[KAFKA-3510] OffsetIndex thread safety

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.10.0.0
• Assignee: Ismael Juma
• Reporter: Ismael Juma
• Reviewer: Guozhang Wang
• Created: 05/Apr/16 09:07
• Updated: 05/Apr/16 18:46
• Resolved: 05/Apr/16 18:46

Description

We expose non-volatile variables without a lock and outside the class. We also use an `AtomicInteger` unnecessarily since it's always modified within a lock.