Balu Vellanki created FALCON-1342:
-------------------------------------

             Summary: Do not allow duplicate properties in cluster entities
                 Key: FALCON-1342
                 URL: https://issues.apache.org/jira/browse/FALCON-1342
             Project: Falcon
          Issue Type: Sub-task
          Components: general
            Reporter: Balu Vellanki
            Assignee: Balu Vellanki
             Fix For: 0.7


When specifying properties for a cluster, this is currently allowed,

{code}
<properties>
        <property name="test" value="value1"/>
        <property name="test" value="value2"/>
</properties>
{code}

The propeties are stored as an array of 
org.apache.falcon.entity.v0.cluster.Property, and cluster.getProperty("test") 
will return either "value1" or "value2" but not both. If falcon does not 
support multiple values for same property key,  parsing such an entity should 
throw an error. 



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