Releases Archive

release 0.22.0 available

2011 Dec 10

This release contains many bug fixes and optimizations compared to its predecessor 0.21.0. See the Hadoop 0.22.0 Release Notes for details. Alternatively, you can look at the complete change log for this release

Notes:

The following features are not supported in Hadoop 0.22.0.

• Security.
• Latest optimizations of the MapReduce framework introduced in the Hadoop 0.20.security line of releases.
• Disk-fail-in-place.
• JMX-based metrics v2.

Hadoop 0.22.0 features

• HBase support with hflush and hsync.
• New implementation of file append.
• Symbolic links.
• BackupNode and CheckpointNode.
• Hierarchical job queues.
• Job limits per queue/pool.
• Dynamically stop/start job queues.
• Andvances in new mapreduce API: Input/Output formats, ChainMapper/Reducer.
• TaskTracker blacklisting.
• DistributedCache sharing.

release 0.23.0 available

2011 Nov 11

This is the alpha version of the hadoop-0.23 major release. This is the first release we’ve made off Apache Hadoop trunk in a long while. This release is alpha-quality and not yet ready for serious use.

hadoop-0.23 contains several major advances:

• HDFS Federation
• NextGen MapReduce (YARN)

It also has several major performance improvements to both HDFS and MapReduce.

See the Hadoop 0.23.0 Release Notes for details.

release 0.20.205.0 available

2011 Oct 17

This release contains improvements, new features, bug fixes and optimizations. This release includes rpms and debs, all duly checksummed and securely signed.

See the Hadoop 0.20.205.0 Release Notes for details. Alternatively, you can look at the complete change log for this release.

Notes:

• This release includes a merge of append/hsynch/hflush capabilities from 0.20-append branch, to support HBase in secure mode.
• This release includes the new webhdfs file system, but webhdfs write calls currently fail in secure mode.

release 0.20.204.0 available

2011 Sep 5

This release contains improvements, new features, bug fixes and optimizations. This release includes rpms and debs for the first time.

See the Hadoop 0.20.204.0 Release Notes for details. Alternatively, you can look at the complete change log for this release.

Notes:

• The RPMs don’t work with security turned on. (HADOOP-7599)
• The NameNode’s edit log needs to be merged into the image via
• put the NameNode into safe mode
• run dfsadmin savenamespace command
• perform a normal upgrade

release 0.20.203.0 available

2011 May 11

This release contains many improvements, new features, bug fixes and optimizations. It is stable and has been deployed in large (4,500 machine) production clusters.

See the Hadoop 0.20.203.0 Release Notes for details. Alternatively, you can look at the complete change log for this release or the Jira issue log for all releases.

release 0.21.0 available

2010 Aug 23

This release contains many improvements, new features, bug fixes and optimizations. It has not undergone testing at scale and should not be considered stable or suitable for production. This release is being classified as a minor release, which means that it should be API compatible with 0.20.2.

See the Hadoop 0.21.0 Release Notes for details. Alternatively, you can look at the complete change log for this release or the Jira issue log for all releases.

release 0.20.2 available

2010 Feb 26

This release contains several critical bug fixes.

See the Hadoop 0.20.2 Release Notes for details. Alternatively, you can look at the complete change log for this release or the Jira issue log for all releases.

release 0.20.1 available

2009 Sep 14

This release contains several critical bug fixes.

See the Hadoop 0.20.1 Release Notes for details. Alternatively, you can look at the complete change log for this release or the Jira issue log for all releases.

release 0.19.2 available

2009 Jul 23

This release contains several critical bug fixes.

See the Hadoop 0.19.2 Release Notes for details. Alternatively, you can look at the complete change log for this release or the Jira issue log for all releases.

release 0.20.0 available

2009 Apr 22

This release contains many improvements, new features, bug fixes and optimizations.

See the Hadoop 0.20.0 Release Notes for details. Alternatively, you can look at the complete change log for this release or the Jira issue log for all releases.