SET NOCOUNTON causing Primary key violation exception from client code

Question

Hi,
We have a stored procedure in SQL Server - 2012 which contains two insert statements as below      
BEGIN   
SET NOCOUNT ON;        
 if(@Status ='1')      
  Begin      
 insert into dcmnt_mstr       
  (trn_id,sub_no,usr_id,ref_id,email_id,reg_no,ordrd_date,ordr_cust_ref,email_status,chrg_status,upd_user,row_created_by)      
  values(@TranId,@SubsriberNo,@UserId,@RefId,@EmailId,'00000000',getdate(),@RefText,'0','0','Bulk Order',@AppId)      
  end      
 insert into dcmnt_bulk       
(trn_id,reg_no,pkg_type,proc_status,upd_user)      
values       
(@TranId,@RegNo,@PkgType,'0','Bulk Order')      
END 
By using the SSMS2012 query analyzer we are able execute this SP successfully.
But when this is executed from client code[Java Code] we are getting an error like below
com.jnetdirect.jsql.x: Violation of PRIMARY KEY constraint 'PK_dcmnt_mstr'. 
Cannot insert duplicate key in object 'dbo.dcmnt_mstr'. The duplicate key value is (5421e73993b46c15).
The same is working fine from the client code once the statement SET NOCOUNT ON; is removed from the SP.
Could some one can help to identify the root cause?
Thank you

Answer 1

It looks like the application code is examining the row count returned and retrying the insert if less than 1.  So you need to either specify SET NOCOUNT OFF (the default) or change the app code.
Dan Guzman, SQL Server MVP, http://www.dbdelta.com