The Apache Commons Pool team is pleased to announce the release of Apache Commons Pool 2.5.0. Apache Commons Pool provides an object-pooling API and a number of object pool implementations. Version 2 contains a completely re-written pooling implementation compared to the 1.x series. In addition to performance and scalability improvements, version 2 includes robust instance tracking and pool monitoring. Version 2 requires JDK level 1.6 or above. No client code changes are required to migrate from versions 2.4.x to version 2.5.0. Users of version 1.x should consult the migration guide on the Commons Pool web site. NOTE: The MBean interfaces (DefaultPooledObjectInfoMBean, GenericKeyedObjectPoolMXBean and GenericKeyedObjectPoolMXBean) exist only to define the attributes and methods that will be made available via JMX. They must not be implemented by clients as they are subject to change between major, minor and patch version releases of Commons Pool. Clients that implement any of these interfaces may not, therefore, be able to upgrade to a new minor or patch release without requiring code changes. Changes in version 2.5.0 include: New features: o POOL-332: ObjectPool and KeyedObject pool should extend Closeable. o POOL-335: Make abandoned logging stack trace requirements configurable. This also reverts the default behavior introduced by POOL-320. Changes: o POOL-331: Update from Java 6 to 7. o POOL-333: Update optional dependency asm-util from 5.2 to 6.0. o POOL-334: org.apache.commons.pool2.impl.ThrowableCallStack.Snapshot is missing serialVersionUID. For complete information on Apache Commons Pool, including instructions on how to submit bug reports, patches, or suggestions for improvement, see the Apache Apache Commons Pool website: http://commons.apache.org/proper/commons-pool/ Enjoy! Gary Gregory, on behalf of the Apache Commons Team