[STORM-1756] Storm-kafka tests leak resources due to retained references to KafkaServer

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0, 1.0.1, 1.1.0
• Component/s: storm-kafka
• Epic Link: Release Apache Storm 1.0.2
• Assignee: Stig Rohde Døssing
• Reporter: Stig Rohde Døssing
• Created: 02/May/16 12:50
• Updated: 20/May/16 17:22
• Resolved: 16/May/16 09:04

Description

Since JUnit keeps a reference to each test class until all tests for a module have run, the KafkaTestBroker fields are not eligible for garbage collection until all tests have run. KafkaTestBroker keeps a reference to KafkaServerStartable/KafkaServer, which allocates resources that are also not eligible for collection. This very quickly causes surefire to run out of memory if this class is used more than a few places.