[HIVE-21584] Java 11 preparation: system class loader is not URLClassLoader

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0-alpha-1
• Component/s: Hive
• Labels: pull-request-available
• Assignee: Zoltan Matyus
• Reporter: Zoltan Matyus
• Created: 05/Apr/19 12:41
• Updated: 06/Nov/24 00:24
• Resolved: 29/Apr/19 07:15

Description

Currently, Hive assumes that the system class loader is instance of URLClassLoader. In Java 11 this is not the case. There are a few (unresolved) JIRAs about specific occurrences of URLClassLoader (e.g. HIVE-21237, HIVE-17909), but no "remove all occurrences". Also I couldn't find umbrella "Java 11 upgrade" JIRA.

This ticket is to remove all unconditional casts of any random class loader to URLClassLoader.

Issue Links

• causes: HIVE-25107 Classpath logging should be on DEBUG level
• Is contained by: HIVE-27508 Backport of HIVE-21584 to branch-3.1
• Is contained by: HIVE-22096 Backport HIVE-21584 to branch-2.3
• links to: GitHub Pull Request #4522
• links to: GitHub Pull Request #5408
• links to: GitHub Pull Request #5410
• links to: GitHub Pull Request #5411
• links to: GitHub Pull Request #5412
• links to: GitHub Pull Request #5413