LAM-49 Changed in apache-hadoop role's tasks for init scripts to work properly.

ansible/roles/apache-hadoop/tasks/master.yml

@@ -6,12 +6,12 @@
     template: src=yarn-init.j2 dest=/etc/init.d/yarn-init owner=hduser group=lambda mode=0740
 
   - name: Format Apache HDFS.
-    shell: "yes | {{ installation_path }}/hadoop/bin/hadoop namenode -format"
+    shell: su - hduser -c "yes | {{ installation_path }}/hadoop/bin/hadoop namenode -format"
     tags:
       - format-hdfs
 
   - name: Start Apache HDFS.
-    shell: /etc/init.d/hdfs-init start # Should use Ansible module "service: name=hdfs-init state=started" when the bug in version 1.9.1 is fixed.
+    shell: su - hduser -c "/etc/init.d/hdfs-init start > /dev/null &"
     tags:
       - start-hdfs
 
@@ -21,7 +21,7 @@
       - start-hdfs
 
   - name: Start Apache Yarn.
-    shell: /etc/init.d/yarn-init start # Should use Ansible module "service: name=yarn-init state=started" when the bug in version 1.9.1 is fixed.
+    shell: su - hduser -c "/etc/init.d/yarn-init start > /dev/null &"
     tags:
       - start-yarn
 

ansible/roles/apache-hadoop/tasks/setup.yml

@@ -9,7 +9,7 @@
     file: src="{{ installation_path }}/hadoop-{{ version }}" dest="{{ installation_path }}/hadoop" state=link
 
   - name: Set JAVA_HOME in Apache Hadoop environment.
-    lineinfile: dest="{{ installation_path }}/hadoop/etc/hadoop/hadoop-env.sh" regexp="^export JAVA_HOME=" line="export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64"
+    lineinfile: dest="{{ installation_path }}/hadoop/etc/hadoop/hadoop-env.sh" regexp="^export JAVA_HOME=" line="export JAVA_HOME=/usr"
 
   - name: Configure slaves.
     template: src=slaves.j2 dest="{{ installation_path }}/hadoop/etc/hadoop/slaves" owner=hduser group=lambda mode=0644