Use Deque for ThreadActionData ------------------------------ Key: JBTM-2209 URL: https://issues.jboss.org/browse/JBTM-2209 Project: JBoss Transaction Manager Issue Type: Sub-task Components: Transaction Core Reporter: Jesper Pedersen Assignee: Michael Musgrove Fix For: 5.0.4 Attachments: Test.java Note, there are other usages of java.util.Stack in the code base that could be changed as well