[ZEPPELIN-4859] Use PooledObject for the connection from interpreter process to zeppelin server

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.9.0
• Component/s: zeppelin-interpreter
• Assignee: Jeff Zhang
• Reporter: Jeff Zhang
• Created: 07/Jun/20 07:34
• Updated: 24/Dec/20 03:19
• Resolved: 09/Jun/20 05:50

Description

Otherwise, once the connection is lost, interpreter process can never connect to zeppelin sever again. We use PooledObject for the connection from zeppelin-server to interpreter process, we should do the same thing for the connection from interpreter process to zeppelin server