[QPID-7744] [Java Broker] Fix NPE in AbstractVirtualHost$MessageHeaderImpl when there is no user principal

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: qpid-java-broker-7.0.0
• Component/s: Broker-J
• Assignee: Unassigned
• Reporter: Lorenz Quack
• Created: 13/Apr/17 15:05
• Updated: 14/Nov/17 22:01
• Resolved: 19/Apr/17 08:19

Description

Currently, the broker produces a NullPointerException when MessageHeaderImpl are instantiated while the subject does not have a UserPrincipal.
While this scenario should not occur outside of testing it is better to guard against NPEs.