[YARN-6544] Add Null check RegistryDNS service while parsing registry records

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: yarn-native-services
• Fix Version/s: yarn-native-services
• Component/s: yarn-native-services
• Assignee: Karam Singh
• Reporter: Karam Singh
• Created: 02/May/17 14:35
• Updated: 06/Nov/17 22:33
• Resolved: 12/May/17 22:06

Description

Add Null check RegistryDNS service while parsing registry records for Yarn persistance attribute.
As of now It assumes that yarn registry record always contain yarn persistance which is not the case