[FLINK-14808] ClientUtils set thread ClassLoader that is different from the user cl of PackagedProgram

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.10.0
• Fix Version/s: 1.10.0
• Component/s: Client / Job Submission
• Assignee: Kostas Kloudas
• Reporter: Jingsong Lee
• Created: 15/Nov/19 08:09
• Updated: 18/Nov/19 02:01
• Resolved: 15/Nov/19 11:52

Description

In ClientUtils.executeProgram, it create a new userCodeClassLoader and set it to thread context. (Name it cl1).

But in PackagedProgram, it use a different class loader to create user Class. (Name it cl2).

So in user's code,  if user use thread loader to create a class, this class is come from cl1, if user want to work this class with their own class, there should be a failure, because them come from different class loader.

Root cause: https://issues.apache.org/jira/browse/FLINK-14745

Sub-Tasks

• Add test that verifies that the CLI sets the correct classloader.: Open