: 30/Jan/23 17:06

Description

We don't switch to the plugin classloader when servicing requests to the GET /connector-plugins/<type>/config endpoint, which can result in classloading failures for, e.g., properties that accept the name of a pluggable class to load.

Reported externally in https://github.com/kcctl/kcctl/issues/266

Issue Links

• is related to: KAFKA-14670 Refactor connect plugins to be called from wrapper classes
• relates to: KAFKA-13510 KIP-769: Connect APIs to list all connector plugins and retrieve their configuration definitions
• links to: GitHub Pull Request #13148