[NIFI-5378] NiFiProperties: Add check to validation to prevent startup when duplicate keys are encountered

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.7.0, 1.16.1
• Fix Version/s: 1.17.0
• Component/s: Configuration
• Assignee: Mark Bean
• Reporter: Jon Kessler
• Created: 05/Jul/18 15:26
• Updated: 14/Jun/22 16:36
• Resolved: 14/Jun/22 16:36

Description

Currently duplicate keys can exist in the nifi.properties file and you aren't necessarily guaranteed or sure which value will be used when the system starts. There is already a method in NiFiProperties.java for validation at startup. Logic should be added so that when duplicates are encountered the system is not permitted to start. Also include a good log message to say what the duplicates are and what the issue was.

Issue Links

• links to: GitHub Pull Request #6061