[HIVE-13006] LLAP: add finer-grained classloaders as an option to be able to block the usage of removed UDFs

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned Assign to me
• Reporter: Sergey Shelukhin
• Created: 05/Feb/16 02:48
• Updated: 05/Feb/16 02:51

Description

Right now we add an epic global classloader for executors via a thread factory, so once added, UDFs cannot really be removed until restart. Changing the classloader for threadpool threads might not be possible, so we'd need to make executor threads (or the threadpool) custom.

Issue Links

• is blocked by: HIVE-12856 LLAP: update (add/remove) the UDFs available in LLAP when they are changed (refresh periodically)