Type unsupported: string error with Schema.java:704

[tazan007]

Hi guys, I am getting this error with the following schema:

{"namespace": "rpc.test",
 "protocol": "ds_rpc",

"types": [
     {"name": "RequestID", "type": "string"},
     {"name": "ClientID", "type": "string"}
 ],

 "messages": {

     "helo": {
         "request": [{"name": "helo", "type": "ClientID"}],
         "response": "RequestID"
     }
 }

}

throws this error:

Caused by: org.apache.avro.SchemaParseException: Type not yet supported:
string
    at org.apache.avro.Schema.parse(Schema.java:704)
    at org.apache.avro.Protocol.parseTypes(Protocol.java:279)
    at org.apache.avro.Protocol.parse(Protocol.java:253)
    at org.apache.avro.Protocol.parse(Protocol.java:243)
    at org.apache.avro.Protocol.parse(Protocol.java:227)

If I change the types to the following, it fixes the error:

{"namespace": "rpc.test",
 "protocol": "ds_rpc",

"types": [
*     {"name": "RequestID", "type":"record", "fields" : [
                        {"name":"id","type": "string"}]},
     {"name": "ClientID", "type":"record", "fields" : [
                        {"name":"id","type": "string"}]}*
 ],

 "messages": {

     "helo": {
         "request": [{"name": "helo", "type": "ClientID"}],
         "response": "RequestID"
     }
 }

}


Is this expeceted behavior?  Do the types have to be complex if they are
named types?

Thanks,
Hiral