[CASSANDRA-13754] BTree.Builder memory leak

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 3.11.1
• Component/s: Legacy/Core

Environment

Cassandra 3.11.0, Netty 4.0.44.Final, OpenJDK 8u141-b15

• Severity: Normal
• Assignee: Robert Stupp
• Reporter: Eric Evans

Authors

Robert Stupp

Reviewers

Jeremiah Jordan

• Created: 10/Aug/17 16:15
• Updated: 16/Apr/19 09:30
• Resolved: 13/Sep/17 17:05

Description

After a chronic bout of OutOfMemoryError in our development environment, a heap analysis is showing that more than 10G of our 12G heaps are consumed by the threadLocals members (instances of java.lang.ThreadLocalMap) of various io.netty.util.concurrent.FastThreadLocalThread instances. Reverting cecbe17 fixes the issue.