[FLINK-5925] Clean up extracted RocksDB JNI library

• Type: Bug
• Status: Open
• Priority: Not a Priority
• Resolution: Unresolved
• Affects Version/s: 1.2.0, 1.3.0
• Component/s: Runtime / State Backends
• Labels: auto-deprioritized-major auto-deprioritized-minor
• Assignee: Unassigned
• Reporter: Till Rohrmann
• Created: 27/Feb/17 09:58
• Updated: 02/Sep/23 10:05

Description

The RocksDBStateBackend extracts the RocksDB jni library from the RocksDB dependency in a temp directory (see RocksDBStateBackend#ensureRocksDBIsLoaded). This file is, however, never removed.

In general, I think we should add a cleanup mechanism which cleans all Task specific files after the Task has completed. The same applies to the TaskManager.