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Service Broker freezes almost every night.

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Hellow!

 

I have got a main SQL Server with a database and many other SQL servers (~ 1500). From morning till evening it’s ok, but in the night Service Broker freezes. In this case sys.transmission_queue

has many rows where transmission_status is empty. In the night 90% of SQL Servers are turned off.

Why so?

Thank you very much.

Main server: Microsoft SQL Server 2012 (SP1) - 11.0.3368.0 (X64) 

Others:

Microsoft SQL Server 2008 (SP2) - 10.0.4000.0 (X64)    or

Microsoft SQL Server 2012 (SP1) - 11.0.3000.0 (Intel X86) 



The Service Broker endpoint is in disabled or stopped state.

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We are getting the following error message continuously in SQL Server error log.

"The Service Broker endpoint is in disabled or stopped state."

We have Always on Feature enabled on the SQL Server 2012 instance with version(11.00.2100).

any idea what could cause these messages to be logged in SQL Server error log. Will there be any issue in future because of this?

Thanks in advance.

Regards,

Gayaz

Use sql notification for console application C#

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I have developed ucma C# console application which sends IM  to users. 

Now I want to send IM if any new entry is added in the table 

So i want to use query notification .

I have enabled service broker on my database .

And I have added code for sqldepedency  in my code file.

as follows.

 public static void Main(string[] args)
    {
      UCMASampleInstantMessagingCall ucmaSampleInstantMessagingCall =
                                    new UCMASampleInstantMessagingCall();
      ucmaSampleInstantMessagingCall.connectionfunction();
}

public void connectionfunction()
string connectionString = @"Data Source=PIXEL-IHANNAH2\PPINSTANCE;User ID=sqlPPUser;Password=ppuser1;Initial Catalog=Ian;";



      SqlDependency.Stop(connectionString);







      SqlConnection sqlConnection = new SqlConnection(connectionString);string statement = "select * from dbo.tblTest";



      SqlCommand sqlCommand = new SqlCommand(statement, sqlConnection);// Create and bind the SqlDependency object to the command object.



      SqlDependency dependency = new SqlDependency(sqlCommand, null, 0);



      SqlDependency.Start(connectionString);







      dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);



    }



    



    privatevoid dependency_OnChange(object sender, SqlNotificationEventArgs e)



    {

ucmaSampleInstantMessagingCall.run()
}
private void Run() { // Initialize and startup the platform. Exception ex = null; try { // Create the UserEndpoint _helper = new UCMASampleHelper(); _userendpoint = _helper.CreateEstablishedUserEndpoint();

Now I want to run this application in the background , so f any new entry is added it will notify my C# application and call run function.
i tried above code but it was not working. 
Sample code is avaliableon net but it is for form application and we can see output if we run the form application .
so if i want to run my C# application what should I do?

Best Possible Approach : Service Broker or replication?

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I have a business scenario. I have an application whose DB resides on SQL Server A. My application resides on SQL server B. Both SQL servers are on the same network. Server A has a table that is being constantly updated via a web application. We want that table to be on Server B. At present it is updated nightly from Server A to Server B.

We want the changes to be replicated to server B in almost real time. 30 minutes delay could work.

Now considering this business case what would eb my best options:

1. Implement CDC on server A for the interested table ( Please note that CDC is only for 1 table, I'm not sure if this is possible) . Bring the table from Server A once to Server B using a Linked Server. Then use the CDC from server A to Merge and Update on table on Server b using a SP and Schedule this SP after 30 minutes.

OR

2. Use CDC and Service combination.

OR

3. use Replication.

OR  ...???

Any help will greatly be appreciated.

Troubleshooting performance issues with service broker

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We have an OLTP application that heavily uses service broker to perform many of the more common tasks.  One of our biggest (if not the biggest) clients we have is having an issue with service broker where it is constantly encountering deadlock errors because of the inordinate amount of work it is trying to do.  We're starting to look in to ways to better optimize use of service broker with our applicaiton.  We've considered raising the MAX_QUEUE_READERS setting for the queues that have the greatest number of messages (and most number of deadlocks) to mitigate the issue.  What are some other ways in which we could tweak service broker to boost performance?

Deadlock Event Notifications

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Hello,

I've setup an Event Notification to fire into a Service Broker queue whenever a deadlock occurs in any database on my server. I then created a stored procedure that would be activated by the queue to email an alert to me.

It's all working fine....but I am getting two emails for each deadlock when testing. I cannot work out why this is happening, I'll post the code below, could someone let me know what's going on please? Any help or advice would be most appreciated.

Andrew

--Create a service broker queue to hold the events
CREATE QUEUE [DeadlockQueue];
GO


--Create a service broker service receive the events
CREATE SERVICE [DeadlockService]
ON QUEUE [DeadlockQueue] ([http://schemas.microsoft.com/SQL/Notifications/PostEventNotification]);
GO


--Create the event notification for deadlock graphs on the service
CREATE EVENT NOTIFICATION [CaptureDeadlocks]
ON SERVER
WITH FAN_IN
FOR DEADLOCK_GRAPH
TO SERVICE N'DeadlockService', N'current database';
GO


--Create procedure to email alert
CREATE PROCEDURE [Alerting].[DeadlockNotification]
AS
EXEC [msdb].[dbo].sp_send_dbmail
@profile_name = 'DBA Mail Profile',
@recipients = 'Andrew@home.com',
@subject = 'A deadlock has occurred'
GO


--Alert Service Broker Queue to run stored procedure
ALTER QUEUE [dbo].[DeadlockQueue]
    WITH ACTIVATION
    ( STATUS = ON,
      PROCEDURE_NAME = [Alerting].[DeadlockNotification],
      MAX_QUEUE_READERS = 10,
      EXECUTE AS SELF
    );
GO



SQL error log filling rapidly

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We are running Sql server 2005. This server has been running for over a year without any problems. There are no custom databases or scripts (Operations manager, WSUS, ACS databases)

Recently the ERRORLOG has started filling rapidly with the error:

spid26s     An exception occurred while enqueueing a message in the target queue. Error: 15517, State: 1. Cannot execute as the database principal because the principal "dbo" does not exist, this type of principal cannot be impersonated, or you do not have permission.

This error is being posted several times a second.

All forums and web searches indicate that this occurs when a database is moved from one server to another and the SID of a user account changes, however we have not moved/imported/exported any databases or changed/added/deleted any users. Everything in that respect is still set the way it always has been.

The only clue I am getting is when I run an sp_who query and look for spid26 (or whatever is being reported at the time)

This shows:

spid 26   status: background    loginname: sa    dbname: master    cmd: BRKR Task

If I am reading this correctly, then I cannot understand why the sa account is failing to login to the master database for the Broker when everything else is working.

 

Any suggestions?

My knowledge of SQL is limited, so if there is any other info required, let me know.

 

Thanks

event notification conversations started

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documentation says that when you establish a event notification 'a number of conversations' will be started to the service...is there some why to estimate how many conversations are going to be started?

I have an instance (2012) that is starting almost 20 conversations to my srvc for tracking login/out/failure events. 

Does this seem tooooo high for conversation count?

Whereas I have another event notification database scoped (tracking ddl stuff) that only starts one thread to my service.

is it cause my first event notif is server scoped... that it is creating soooo many conversations?

any insights would be lovely.

cheers.

-mt


mike t.


SqlDependency causing delays to UPDATE statements

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I have a win forms application which uses SqlDependency to monitor an orders table for changes (ie when goods are shipped etc).  The SQL statement works fine but I am having trouble with other SQL statements wanting to update the orders table whilst the SqlDependency is monitoring the table.

Initially I thought it was down to the transaction containing the update statements but if I take just one simple update statement and run it in SQL Management Studio, I get the same delay between 10 and 20 seconds.  It appears to be the case for just this one table which is monitored, other tables which are included in the SqlDependency SQL statement through inner joins are updated fine (<1 second).

Anyone any ideas on what could cause this or where to start troubleshooting?

Also, this is in a production system and the table in question has circa 19k rows.  I don't see this problem in my dev system which has fewer rows.

Chris


Stored Procedure behaves differently when activation is on?!

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Hi,

I have got a simple stored procedure for testing purposes. When Activation is off and I run this sp myself it works correct, but when I set activation to on and send a message, the message is being pulled from the queue and I think this can only be done by the activated sp but the insert into (see sp) is not done.

here is stored procedure:

as

declare

@message_bodyasxml;


declare

@message_typeassysname;


declare

@dialogasuniqueidentifier;


 


while

(1=1)


begin


waitfor(


receivetop(1)


@message_type=message_type_name,


@message_body=cast(message_bodyasxml),


@dialog=conversation_handle


fromdbo.MADClaimCallHistoryQueue


),timeout2000;


 

if(@@ROWCOUNT=0)


begin


print'rowcount = 0'


break;


end


if(@message_type='http://schemas.microsoft.com/SQL/ServiceBroker/EndDialog')


endconversation@dialog;


elseif(@message_type='http://schemas.microsoft.com/SQL/ServiceBroker/Error')


begin

print'Dialog Error dialog #'+cast(@dialogasnvarchar(50));


endconversation@dialog;


end


elseif(@message_type='InsertMessage')


begin


print'insert';


insertintoMADLog.dbo.SBTest(xmlvar)


select@message_body


endconversation@dialog;


end

end

SQLDependency (C#) w/custom queue name isn't working

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Hello all,

I've written an application that uses the .Net SQLDependency class as directed in the docs. It works fine when I let the default behavior create the SB service/queue automatically as follows:

SqlDependency.Start(connectionString);

However when I give it a queue name in the constructor it doesn't receive any events:

SqlDependency.Start(connectionString, "SBQueueService");

I don't want SqlDependency to create the queue for me each time, as during development I end up with dozens of services/queues registered all with a default max queue readers of 1. My service broker SQL is:

ALTER PROCEDURE [dbo].[SBQueryProc] AS 
BEGIN 
	BEGIN TRANSACTION; 
	RECEIVE TOP(0) conversation_handle FROM [SBQueueService]; 
	COMMIT TRANSACTION; 
END;

CREATE QUEUE [dbo].[SBQueueService] WITH STATUS = ON , RETENTION = ON , ACTIVATION (  
STATUS = ON , PROCEDURE_NAME = [dbo].[SBQueryProc] , MAX_QUEUE_READERS = 16 , EXECUTE AS OWNER  ) ON [PRIMARY] 

CREATE SERVICE [SBQueueService] AUTHORIZATION sb ON QUEUE [dbo].[SBQueueService] ([http://schemas.microsoft.com/SQL/Notifications/PostQueryNotification]);
IF (SELECT COUNT(*) FROM sys.database_principals WHERE name='sql_dependency_subscriber' AND type='R') <> 0 
BEGIN 
	GRANT SEND ON SERVICE::[SBQueueService] TO sql_dependency_subscriber; 
END;  

Does anyone see any issue with how it's being setup? I've captured the SQL that the SqlDependency class sends and I seem to be doing the same thing, but I don't receive notification events.


Michael Brown, 360 Replays Ltd. (don't forget that 'Mark As Answer' button!)


help understanding usage of Service Broker

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Hello,

I am trying to learn/understand Service Broker and how it works and more importantly, what is the practical use of it?
Just like anything else, I googled on this and I kind of got very basic understanding on how to configure one(again, very basic) but what I could not comprehend in what Situations it is used??

Most of the videos/blogs, I referred say it is 'asynchoronizing messages systems that can send messages across sql sever databases ....' but what I do not understand like where is it required??
Does any body have good references that explain in what situations service broker is used?? Any help is appreciated.

In short, I would like learn about the practical usage of Service broker. Thank you


Hope it Helps!!

Problem with the principal ##MS_PolicyEventProcessingLogin##

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I'm trying to send broker messages beteween 2 sql instances on the same server.
I slready succeeded to send and retrieve messages last week. Now I changed the XML validation of the message type (dropping service, contract, message type, contract and recreating them). I'm using a stored procedure that receives the xml message as parameter to send the message. When I call it, I find this in the Profiler :

Broker:Activation
Cannot execute as the database principal because the principal "##MS_PolicyEventProcessingLogin##" does not exist, this type of principal cannot be impersonated, or you do not have permission.


I can see that principal in the sys.database_principals view of the master database (initiator server). But I can't find it on the initiator broker database. Is that normal ?
I also see this message in the profiler : This message could not be delivered because the security context could not be retrieved. But i think it is related to the first message.

Also, there is nothing in both initiator queue and target queue, nor in the sys.transmission_queue view.
Should I recreate the route ? Or the remote service binding ?

How could I solve this security issue ?
Mike

Service broker - conversation handle not found messages in SQL Server error log

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Many threads opened on this topic, none seem to have an answer for my problem so i am going to give it a try..

System : Windows Server 2012 SQL Server 2012 Enterprise edition

Problem : We are using SQLDependency to enable use of query notification in our application which means it creates its own service , queue and procedure.

Question 1: Looking in the stored procedure i see it does receive top 0. What does it mean to do top 0?

Now for the real problem.. Occasionally , the error log is filled with the following messages (to the point when i cant open it) : Query notification delivery could not send message on dialog 'X'.... because of the following error in service broker: 'The conversation handle X is not found. The messages appear with the same conversation_handle or 3 different the most.

when i query that conversation from sys.conversation_endpoints , i do see it and it is marked as is_system = 1 (STARTED_OUTBOUND).

I've added an alert on error 9245 to try and identify why it happens when it happens. In the message 'During the last time interval X query notification errors were suppressed' , the X is enormous and more than 10,000. i guess the number is related to retrials because we dont have such a number of notifications.

At first, i thought it might be related with the 'DialogTimer' message because i noticed that when i end the conversation of that specific message , the messages stop but recently it didnt work so the only think i could do to stop it is set NEW_BROKER.

it immediately happen when i do recycle to our application pool although i see in our logs it calls the SQLDependency.Stop , i dont see the objects (service,queue and procedure) dropped and the error messages start flooding the error log.

Please let me know if further details are required. Appreciate your help,

Thanks

Doron


DB

DML Statements audit

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Hi Experts,

how to audit DML statement through trace files.

Thanks

Shashikala


Shashikala


Service Broker: Procedure is not executed

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Hi there. I have some troubles with SB. I created stored procedure and the all SB part, however the message appears in the queue but the procedure is executed only sometimes. It executed the first time and executed after some times later. What is wrong?

The code I use.

CREATE PROCEDURE dbo.sb_test

AS
  select 'abrakadabra'
  DECLARE @h UNIQUEIDENTIFIER;
  DECLARE @messageTypeName SYSNAME;
  DECLARE @payload VARBINARY(MAX);
  WAITFOR(RECEIVE TOP(1)
    @h = conversation_handle,
    @messageTypeName = message_type_name,
    @payload = message_body
    FROM SBReceiveQueue), TIMEOUT 1000;

  INSERT INTO test(a) values(GETDATE());
GO

There is the code for SB part:

-- Create Message Type
CREATE MESSAGE TYPE SBMessage
VALIDATION = NONE
GO
-- Create Contract
CREATE CONTRACT SBContract
(SBMessage SENT BY INITIATOR)
GO
-- Create Send Queue
alter QUEUE SBSendQueue
    WITH STATUS=ON,
    ACTIVATION (
        PROCEDURE_NAME = dbo.sb_test,
        MAX_QUEUE_READERS = 1,
        EXECUTE AS SELF 
         ) ;

GO
-- Create Receive Queue
CREATE QUEUE SBReceiveQueue
GO
-- Create Send Service on Send Queue
CREATE SERVICE SBSendService
ON QUEUE SBSendQueue (SBContract)
GO
-- Create Receive Service on Recieve Queue
CREATE SERVICE SBReceiveService
ON QUEUE SBReceiveQueue (SBContract)
GO
-- Begin Dialog using service on contract
DECLARE @SBDialog uniqueidentifier
DECLARE @Message NVARCHAR(128)
BEGIN DIALOG CONVERSATION @SBDialog
FROM SERVICE SBSendService
TO SERVICE 'SBReceiveService'
ON CONTRACT SBContract
WITH ENCRYPTION = OFF

SET @Message =  N'AAAAAAAAAAA'; --  CAST(GETDATE() AS VARCHAR);
SEND ON CONVERSATION @SBDialog
MESSAGE TYPE SBMessage (@Message)
GO

what is best way to end a event notification

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simple question here...

if I want to keep an event service (and all its infrastructure - eg: queue, proc, etc...)...but it just want to 'turn it off'.

is it better to disable the underlying queue or issue a 'drop event notification'.

or is this split'n hair's....

thanks in advance

-mt


mike t.

Backup DBs through Service Broker: succeeds in one database and fails in the other.

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I created a test system on my PC in order to backup databases asynchronously using Service Broker.
the backup procedure is executed  through such a queue:

CREATE QUEUE [dbo].[MyQueue] WITH STATUS=ON , RETENTION=Off , ACTIVATION (STATUS=ON, PROCEDURE_NAME=[dbo].[MyBackupProc], MAX_QUEUE_READERS=1, EXECUTE AS Owner) ON [PRIMARY] 

The backup succeeds as far as it concerns the database on which the system is installed,
and fails in the other databases.

When I install the system on the other database - it succeeds now on it, and fails in the previous.

As I have already mentioned - everything was tested on my pc, no special definitions, both database were created using a simple "Create Database MyDB;" command, I'm the only user (and apparently- the sa), etc.
The backup commands (Full) always succeed when I execute them directly.
Microsoft SQL Server 2012 Standard (64-bit) And Microsoft SQL Server 214 CTP2 Enterprise Evaluation (64-bit)

Do you have any solution or explanation to the problem?



New attempt: Backup DBs through Service Broker

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I hope its OK to open a new thread in order to do new attempt from scratch instead of the previous one:
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/62e72493-8e63-4ded-83bf-cdd7fd3c8261/backup-dbs-through-service-broker-succeeds-in-one-database-and-fails-in-the-other?forum=sqlservicebroker

The following code creates a system based on Service Broker in order to backup databases asynchronously:

Use master;

If DB_ID('DB1') Is Not Null Drop Database DB1;
If DB_ID('DB2') Is Not Null Drop Database DB2;
Create Database DB1;
Create Database DB2;

ALTER AUTHORIZATION ON DATABASE::DB1 TO sa;
ALTER AUTHORIZATION ON DATABASE::DB2 TO sa;

Alter Database DB1 Set Enable_Broker;
Go

USE DB1
GO

IF  EXISTS (SELECT * FROM sys.objects WHERE object_id=OBJECT_ID(N'[dbo].[P_BackupIni]') AND type in (N'P', N'PC'))
DROP PROCEDURE [dbo].[P_BackupIni]
GO

IF  EXISTS (SELECT * FROM sys.services WHERE name=N'SB_Srvc_Src_BackUp')
DROP SERVICE [SB_Srvc_Src_BackUp]
GO

IF  EXISTS (SELECT * FROM sys.services WHERE name=N'SB_Srvc_Trgt_BackUp')
DROP SERVICE [SB_Srvc_Trgt_BackUp]
GO

IF  EXISTS (SELECT * FROM sys.service_queues WHERE name=N'SB_Q_Src_BackUp')
DROP QUEUE [dbo].[SB_Q_Src_BackUp]
GO

IF  EXISTS (SELECT * FROM sys.service_queues WHERE name=N'SB_Q_Trgt_BackUp')
DROP QUEUE [dbo].[SB_Q_Trgt_BackUp]

IF  EXISTS (SELECT * FROM sys.service_contracts WHERE name=N'SB_Cntrct_BackUp')
DROP CONTRACT [SB_Cntrct_BackUp]
GO

IF  EXISTS (SELECT * FROM sys.service_message_types WHERE name=N'SB_Msg_BackUp')
DROP MESSAGE TYPE [SB_Msg_BackUp]
GO

IF  EXISTS (SELECT * FROM sys.objects WHERE object_id=OBJECT_ID(N'[dbo].[P_Backup]') AND type in (N'P', N'PC'))
DROP PROCEDURE [dbo].[P_Backup]
GO

CREATE Procedure [dbo].[P_Backup] As
Declare	@DB Sysname,
		@Conversation_handle UniqueIdentifier,
		@Message_body Varchar(Max),
		@Message_Type_Name sysName,
		@I Int,
		@S Varchar(Max);

Receive Top(1)
		@Conversation_handle=Conversation_handle,
		@Message_body=Message_body,
		@Message_Type_Name=Message_Type_Name
From	SB_Q_Trgt_BackUp;

Exec	sp_xml_preparedocument @I Output, @Message_body
Select	@DB=DB
From    OpenXML (@I, '/Root',1)
        With (DB Varchar(100));

If		@DB='DB1'
		Backup Database DB1 To Disk='C:\Tmp\DB1_A.bak' With Compression;
Else If	@DB='DB2'
		Backup Database DB1 To Disk='C:\Tmp\DB2_A.bak' With Compression;

If		@DB Is Not Null
		Begin
		Select	@S='Backup Database '+@DB+' To Disk=''C:\Tmp\'+@DB+'_B.bak'' With Compression;';
		Exec(@S);
		End
GO

CREATE MESSAGE TYPE [SB_Msg_BackUp] AUTHORIZATION [dbo] VALIDATION=WELL_FORMED_XML
GO

CREATE CONTRACT [SB_Cntrct_BackUp] AUTHORIZATION [dbo] ([SB_Msg_BackUp] SENT BY ANY)
GO

CREATE QUEUE [dbo].[SB_Q_Src_BackUp] WITH STATUS=ON , RETENTION=OFF  ON [PRIMARY] 
GO

CREATE QUEUE [dbo].[SB_Q_Trgt_BackUp] WITH STATUS=ON , RETENTION=Off , ACTIVATION (STATUS=ON, PROCEDURE_NAME=[dbo].[P_Backup], MAX_QUEUE_READERS=1, EXECUTE AS Owner) ON [PRIMARY] 
GO

CREATE SERVICE [SB_Srvc_Src_BackUp]  AUTHORIZATION [dbo]  ON QUEUE [dbo].[SB_Q_Src_BackUp] ([SB_Cntrct_BackUp])
GO

CREATE SERVICE [SB_Srvc_Trgt_BackUp]  AUTHORIZATION [dbo]  ON QUEUE [dbo].[SB_Q_Trgt_BackUp] ([SB_Cntrct_BackUp])
GO

Create Proc [dbo].[P_BackupIni] @DB Sysname As
Declare @Cnvrst UniqueIdentifier;
Declare @Message Varchar(Max);

Select	@Message='<Root DB="'+@DB+'"></Root>';

Begin Dialog @Cnvrst
		From Service SB_Srvc_Src_BackUp
		To Service  N'SB_Srvc_Trgt_BackUp'
		On Contract  SB_Cntrct_BackUp
		With Encryption=Off;

Send On Conversation @Cnvrst
		Message Type SB_Msg_BackUp (@Message);
Go

The user executes P_BackupIni which initiates the execution of P_Backup, and passes to it the name of the database to backup.
P_Backup procedure backups the database twice - a direct backup and a dynamic backup (=using dynamic SQL).
The system is created on DB1.
Lets try to backup DB1 & DB2:

Exec P_BackupIni @DB='DB1';

Exec P_BackupIni @DB='DB2';

Both backups of DB1 succeeded (DB1_A.bak, DB1_B.bak)
but only one backup of DB2 succeded (DB2_A.bak) and the dynamic one failed.
From the system perspective - all the backups were done by the same user/Login.
As I've already mentioned - it was tested on my laptop, I'm the only user, I'm an sa etc.

Any explanation why the dynamic backup fails?


El castellano no es mi lengua materna. Discúlpenme por los errores gramaticales, y, si pueden, corríjanme en los comentarios, o por correo electrónico. ¡Muchas gracias! Blog: http://about.me/GeriReshef

Conversation group id question

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HI

I have an example ( see below ).

I expect to have all messages sent using this code to have the same group id but they are all different. what I am doing wrong?

Leonid.

DECLARE

@conversationHandle uniqueidentifier

DECLARE @usergroup uniqueidentifier

select @usergroup = uid from bvuser where userid = 1

select

@usergroup

Begin

Transaction

BEGIN

DIALOG @conversationHandle

FROMSERVICE [BvMainResponseService]

TOSERVICE'BvMainService'

ONCONTRACT [BvMainContract]

WITH RELATED_CONVERSATION_GROUP = @usergroup;

-- Send a message on the dialog

SEND

ONCONVERSATION @conversationHandle

MESSAGETYPE [BvTaskMsg]

(

N'Test')

commit

 

 

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