Had the same problem recently. BTW it's the same for common and HDFS.
I ended up adding contributors via jira CLI. Worked well.
I guess it's the web UI limitation.
Thought this may be useful for others.

On Fri, Feb 14, 2014 at 11:30 AM, Jakob Homan <[EMAIL PROTECTED]> wrote:
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB