+1 (non binding) tested on secure and non secure clusters and no regressions were found.

On Feb 14, 2012, at 2:29 PM, Matt Foley wrote:

Hi all,
Hadoop-1.0.1-rc1 is now available at
Please download it, test it, and vote on whether to accept it as Release
Voting will close at 2:30pm PST on Tuesday 21 February.

Thank you,
--Matt (Release Manager)

This is a maintenance release from 1.0.0, but a number of
production-relevant bug fixes were requested for inclusion in the last week
or so.  The complete release notes are available at

The summary list is:

  - HADOOP-8009 <https://issues.apache.org/jira/browse/HADOOP-8009>.
  Create hadoop-client and hadoop-minicluster artifacts for downstream
  - HADOOP-8037 <https://issues.apache.org/jira/browse/HADOOP-8037>. Binary
  tarball does not preserve platform info for native builds, and RPMs fail to
  provide needed symlinks for libhadoop.so
  - MAPREDUCE-3184
<https://issues.apache.org/jira/browse/MAPREDUCE-3184>. Improve
  handling of fetch failures when a tasktracker is not responding on HTTP
  - HADOOP-7470 <https://issues.apache.org/jira/browse/HADOOP-7470>. move
  up to Jackson 1.8.8
  - HADOOP-7960 <https://issues.apache.org/jira/browse/HADOOP-7960>. Port
  HADOOP-5203 to branch-1, build version comparison is too restrictive
  - HADOOP-7964 <https://issues.apache.org/jira/browse/HADOOP-7964>. Deadlock
  in class init.
  - HADOOP-7987 <https://issues.apache.org/jira/browse/HADOOP-7987>. Support
  setting the run-as user in unsecure mode
  - HADOOP-7988 <https://issues.apache.org/jira/browse/HADOOP-7988>. Upper
  case in hostname part of the principals doesn't work with kerberos.
  - HADOOP-8010 <https://issues.apache.org/jira/browse/HADOOP-8010>.
  spews error message when HADOOP_HOME_WARN_SUPPRESS is set to true and
  HADOOP_HOME is present
  - HADOOP-8052 <https://issues.apache.org/jira/browse/HADOOP-8052>. Hadoop
  Metrics2 should emit Float.MAX_VALUE (instead of Double.MAX_VALUE) to avoid
  making Ganglia's gmetad core
  - HDFS-2379 <https://issues.apache.org/jira/browse/HDFS-2379>. 0.20:
  Allow block reports to proceed without holding FSDataset lock
  - HDFS-2814 <https://issues.apache.org/jira/browse/HDFS-2814>.
  does not account for svn revision in the version information
  - MAPREDUCE-3343
<https://issues.apache.org/jira/browse/MAPREDUCE-3343>. TaskTracker
  Out of Memory because of distributed cache
  - MAPREDUCE-3607
<https://issues.apache.org/jira/browse/MAPREDUCE-3607>. Port
  missing new API mapreduce lib classes to 1.x

Hortonworks, Inc.
email: arpit@hortonworks.com