[KAFKA-6371] FetchMetadata creates unneeded Strings on instantiation

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.10.0.1, 0.10.1.1, 0.10.2.1
• Fix Version/s: 0.10.2.2
• Assignee: Maytee Chinavanichkit
• Reporter: Maytee Chinavanichkit
• Created: 15/Dec/17 09:30
• Updated: 24/Feb/18 21:32
• Resolved: 24/Feb/18 21:32

Description

My colleague and I were taking a heap dump to investigate the memory usage of a broker. From the dump, we saw a number of object strings with the message onlyCommitted: <redacted> and partitionStatus: <redacted>]. Upon investigation, these objects were being instantiated when the FetchMetadata object is constructed. The toString method here is malformed and the last two lines are executed as a block instead of being concatenated.

Issue Links

• links to: GitHub Pull Request #4328
• links to: GitHub Pull Request #4328