Message Could Not Be Delivered Because The Conversation Endpoint Has Already Closed Error In Profiler

Oct 12, 2007



Hi,

I already had a thread for same problem but didn't recieved any response in last 4-5 months so I created a new thread for this



I am using service broker in between two database servers. following is the way i am sending and receiving messages



Send



BEGIN TRAN
BEGIN DIALOG CONVERSATION @handle
FROM SERVICE @SendService
TO SERVICE @ReceiveService
ON CONTRACT @Contract
WITH LIFETIME = @lifetime;

SEND ON CONVERSATION @handle
MESSAGE TYPE @xmlMessageType(@xmlMessage);
COMMIT



Receive



BEGIN TRAN;
RECEIVE TOP(1) @xmlMessage = message_body,
@handle = conversation_handle,
@message_type = message_type_name
FROM TransactionQueue;

----------------------------------------------------------------------------------------------------
-- Check to make sure a message was returned to process. In theory this should never happen.
----------------------------------------------------------------------------------------------------
IF @@rowcount = 1
BEGIN

IF @message_type = 'http://schemas.microsoft.com/SQL/ServiceBroker/EndDialog'
BEGIN
END CONVERSATION @handle;
COMMIT
RETURN 0
END

IF @message_type = N'http://schemas.microsoft.com/SQL/ServiceBroker/Error'
BEGIN
RAISERROR(N'Received error %s from service [Target]', 10, 1)
END CONVERSATION @handle;
COMMIT
RETURN 0
END


SET @sql = 'EXEC '+@message_processor_name+' @xml'

BEGIN TRAN
EXEC sp_executesql @sql, N'@xml XML', @xml=@xmlMessage
COMMIT TRAN
END CONVERSATION @handle;
END
COMMIT



I see Messages are delivered to the target every thing working fine other than following errors which i am seeing in profiler.



1) "This message could not be delivered because the conversation endpoint has already been closed." I see this error on initiator end. Is it like ending conversation on initiator end when i get "EndDialog" send an acknowledgement, which cannot be recieved by target as it has already ended conversation.



2) "An error occurred while receiving data: '64(The specified network name is no longer available.)'." I don't have much idea about the reason for this error. But in profiler i see value for GUID is different for this error and the real message.



Let me know if you need any other information

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Poison Message. The Conversation Endpoint Is Not In A Valid State For SEND.

Aug 1, 2007

Hi all, i searched everywhere but couldn't find any info on the following error that i'm currently receiving:

"The conversation endpoint is not in a valid state for SEND. The current endpoint state is 'DI'."

I understand that this is due to some problem in my send/receive protocol but how do i fix this problem so that i can continue with my testing? Right now i'm forced to drop my entire test database and reinstall everytime this message shows up because i can't send/receive any messages at that point. Is there anyway to get rid of it?

Thanks in advance. This is driving me nuts.

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Mar 28, 2007

what can cause the above error when connecting to an endpoint via a c# app? the app, and sql are both on my machine ( im just doing this for test purposes and to learn something new.)

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Aug 8, 2007

I run SB between 2 SQL servers. In profiler on an initiator side I see next error: 'This message could not be delivered because its message timestamp has expired or is invalid'. For the conversation we use best practice, i.e. target closes a conversation. Target side succeed to close conversation, but initiator still stay in DO (disconnect_outbound).
What is a reasone for the error? What to do?

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Aug 8, 2007

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Jan 15, 2008



Hello,
How can I find the cause on the error that marked one conversation with status 'ER' in sys.conversation_endpoints?

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Sep 25, 2006

We have been having a problem with service broker for quite a while now and searching on these forums and more generally on the web has not yielded any kind of answer...

Our application utilises service broker within a single database (there is no cross database, cross instance or cross server communication). There are approximately 12 queues which are used to varying degrees. A few of the queues have a throughput rate in the order of up to 100s per minute at peak periods.

In some scenarios we are able to make use of persistent conversations but the majority of messages are sent on their own conversation or in small batches on their own conversation.

Some time ago we found that the database was growing in size more than expected due to a build up of data in the service broker meta data internal tables, exposed via the sys.conversation_endpoints system view.

We identified a problem in the application that was preventing some conversations from being closed and have now fixed this.

However, we are still experiencing a build up in the service broker tables and sys.conversation_endpoints shows this is now due to a very large number of conversations in the "CLOSED" state.

I know that conversations are kept around to prevent replay attacks but thought they were supposed to be cleared after about 30 minutes. This is certainly not happening as we currently have conversations that were opened on the 18th September, a full week ago. We currently have about 350,000 closed conversations and this figure is increasing!

We have tried restarting the SQL Server instance with no effect.

I have been using a script to loop through all closed conversations and get rid of them using the "WITH CLEANUP" clause but I'm loath to create a scheduled task that does this in the background when service broker should be doing the job itself.

Has anybody experience this problem and, even better, have any idea how to solve it?

Daniel

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Target Conversation Endpoint Not Clearing Out

May 8, 2007

Hi There



I am ending conversations properly for a dialog, the end conversation at the target properly marks the conversation as closed in sys.conversation_endpoints and sends the EndDialog message to the initiator.

The initiator get the EndDialog message from the target and ends the conversation and it clears out of sys.conversation_endpoints.



I know that to avoid reply attacks that the conversation at the target will only clear out in 30 minutes.



However it has been a day now and the conversation is still sitting in sys.conversation_endpoints as CLOSED at the target.



How do i troubleshoot this ? Why is the conversation not clearing?



Thanx

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Jul 28, 2005

    When I send message from Server1 to Server2,I found the error "This message could not be delivered because it is duplicate" in SQLProfiler on Target, why message can be duplicate ? who can help me?

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Message Could Not Be Delivered Errors In Service Broker

Apr 17, 2007



Hi,



I am using service broker in between two database servers. following is the way i am sending and receiving messages



Send



BEGIN TRAN
BEGIN DIALOG CONVERSATION @handle
FROM SERVICE @SendService
TO SERVICE @ReceiveService
ON CONTRACT @Contract
WITH LIFETIME = @lifetime;

SEND ON CONVERSATION @handle
MESSAGE TYPE @xmlMessageType(@xmlMessage);
COMMIT



Receive



BEGIN TRAN;
RECEIVE TOP(1) @xmlMessage = message_body,
@handle = conversation_handle,
@message_type = message_type_name
FROM TransactionQueue;

----------------------------------------------------------------------------------------------------
-- Check to make sure a message was returned to process. In theory this should never happen.
----------------------------------------------------------------------------------------------------
IF @@rowcount = 1
BEGIN

IF @message_type = 'http://schemas.microsoft.com/SQL/ServiceBroker/EndDialog'
BEGIN
END CONVERSATION @handle;
COMMIT
RETURN 0
END

IF @message_type = N'http://schemas.microsoft.com/SQL/ServiceBroker/Error'
BEGIN
RAISERROR(N'Received error %s from service [Target]', 10, 1)
END CONVERSATION @handle;
COMMIT
RETURN 0
END


SET @sql = 'EXEC '+@message_processor_name+' @xml'

BEGIN TRAN
EXEC sp_executesql @sql, N'@xml XML', @xml=@xmlMessage
COMMIT TRAN
END CONVERSATION @handle;
END
COMMIT



I see Messages are delivered to the target every thing working fine other than following errors which i am seeing in profiler.



1) "This message could not be delivered because the conversation endpoint has already been closed." I see this error on initiator end. Is it like ending conversation on initiator end when i get "EndDialog" send an acknowledgement, which cannot be recieved by target as it has already ended conversation.



2) "An error occurred while receiving data: '64(The specified network name is no longer available.)'." I don't have much idea about the reason for this error. But in profiler i see value for GUID is different for this error and the real message.



Let me know if you need any other information



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From The Sql Profiler Constantly Displays Exec Sp_executesql N'BEGIN CONVERSATION TIMER ... It That Ok?

Mar 8, 2007

Hello,
I'm using SQL service Broker 2005 with ASP.NET 2.0 in order to use the sql cache dependency.
everything works fine...
I have only a doubt regarding a query that is constantly executed on mu db ( i can see it be means of the SQL Profiler)

The query is:
exec sp_executesql N'BEGIN CONVERSATION TIMER ("'') TIMEOUT = 120; WAITFOR(RECEIVE TOP (1) message_type_name, conversation_handle,
cast(message_body AS XML) as message_body from [SqlQueryNotificationService-GUID]), TIMEOUT @p2;',N'@p2 int',@p2=60000

The web application is not running from a browser ...

It this ok or I forget to clean/reset something from my web application and/or sql server?

Thank you

Marina B.





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Jan 29, 2008

I've got a situation where I want to put request message on a queue. Because starting a conversation is the only way to put messages on a queue I have to start a conversation with myself. So my Begin Dialog Statement looks something like this:



DECLARE @conversation_handle UNIQUEIDENTIFIER;

BEGIN DIALOG CONVERSATION @conversation_handle

FROM SERVICE [ServiceName1]

TO SERVICE 'ServiceName1'

ON CONTRACT [ContractName1]

WITH ENCRYPTION = OFF;

SELECT @conversation_handle AS ConversationHandle



I haven't noticed any problems with doing this but I wanted to know if there was anything wrong with it. Does someone know what problems this might cause?

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Jul 23, 2007

when ever I send my message thru Service Broker I am getting an error message like this "



"Dialog security is not available for this conversation because there is no remote service binding for the target service. Create a remote service binding, or specify ENCRYPTION = OFF in the BEGIN DIALOG statement."



This I found in sys.transmission_queue

Please reply with your comments

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Dec 3, 2007

Hi

I'm using service broker and keep getting errors in the log even though everythig is working as expected

SQL Server 2005
Two databases
Two end points - 1 in each database
Two stored procedures:
SP1 is activated when a message enters the sending queue. it insert a new row in a table
SP2 is activated when a response is sent from the receiving queue. it cleans up the sending queue.

I have a table with an update trigger
In that trigger, if the updted row meets a certain condition a dialogue is created and a message is sent to the sending queue.
I know that SP1 and SP2 are behaving properly because i get the expected result.
Sp1 is inserteding the expected data in the table
SP2 is cleaning up the sending queue.

In the Sql Server log however i'm getting errors on both of the stored procs.
error #1
The activated proc <SP 1 Name> running on queue Applications.dbo.ffreceiverQueue output the following: 'The conversation handle is missing. Specify a conversation handle.'

error #2
The activated proc <SP 2 Name> running on queue ADAPT_APP.dbo.ffsenderQueue output the following: 'The conversation handle is missing. Specify a conversation handle.'

I would appreceiate anybody's help into why i'm getting this. have i set up the stored procs in correctly?

i can provide code of the stored procs if that helps.

thanks.

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Hi,

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The Error messega is like following:
SQL Server does not exist or access denied.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: SQL Server does not exist or access denied.


Thanks,

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Mar 13, 2008

First off I understand that it is a horrible idea to run extremely large/long running reports, but sometimes it ends up being the best possible solution due to external forces.




I've got a 25,000 page report that we recently converted from crystal reports to SSRS. The SSRS server is a 64bit 2003 server with 32 gigs of ram running SSRS 2005. When running the report through the report manager web application, it renders in the browser/viewer after about 12 minutes. Exporting to pdf through the browser/viewer in the report manager takes an additional 55 minutes. It does work and it produces a whopping 1.03gb pdf.




Unfortunately, I've run into a problem when trying to do this from a console application using the SSRS client API. After about 30-35 minutes I get an exception on the client with the following error:
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Here is the api call:




Code Snippet

byte[] m_data = reportingService.Render(this.ReportPath, this.ExportFormat, null,
deviceInfo, selectedParameters, null, null, out encoding, out m_mimeType,

out usedParameters, out warnings, out streamIds);
Here are some things I've tried so far:


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disabled http keep alives on the report server
increased the script timeout on the report server
set the report to never time out on the server
set the report timeout to several hours on the client call
Disabled antivirus on the client side, and verified there was no antivirus running on the reporting server.
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May 3, 2006

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Here is the code for the procedure:

CREATE Procedure dbo.GetRepEmailByZip

@sessionid varchar(50),
@zip varchar(5)

AS

Begin Transaction

INSERT INTO dbo.SupportRequests(firstname,lastname,schoolname, address,city,state,zip,phone,email,currentcustomer ,implementationtype,producttype,comment)
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FROM dbo.Temp_ContactInfo
WHERE sessionid = @sessionid)


--If Transacation fails, stop execution of procedure, return error code and Rollback Transaction

IF @@ERROR<>0 OR @@RowCount = 0
BEGIN
ROLLBACK TRANSACTION
--return value
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--If Transaction succeeds, commit transaction, continue and process the select statement
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SELECT r.email
FROM PostalCodes p
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INNER JOIN RepList r ON r.RepID = z.RepID
WHERE p.ZipCode = @zip
GO



This is the code I'm calling to execute the procedure and return the recordset:


set GetRepEmail = Server.CreateObject("ADODB.Command")
With GetRepEmail
.ActiveConnection = MM_DBConn_STRING
.CommandText = "dbo.GetRepEmailByZip"
.CommandType = 4
.CommandTimeout = 0
.Prepared = true
.Parameters.Append .CreateParameter("@RETURN_VALUE", 3, 4)
.Parameters.Append .CreateParameter("@sessionid", 200, 1,50,usrid)
.Parameters.Append .CreateParameter("@zip", 200, 1,5,zip)
set RepEmail = .Execute()
End With

Dim x, y
x = RepEmail.RecordCount
y = RepEmail.State
Response.Write(x)
Response.Write("<br>")
Response.Write(y)
'Response.Write(RepEmail("email"))
Response.End()


I'm getting "Operation is not allowed when the object is closed", which is occuring on the following line:

x = RepEmail.RecordCount

I'm trying to determine if this is problem within my procedure or in the application code.

Thanks in advance for any help.

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2
3 Connect()
4
5 SQL = "SELECT * FROM counter"
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7 dbRead()
8
9 If dbReader.HasRows = True Then
10
11 dbReader.Read()
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13 hits = hits + 1
14 dbClose()
15
16 SQL = "UPDATE counter SET hits=" & hits
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18 dbExecute()
19
20 Else
21
22 SQL = "INSERT INTO counter(ipaddress,hits)"
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24 dbExecute()
25
26 End If
27
28 Session("ctr") = True
29
30 End If
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2 Conn = New SqlConnection("Initial Catalog=NURSETEST;User Id=sa;Password=sa;Data Source=KSNCRUZ")
3 If Conn.State = ConnectionState.Open Then
4 Conn.Close()
5 End If
6 Conn.Open()
7 End Sub
8
9 Public Sub Close()
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Oct 26, 2007



Hi,
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Mar 21, 2007

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Please help if you can.

Regards, Major (that is my Christian name ;-)



Code

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Sep 18, 2007



Hi,


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Error



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Home

The installation is running on three servers - 1 sql cluster (sql 2000 sp4) and two IIS servers all running windows 2000 sp4.

The Reportserver website runs using identity impersonation using the .net machine.config file pointing to an encrypted registry key entry holding the userid and password. It has been moved from the default website to it's own website but has been working with no issues for years. No obvious patches have been applied or security changes made that could effect the application


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Cheers


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AMP Capital Investors

(p) +61 2 9257 1746

(m)+61 434 327 150

(f) + 61 2 9257 1090

(e) daniel.worby@ampcapital.com

(w) www.ampcapital.com.au

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We are getting a problem when the below error Log

Server: SQL Server 2005 and SP1.



Then, All the Web Servers will drop all connections and stop the network service. Later, the network service will start up automatically but all the before service is dropped.

We would like to know the error coming from?



Error Log

================

TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host



Event Type: Warning
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1309
Date: 4/29/2006
Time: 10:48:47 AM
User: N/A
Computer: 88DBWEB0
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 4/29/2006 10:48:47 AM
Event time (UTC): 4/29/2006 2:48:47 AM
Event ID: 77910e6688484582bb1c29808feef883
Event sequence: 128
Event occurrence: 13
Event detail code: 0

Application information:
Application domain: /LM/W3SVC/24978983/Root/ph-3-127907437121075328
Trust level: Full
Application Virtual Path: /ph
Application Path: D:DB88ph
Machine name: 88DBWEB0

Process information:
Process ID: 1568
Process name: w3wp.exe
Account name: NT AUTHORITYNETWORK SERVICE

Exception information:
Exception type: SqlException
Exception message: A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)

Request information:
Request URL: http://88db.jobsdb.com/ph/Views/MediaUpload.aspx?PostID=50202&Type=I&panelid=postimagediv
Request path: /ph/Views/MediaUpload.aspx
User host address: 192.168.10.10
User: 50077
Is authenticated: True
Authentication Type: Forms
Thread account name: NT AUTHORITYNETWORK SERVICE

Thread information:
Thread ID: 15
Thread account name: NT AUTHORITYNETWORK SERVICE
Is impersonating: False
Stack trace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.WriteSni()
at System.Data.SqlClient.TdsParserStateObject.ExecuteFlush()
at System.Data.SqlClient.TdsParser.TdsExecuteRPC(_SqlRPC[] rpcArray, Int32 timeout, Boolean inSchema, SqlNotificationRequest notificationRequest, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
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Custom event details:

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.


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Conversation Handle Reuse And Conversation Handle XXX Not Found

Jan 18, 2008



We have implemented our service broker architecture using conversation handle reuse per MS/Remus's recommendations. We have all of the sudden started receiving the conversation handle not found errors in the sql log every hour or so (which makes perfect sense considering the dialog timer is set for 1 hour). My question is...is this expected behavior when you have employed conversation recycling? Should you expect to see these messages pop up every hour, but the logic in the queuing proc says to retry after deleting from your conversation handle table so the messages is enqueued as expected?

Second question...i think i know why we were not receiving these errors before and wanted to confirm this theory as well. In the queuing proc I was not initializing the variable @Counter to 0 so when it came down to the retry logic it could not add 1 to null so was never entering that part of the code...I am guessing with this set up it would actually output the error to the application calling the queueing proc and NOT into the SQL error logs...is this a correct assumption?

I have attached an example of one of the queuing procs below:




Code Block
DECLARE @conversationHandle UNIQUEIDENTIFIER,
@err int,
@counter int,
@DialogTimeOut int,
@Message nvarchar(max),
@SendType int,
@ConversationID uniqueidentifier
select @Counter = 0 -- THIS PART VERY IMPORTANT LOL :)
select @DialogTimeOut = Value
from dbo.tConfiguration with (nolock)
where keyvalue = 'ConversationEndpoints' and subvalue = 'DeleteAfterSec'
WHILE (1=1)
BEGIN
-- Lookup the current SPIDs handle
SELECT @conversationHandle = [handle] FROM tConversationSPID with (nolock)
WHERE spid = @@SPID and messagetype = 'TestQueueMsg';
IF @conversationHandle IS NULL
BEGIN
BEGIN DIALOG CONVERSATION @conversationHandle
FROM SERVICE [InitiatorQueue_SER]
TO SERVICE 'ReceiveTestQueue_SER'
ON CONTRACT [TestQueueMsg_CON]
WITH ENCRYPTION = OFF;
BEGIN CONVERSATION TIMER ( @conversationHandle )
TIMEOUT = @DialogTimeOut
-- insert the conversation in the association table
INSERT INTO tConversationSPID
([spid], MessageType,[handle])
VALUES
(@@SPID, 'TestQueueMsg', @conversationHandle);

SEND ON CONVERSATION @conversationHandle
MESSAGE TYPE [TestQueueMsg] (@Message)

END
ELSE IF @conversationHandle IS NOT NULL
BEGIN
SEND ON CONVERSATION @conversationHandle
MESSAGE TYPE [TestQueueMsg] (@Message)
END
SELECT @err = @@ERROR;
-- if succeeded, exit the loop now
IF (@err = 0)
BREAK;
SELECT @counter = @counter + 1;
IF @counter > 10
BEGIN
-- Refer to http://msdn2.microsoft.com/en-us/library/ms164086.aspx for severity levels
EXEC spLogMessageQueue 20002, 8, 'Failed to SEND on a conversation for more than 10 times. Error %i.'
BREAK;
END
-- We tried on the said conversation, but failed
-- remove the record from the association table, then
-- let the loop try again
DELETE FROM tConversationSPID
WHERE [spid] = @@SPID;
SELECT @conversationHandle = NULL;
END;

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