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From "Greg Phillips (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-11288) Avro SerDe InstanceCache returns incorrect schema
Date Fri, 17 Jul 2015 12:38:04 GMT
Greg Phillips created HIVE-11288:
------------------------------------

             Summary: Avro SerDe InstanceCache returns incorrect schema
                 Key: HIVE-11288
                 URL: https://issues.apache.org/jira/browse/HIVE-11288
             Project: Hive
          Issue Type: Bug
            Reporter: Greg Phillips


To reproduce this error, take two fields in an avro schema document matching the following:
"type" :  { "type": "array", "items": [ "null",  { "type": "map", "values": [ "null", "string"
] } ]  }
"type" : { "type": "map", "values": [ "null" , { "type": "array", "items": [ "null" , "string"]
} ] }
After creating two tables in hive with these schemas, the describe statement on each of them
will only return the schema for the first one loaded.  This is due to a hashCode() collision
in the InstanceCache.  

A patch will be included in this ticket shortly which removes the hashCode call from the InstanceCache's
internal HashMap, and instead provides the entire schema object.



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