[AMQ-7017] ProducerBrokerExchange.getPercentageBlocked() throws ArithmeticException (divide by zero)

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 5.15.4
• Fix Version/s: 5.15.5, 5.16.0
• Component/s: Broker
• Labels: patch
• Patch Info: Patch Available
• Flags: Patch
• Assignee: Christopher L. Shannon
• Reporter: Matthew Stratton
• Created: 21/Jul/18 17:52
• Updated: 27/Jul/18 11:41
• Resolved: 27/Jul/18 11:41

Description

I found this when testing a broker plugin for tracking messages sent (including some stats like getPercentageBlocked). When there have been no blocked messages an ArithmeticException is thrown due to an unchecked divide by zero. 

I fixed it and added a couple unit tests.