[FLINK-33990] Use default classloader in TaskManager when there are no user jars for job

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Labels: pull-request-available
• Assignee: Dan Zou
• Reporter: Dan Zou
• Created: 04/Jan/24 12:15
• Updated: 27/Mar/24 07:40

Description

TaskManager will create a new class loader for each flink job even when it has no user jars, which may cause metaspace increasing. Flink can use system classloader for the jobs without jars. A similar optimization has been made in JM in FLINK-32265, it make sense to optimize it in TM.

Issue Links

• links to: GitHub Pull Request #24572