coordinator.xml

<coordinator-app name="MY_APP" frequency="${coord:months(1)}" start="${jobStart}" end="${jobEnd}" timezone="UTC" xmlns="uri:oozie:coordinator:0.3">
    <datasets>
      <dataset name="input1" frequency="${coord:months(1)}" initial-instance="${initialInstance}" timezone="UTC">
         <uri-template>hcat://headnode0:9083/default/samplelog/dt=${YEAR}-${MONTH}</uri-template>
      </dataset>
   </datasets>
   <input-events>
      <data-in name="coordInput1" dataset="input1">
          <instance>${coord:current(1)}</instance>
      </data-in>
   </input-events>
   <action>
      <workflow>
         <app-path>${appPath}</app-path>
         <configuration>
            <property>
              <name>DROPDT</name>
              <value>${coord:dateOffset(coord:nominalTime(), -3, 'MONTH')}</value>
            </property>
         </configuration>      
       </workflow>
   </action>     
</coordinator-app>