[CBAS] AsterixDB Compilation Params : Issues with some values for compiler.joinmemory

Build : 542

Case 1 : The error in case where compiler.joinmemory is set to 100KB is -

2017-03-03 15:52:47,105] - [rest_client:803] ERROR - http://10.111.151.102:8095/analytics/service error 500 reason: unknown {
"requestID": "36d5855f-98f2-4e56-b13c-6adc4e088df2",
"signature": "*",
"errors": [

{ "code": "1", "msg": "Not enough memory is assigend for Hybrid Hash Join." }

],
"status": "fatal",
"metrics":

{ "elapsedTime": "17.326442ms", "executionTime": "17.194785ms", "resultCount": 0, "resultSize": 0 }

}

If there is a minimum value required by the parameter, that should be documented. 100KB works fine for groupmemory and sortmemory

Case 2 : compiler.joinmemory = -10MB
Error = 2017-03-03 15:52:47,105] - [rest_client:803] ERROR - http://10.111.151.102:8095/analytics/service error 500 reason: unknown {
"requestID": "36d5855f-98f2-4e56-b13c-6adc4e088df2",
"signature": "*",
"errors": [

{ "code": "1", "msg": "Not enough memory is assigend for Hybrid Hash Join." }

],
"status": "fatal",
"metrics":

{ "elapsedTime": "17.326442ms", "executionTime": "17.194785ms", "resultCount": 0, "resultSize": 0 }

}

The error should be handled differently in case of negative values.