Query works in Test mode but fails with transient failure

Question

Hi,
I have a query that works well while testing with input json data. However, when the job is started the query fails with transient failure.
I have two eventhub input sources input1 and input2. I also have a reference data source in a blob, ref.
The query is 
WITH nameone AS(
SELECT ref.field1 as field1,ref.field2 as field2,MIN(input1.datetimestamp) AS datetimestamp,avg(input1.value) as value FROM input1 TIMESTAMP BY datetimestamp JOIN ref ON ref.field1 = input1.field1 GROUP BY ref.field1,tumblingwindow(second,30)
), nametwo AS(
SELECT ref.field1 as field1,ref.field2 as field2,MIN(input2.datetimestamp) AS datetimestamp,avg(input2.value) as value FROM input2 TIMESTAMP BY datetimestamp JOIN ref ON ref.field1 = input2.field1 GROUP BY ref.field1,tumblingwindow(second,30)
SELECT field1, field2,datetimestamp,value from nameone
UNION
SELECT field1, field2,datetimestamp,value from nametwo
Thanks

Answer 1

I solved the problem. 
The issue was in conversion of incoming data to write into an SQL db.
Query failed to convert 
 System.Int64 (incoming data format) to  System.Double ( SQL column data format)
I solved it by changing SQL column format to int, but I think this casting should be done automatically by the query. I can also CAST the data I guess but sometimes using CAST on everything is kind of a pain.
Another issue I faced was the failure messages. I checked the logs for last 12 hours. Sometimes the failure will point to the Writing Error (conversion of int to double) but sometimes the failure will simply be transient failure. So it was difficult to pinpoint
the error exactly.
Thanks anyways.