Maybe use register variables; something like:
- name: test user home dir in HDFS
shell: hadoop fs -test -d /user/{{ item.name }}
register: hadoop_dir
- name: create user home dir in HDFS
shell: hadoop fs -mkdir /user/{{ item.name }}
when: hadoop_dir|failed
- name: chown user home dir in HDFS
hadoop fs -chown {{ item.name }} /user/{{ item.name }})
when: hadoop_dir|failed
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