[NIFI-8919] Refactor Distributed Cache Clients using Netty

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.15.0
• Fix Version/s: 1.15.0
• Component/s: Extensions
• Labels: TLS security
• Assignee: Paul Grey
• Reporter: David Handermann
• Created: 16/Jul/21 19:55
• Updated: 28/Sep/21 20:11
• Resolved: 28/Sep/21 02:09

Description

The DistributedMapCacheClientService and DistributedSetCacheClientService leverage SSLSocketChannel through SSLCommsSession to support TLS communication, which involves custom interaction with javax.net.ssl.SSLEngine. Refactoring these client services using Netty would remove the need for custom SSLEngine interaction and also streamline the protocol implementation. Changes will involve replacement of the existing CommsSession interface with higher-level client and custom Netty Handlers implementation the distributed cache protocol.

Issue Links

• fixes: NIFI-8079 DistributedMapCacheClient not properly closing Sockets on connection failure
• links to: GitHub Pull Request #5311