AtomicHashMap.put is not atomic with pessimistic locking -------------------------------------------------------- Key: ISPN-3124 URL: https://issues.jboss.org/browse/ISPN-3124 Project: Infinispan Issue Type: Bug Components: Core API Affects Versions: 5.3.0.Beta1 Reporter: Dan Berindei Assignee: Dan Berindei Fix For: 5.3.0.CR2, 5.3.0.Final When the user calls {{AtomicHashMap.put(k, v)}}, {{AtomicHashMapProxy.getDeltaMapForWrite()}} first reads the atomic map in the invocation context, and only acquires a lock afterwards. Between the read and the lock, another transaction can write something to the atomic map, and that write will be lost.