We are happy to officially announce the general availability of CDH3 update 4. This update consists primarily of reliability enhancements as well as a number of minor improvements.
First, there have been a few notable HBase updates. In this release, we’ve upgraded Apache HBase to upstream version 0.90.6, improving system robustness and availability. Also, some of the recent hbck changes were incorporated to better detect and handle various types of corruptions. Lastly, HDFS append support is now disabled by default in this release as it is no longer needed for HBase. Please see the CDH3 Known Issues and Workarounds page for details.
In addition to the HBase updates, CDH3 update 4 also includes the latest release of Apache Flume (incubating) – version 1.1.0. A detailed description of what it brings to the table is found in a previous Cloudera blog post describing its architecture. Please note that we will continue to ship Flume 0.9.4 as well.
More information about how to download or upgrade to CDH3 update 4 can be found in the CDH packaging information webpage. The patches and JIRAs for update 4 are described in the changes files that can be found in the CDH3 downloads area. Additional details are available in the CDH3 release notes.
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