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Jukka ZittingDec 15, 2010 10:32 am 
Subject:[ANNOUNCE] Apache Jackrabbit 2.2.0 released
From:Jukka Zitting (
Date:Dec 15, 2010 10:32:22 am

The Apache Jackrabbit community is pleased to announce the release of Apache Jackrabbit 2.2.0. The release is available for download at:

See the full release notes below for details about this release.

Release Notes -- Apache Jackrabbit -- Version 2.2.0



This is Apache Jackrabbit(TM) 2.2, a fully compliant implementation of the Content Repository for Java(TM) Technology API, version 2.0 (JCR 2.0) as specified in the Java Specification Request 283 (JSR 283).

Changes in this release


Jackrabbit 2.2 is an incremental feature release based on the earlier 2.x releases. The most notable changes in this release are:

* Performance improvements. The performance of features like access control, user and group management, concurrent read/write operations and join queries have been notably improved. A performance test suite was added to track improvements and prevent regressions.

* Deprecation of old persistence managers. All non-bundle persistence managers and also non-pooled bundle database persistence managers have been deprecated in preparation for potential future changes of the persistence layer. All the deprecated persistence managers will remain functional and supported in future 2.x releases, but will most likely be removed in Jackrabbit 3.0.

* Better thread-safety. Significant effort has been spent on making Jackrabbit more resilient against various kinds of concurrency issues. Most notably Jackrabbit no longer assumes that clients will follow the JCR specification in not using a single session concurrently from multiple threads. Doing so is still not recommended, but it's no longer likely to cause significant trouble.

* Switch from log4j to Logback. The default Jackrabbit deployment packages (jar, war, rar) now use Logback instead of log4j for improved logging functionality. Thanks to the SLF4J logging framework it is still easy for downstream deployments to switch to another logging backend for example if support for existing configurations is needed.

* Over 150 other fixes and improvements.

For more detailed information about all the changes in this and other Jackrabbit releases, please see the Jackrabbit issue tracker at

Release Contents


This release consists of a single source archive packaged as a zip file. The archive can be unpacked with the jar tool from your JDK installation. See the README.txt file for instructions on how to build this release.

The source archive is accompanied by SHA1 and MD5 checksums and a PGP signature that you can use to verify the authenticity of your download. The public key used for the PGP signature can be found at

About Apache Jackrabbit


Apache Jackrabbit is a fully conforming implementation of the Content Repository for Java Technology API (JCR). A content repository is a hierarchical content store with support for structured and unstructured content, full text search, versioning, transactions, observation, and more.

For more information, visit

About The Apache Software Foundation


Established in 1999, The Apache Software Foundation provides organizational, legal, and financial support for more than 100 freely-available, collaboratively-developed Open Source projects. The pragmatic Apache License enables individual and commercial users to easily deploy Apache software; the Foundation's intellectual property framework limits the legal exposure of its 2,500+ contributors.

For more information, visit