Unable to create partitions dynamically using Hcatalog in a Map/Reduce program

I am trying to insert into a partitioned table using Hcataclog.
followed approach
Sets the list of dynamic partitioning keys used for outputting without specifying all the keys
Parameters:
dynamicPartitioningKeys

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public void setDynamicPartitioningKeys(List<String> dynamicPartitioningKeys)

{ 266 this.dynamicPartitioningKeys = dynamicPartitioningKeys; 267 }

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public List<String> getDynamicPartitioningKeys()

{ 270 return this.dynamicPartitioningKeys; 271 }

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It is not behaving as expected.Data is not inserted into paritions dynamically.