[NIFI-5308] Avoid holding DOM Node for templates in memory

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.7.0
• Component/s: Core Framework
• Assignee: Mark Payne
• Reporter: Mark Payne
• Created: 13/Jun/18 19:35
• Updated: 13/Jun/18 20:01
• Resolved: 13/Jun/18 20:01

Description

As part of the changes made for NIFI-950, in order to improve clustering stability we changed the serialization of templates so that once serialized, we keep the DOM node in memory because it's much more efficient than serializing each time. However, use of the application has shown that with a fairly significant number of templates, the DOM nodes can lead to rather extensive heap utilization, causing the nodes themselves to become unstable. It's better to avoid this caching and just revert to the way that we previously were handling template serialization.

Issue Links

• links to: GitHub Pull Request #2790