Custom Partitioner not working in Oozie Mapreduce action

I implemented secondary sort in mapreduce using old API (org.apache.hadoop.mapred.*) and trying to execute it using Oozie (From Hue).
Though I have set the partitioner class in the properties, the partitioner is not being executed. So, I'm not getting output as expected.
The same code runs fine when run using hadoop command from CLI.
And here is my workflow.xml
<workflow-app name="MyTriplets" xmlns="uri:oozie:workflow:0.5">
<start to="mapreduce-598d"/>
<kill name="Kill">
<message>Action failed, error message[$

]</message>
</kill>
<action name="mapreduce-598d">
<map-reduce>
<job-tracker>$

</job-tracker>
<name-node>$

</name-node>
<configuration>
<property>
<name>mapred.output.dir</name>
<value>/test_1109_3</value>
</property>
<property>
<name>mapred.input.dir</name>
<value>/apps/hive/warehouse/7360_0609_rx/day=06-09-2017/hour=13/quarter=2/,/apps/hive/warehouse/7360_0609_tx/day=06-09-2017/hour=13/quarter=2/,/apps/hive/warehouse/7360_0509_util/day=05-09-2017/hour=16/quarter=1/</value>
</property>
<property>
<name>mapred.input.format.class</name>
<value>org.apache.hadoop.hive.ql.io.RCFileInputFormat</value>
</property>
<property>
<name>mapred.mapper.class</name>
<value>PonRankMapper</value>
</property>
<property>
<name>mapred.reducer.class</name>
<value>PonRankReducer</value>
</property>
<property>
<name>mapred.output.value.comparator.class</name>
<value>PonRankGroupingComparator</value>
</property>
<property>
<name>mapred.mapoutput.key.class</name>
<value>PonRankPair</value>
</property>
<property>
<name>mapred.mapoutput.value.class</name>
<value>org.apache.hadoop.io.Text</value>
</property>
<property>
<name>mapred.reduce.output.key.class</name>
<value>org.apache.hadoop.io.NullWritable</value>
</property>
<property>
<name>mapred.reduce.output.value.class</name>
<value>org.apache.hadoop.io.Text</value>
</property>
<property>
<name>mapred.reduce.tasks</name>
<value>1</value>
</property>
<property>
<name>mapred.partitioner.class</name>
<value>PonRankPartitioner</value>
</property>
<property>
<name>mapred.mapper.new-api</name>
<value>False</value>
</property>
</configuration>
</map-reduce>
<ok to="End"/>
<error to="Kill"/>
</action>
<end name="End"/>
When running using hadoop jar command, I set the partitioner class using JobConf.setPartitionerClass API.
Partitioner is not executed when using old API . Inspite of adding the property.
<property>
<name>mapred.partitioner.class</name>
<value>PonRankPartitioner</value>
</property>
Executed the same logic using new API's (org.apache.hadoop.mapreduce) and added mapreduce.partitioner.class property in workflow.
Partitioner was executed and desired outcome was seen.