[NIFI-11245] Allow Reducing Maximum Timer Driven Thread Count Without Restarting

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.0.0, 1.20.0
• Fix Version/s: 2.0.0-M1, 1.21.0
• Component/s: Core Framework
• Assignee: David Handermann
• Reporter: David Handermann
• Created: 02/Mar/23 23:53
• Updated: 03/Mar/23 17:13
• Resolved: 03/Mar/23 16:36

Description

The Maximum Timer Driven Thread Count property in NiFi Controller Settings specifies the total number of Threads that can be spawned and scheduled to run Processors using the default Timer Driven strategy. This setting can be changed on a running system, but reducing the number requires restarting NiFi to apply the changes.

The method responsible for updating the internal Thread Pool size does not allow reducing the core pool size at runtime, which also blocks reducing the Maximum Count below the default value of 10.

Issue Links

• links to: GitHub Pull Request #7005