[MESOS-6461] Duplicate framework ids in /master/frameworks endpoint 'unregistered_frameworks'.

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.0.2, 1.1.0, 1.2.0
• Component/s: master
• Labels: master
• Sprint: Mesosphere Sprint 45
• Story Points: 2
• Assignee: Vinod Kone
• Reporter: Gilbert Song
• Created: 24/Oct/16 22:27
• Updated: 28/Oct/16 21:06
• Resolved: 28/Oct/16 20:53

Description

This issue was exposed from MESOS-6400. There are duplicate framework ids presented from the /master/frameworks endpoint due to:

https://github.com/apache/mesos/blob/master/src/master/http.cpp#L1338

We should use a `set` or a `hashset` instead of an array, to avoid duplicate ids.