I'm trying to add lzo support to my configuration files using the cloudera manager (CDH5b2).
If I add the io.compression.codecs to the service-wide hdfs configuration, and deploy the configuration file, /etc/hadoop/conf.cloudera.hdfs/core-site.xml now contains the new value.
However, /etc/hadoop/conf.cloudera.yarn/core-site.xml has a higher priority (update-alternatives --display hadoop-conf), the hdfs core-site.xml values are not used when I start a MR job.
Obviously, I can simply modify the yarn core-site.xml file manually, but I don't understand how to do deploy the hdfs core-site.xml file properly using cloudera manager.
There is a MapReduce Client Environment Safety Valve, also known as 'MapReduce Service Advanced Configuration Snippet (Safety Valve) for core-site.xml' found in the gui under mapreduce's configuration ->Service-Wide->Advanced will allow you to add any value that doesn't fit elsewhere. (There is also one for core-site.xml as well.)
Having said that, details can be found on Cloudera's site at: http://www.cloudera.com/content/cloudera/en/documentation/core/latest/topics/cdh_ig_cdh5_install.html