How to run only one task in ansible playbook?

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Is there a way to only run one task in ansible playbook?

For example, in roles/hadoop_primary/tasks/hadoop_master.yml. I have "start hadoop job tracker services" task. Can I just run that one task?

hadoop_master.yml file:

# Playbook for  Hadoop master servers

- name: Install the namenode and jobtracker packages
  apt: name={{item}} force=yes state=latest
  with_items: 
   - hadoop-0.20-mapreduce-jobtracker
   - hadoop-hdfs-namenode
   - hadoop-doc
   - hue-plugins

- name: start hadoop jobtracker services
  service: name=hadoop-0.20-mapreduce-jobtracker state=started
  tags:
   debug

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