[HADOOP-11161] Expose close method in KeyProvider to give clients of Provider implementations a hook to release resources

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.6.0
• Hadoop Flags: Reviewed
• Assignee: Arun Suresh
• Reporter: Arun Suresh
• Created: 03/Oct/14 14:15
• Updated: 01/Dec/14 03:08
• Resolved: 09/Oct/14 01:02

Description

The KMSClientProvider class needs to be have a close() method to shutdown back ground executor threads.

The DFSClient creates an instance of a KeyProvider during initialization. If this KP is a KMSClientProvider, this needs to be closed to prevent thread leakage