[KAFKA-2973] Fix leak of child sensors on remove

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0.0
• Fix Version/s: 0.9.0.1, 0.10.0.0
• Component/s: clients
• Assignee: Ismael Juma
• Reporter: Ismael Juma
• Reviewer: Gwen Shapira
• Created: 09/Dec/15 17:11
• Updated: 09/Dec/15 17:54
• Resolved: 09/Dec/15 17:52

Description

We added the ability to remove sensors from Kafka Metrics in 0.9.0.0. There is, however, a bug in how we populate the `childrenSensors` map causing us to leak some child sensors (all, but the last one added).