Thoughts/patterns For The Following Use Case Related To Service Broker Dialog Network Connection
Dec 29, 2006
Hi,
I would appreciate any thoughts/ideas on the following use case for the distributed service broker application we plan to migrate from our existing proprietary tcp based message protocol using database tables for reliability.
There are two ssb services running in separate sql server instances, each on a different server machine. For simplicity, let us assume the ssb endpoint names are SSBA, SSBB. SSBB is the Initiator of the Dialog while SSBA is the Target. Now the requirement is that if the underlying network communication between the two ssb endpoints(SSBA and SSBB) is broken or if the critical service SSBB is down, then processing of any incoming message into SSBA's queue from a third service broker service (say SSBEXPR) running within a SqlExpress instance should be delayed until SSBB is alive and network communication between SSBA and SSBB is established. In our existing implementation (wherein SSBA, SSBB and SSBEXPR are windows services) we use a combination of TCP socket disconnects and Heartbeat messages between SSBA and SSBB to determine the health of network connection and that of the SSBB service.
Now my understanding of how the underlying network connection for a ssb dialog works is that if there is no activity on a dialog for a certain amount of time then the underlying network connection is closed. Is there a way to specify the amount of time to say infinite value or something and thus change this behavior? My other question is how can one query the underlying network connection (i.e. a row from sys.dm_broker_connections) associated with a particular conversation? If none of this is possible, then any other patterns/ideas/approach is welcome.
Thanks,
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May 25, 2006
what is the difference between the Dialog security and the transport security?
If I disable the dialog security can the messages be sent to the a different SQL server instance. As the transport security will encrypt the messages.
If I don't create a certificate to be used by the transport security can the messages be sent to another SQL server instance?
Can a message be sent to another SQL Server instance without creating a REMOTE Service Binding?
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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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Sep 10, 2007
How to prevent the hang on the initator service broker if the target service broker is not started?
Our case has two service brokers (two databases), sometime, the target is need to turn off. But the sitation is the initator service broker (in fact, the message is sent from triggers) become hang, I want to prevent this case and continue to operation, and the messages should queue and will continue to send to target service broker when it startup. How should I do?
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Nov 11, 2005
When I configure SSB in two machine to send message, I get a error message in target machine SQLProfiler:
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Mar 22, 2007
Hi
I have recently upgraded several of our SQL2005 servers to SP2a :) version 9.0.3050
and find that I can no longer script the Service Broker objects from a remote connection. The error I am getting is:
Script failed for MessageType 'MyMessageType' (Microsoft.SqlServer.Smo)
Additional Information
Either the object or one of its properties is not supported on the target server version
(Microsoft.SqlServer.Smo)
Now I know that this worked pre SP2 using exactly the same setup. Has anyone else experienced this or know how to fix it?
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Jul 17, 2007
Hi All,
I have created an application using service broker.i have a source database which in a particular server say server A and want to send message to target database which is in another server say server B.
i have configured all the service broker objects and advanced service broker objects in correct way by reffering the site --http://www.sqlservercentral.com/columnists/sindukuri/2797.asp
but when i am trying to send message from my source server to target server , i am getting the following error in sys.transmission_queue.
Connection attempt failed with error: '10061(No connection could be made because the target machine actively refused it.)'.
I have enabled the tcp port in both the server.
Note-My source server is an XP and Target Server is an windows server 2003.
can anybody please tell do i need to set any extra configuration in windows server 2003 or any thing do l need to do which i have left.
please do help!!!!!!!!!!!!!!!!!!
Thanks a lot in advance.....................................
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Feb 16, 2008
Hello, I receive this error "The SQL Server Service Broker for the current database is not enabled, and as a result query notifications are not supported. Please enable the Service Broker for this database if you wish to use notifications." I attach the database in Management Studio to query and enable the broker using the scrip below but to no avail. ALTER DATABASE DataName SET ENABLE_BROKER ‘''<<------successfulandSELECT is_broker_enabled FROM sys.databases WHERE name = 'Database name' ‘'''<<-------value is 1 Global.asax ... Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs) System.Data.SqlClient.SqlDependency.Start(ConfigurationManager.ConnectionStrings("dataConnectionString1").ConnectionString) End Sub...Web.config ... <connectionStrings> <add name="dataConnectionString1" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|jbp_data.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" /> <add name="ASPNETDBConnectionString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPNETDB.MDF;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" /> </connectionStrings>... Hope you could help. cheers,imperialx
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Jul 12, 2007
I just learned I can deploy and schedule jobs to run SSIS packages (via job/sqlagent) without the Integration Service (agent) itself actually running alongside (or on) the server. (Double-click on manifest, deploy IS package to server, create job/job step to run IS package, watch it run even when integration service is completely disabled)
Other than convenient viewing, configuring, and RMC running w/in SQL Server Mgmt Studio 2005, why then do I need the integration service running on a production box at all? When do I really need the IS service itself?
In our (finance) world only (a) an act of God or (b) a DBA can touch production databases/servers. Allowing anyone to connect to yet another service - in this case, an integration service - to meddle w/ a package would be a no no, so...
1) Could I trouble someone for a concrete, critical reason why the DBA should enable it on a production server. Speed? Caching? Peace of mind knowing everything is piled onto and neatly running on the server?
2) On a more minor note, if I'm deploying a package to be housed solely w/in MSDB, is there anyway to prevent the prompt of a file location during deployment, i.e. the creation of an empty directory that would otherwise hold package dependencies if I were running it as a file?
We'd like to deploy only to MSDB (I know all the pros/cons w/r/t saving dtsxs to files v. msdb) and keep deployments clean (read: all in one place). DR is via SAN-to-SAN replication with, among other things, msdb cleanly getting replicated. We would very much like to avoid having to worry about (more) file/directories sitting out on a server share to be replicated to DR (it seems the default is to allow deployments to directories on the SQL server instance itself..ugh) Any architectural insights on this would be appreciated.
Kind Regards,
Jim
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May 31, 2007
Hi Remus,
I am experiencing the same problem, and I can't get the easy fix to work. I drop and create the DB's in between tests, so it is not related to having an old certificate in the DB, as in the case of Tilfried.
The situation is as follows:
DB1 owned by login1, has a user for login2; this DB is for the initiator
DB2 owned by login2, has a user for login1; this DB hosts the target
Both DB's have TRUSTWORTHY flag set to ON
Error in sys.transmission_queue: 'Error 916, State 3: The server principal "Login1" is not able to access the database "DB2" under the current security context.
Going on a limp, I decide to add a remote service binding in DB1, binding the user for Login2 to the target service, even though BOL explicitly states that this is only required for cross-server communications. This does change the situation - I still get an error, but a new message is sys.transmission_queue: "Dialog security is unavailable for this covnersation because there is no certificate bound to the database principal (Id: 5). Either create a certificate for the principal, or specify ENCRYPTION = OFF when beginning the conversation." I already know that the first option works, but I wanted to get the simple solution running. As for the second option, I doublechecked and the initiating procedure DOES already specify ENCRYPTION = OFF in the BEGIN DIALOG CONVERSATION command. My theory is that the remote service binding somehow forces SB to use encryption, but (a) that is not stated in the error message, and (b) if so, then how to get the messages sent over to the target service without using the binding?
==> EDIT: Just saw that you confirmed this theory in your last reply to Tlifried. So I am indeed back to having to find out how to get this to work without remote service binding - it should be possible, but how???
BTW, SELECT @@VERSION shows that I'm on build 3054, in case it matters.
Between all the errors in BOL and less than helpfull error messages produced by SB, I feel like I'm slowly losing my sanity. Please help!
Best regards,
Hugo Kornelis
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Apr 5, 2007
Hi,
I am struggling with the position SSB could take in an SOA. If I would want a broker in the general sense, meaning an intermediary sitting between applications which exchange information through messaging, would SSB be a good candidate? I know Biztalk is probably the primary candidate, but in my scenario I would end up with Biztalk apps with empty orchestrations. Also, I think Biztalk is more expensive to manage. So I am looking for a lightweight broker for a simple SOA targeted at application interoperability, no fancy business processes in sight.
I look forward to some responses.
Kind regards,
Neeva
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Aug 17, 2007
hi ,
i am creating a service broker application between two different instance.when i am initiating a dialog from the source my message remain in the sys.transmission_queue.but its transmission_status column is empty.
i attached the profiler with both source and target by including all the service broker event.
in my source profiler i am getting the error like -- Connection attempt failed with error: '10061(No connection could be made because the target machine actively refused it.)'. with event Broker:connection
and in the target profiler error is --This message could not be delivered because the security context could not be retrieved. with event Broker:Message Undelivarible.
i have checked my port also using telnet with remotely and localy both working fine. i am using port no. 4001
and i have mentioned the port no. in the address of the route.
bt still getiing the error.
please help!!!!!!!!!!!
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Mar 30, 2007
I am trying to send a message between to SQL Server 2005 instances on two different machines. I have checked all my routes and all my objects appear to be setup correctly. However, when running Profiler on the target machine, I receive the "This message has been dropped because the TO service could not be found. Service name: "[tcp://mydomain.com/TARGET/MyService]". Message origin: "Transport". This is my activated stored procedure that is sending the message to the target service. I am using certificate security. Any help appreciated....
CREATE PROCEDURE [usp_ProcessMessage]
AS
BEGIN
SET NOCOUNT ON;
DECLARE @conversation_handle uniqueidentifier
DECLARE @message_body AS VARBINARY(MAX)
WHILE (1=1)
BEGIN
BEGIN TRANSACTION;
WAITFOR(RECEIVE TOP (1)
@conversation_handle = conversation_handle,
@message_body = message_body
FROM [tcp://mydomain.com/INITIATE/MyQueue]
), TIMEOUT 1000;
IF (@@ROWCOUNT = 0)
BEGIN
COMMIT;
BREAK;
END
END CONVERSATION @conversation_handle
IF @message_body IS NOT NULL
BEGIN
BEGIN DIALOG CONVERSATION @conversation_handle
FROM SERVICE [tcp://mydomain.com/INITIATE/MyService]
TO SERVICE '[tcp://mydomain.com/TARGET/MyService]'
ON CONTRACT [tcp://mydomain.com/INITIATE/MyMessage/v1.0]
WITH ENCRYPTION = ON, LIFETIME = 600;
SEND ON CONVERSATION @conversation_handle
MESSAGE TYPE [tcp://mydomain.com/TARGET/VisitMessage]
(@message_body);
END
COMMIT;
END
END
GO
My endpoints are created like so:
CREATE ENDPOINT MyEndpoint
STATE = STARTED
AS TCP
(
LISTENER_PORT = 4022
)
FOR SERVICE_BROKER (AUTHENTICATION = CERTIFICATE MasterCertificate)
GO
GRANT CONNECT TO CertOwner
GRANT CONNECT ON ENDPOINT::MyEndpoint TO CertOwner
GO
And my routes like so:
GRANT SEND ON SERVICE::[tcp://mydomain.com/INITIATE/MyService] TO CertOwner
GO
CREATE REMOTE SERVICE BINDING [MyCertificateBinding]
TO SERVICE '[tcp://mydomain.com/TARGET/MyService]'
WITH USER = CertOwner,
ANONYMOUS=OFF
CREATE ROUTE [tcp://mydomain.com/INITIATE/MyRoute]
WITH SERVICE_NAME = '[tcp://mydomain.com/TARGET/MyService]',
BROKER_INSTANCE = N'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx',
ADDRESS = N'TCP://xxx.xx.xx.xx:4022'
GO
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Sep 20, 2005
I am in the process of evaluating the use of Service broker for messaging in a load balanced configuration, and am not having any success. My configuration is as follows. 1) Master database on Box #1 which is the initiator of all dialogs 2) Target database on Box #2 3) Target database on Box #3 One of my goals is that the databases on Box #2 and #3 are as close to identical as possible. My routing table on Box #1 looks something like the following Name remote_service_name broker_instance address TargetOne TargetService
E96DC67E-F696-4D93-8545-C2E92157E32D tcp://server1:4022/ TargetTwo TargetService
56607120-26AA-4AAA-B9E4-F14689C40E41 tcp://server2:4022/ My messaging process begins with a dialog initiated from the master database (Box #1) to each of the target services. At this time, only the first server "tcp://server1:4022/" is receiving messages. The sys.transmission_queue shows a message outbound to "tcp://server2:4022/" with a blank status. I believe that my delivery problem has something to do with the resolution of the dialog certificate need for the conversation. The MSDN documentation states that: "Service Broker uses a remote service binding to locate the certificate to use for a new conversation...The certificate for user_name must correspond to the certificate for a user in the database that hosts the remote service." I am confused as to how I would configure remote service binding if one can not create more than one binding for the same remote_service_name. The following throws an exception on the last creation of the binding.
---CODE SNIP---
CREATE CERTIFICATE UFEDlgCertTargetPublic
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Feb 7, 2007
Hi Remus,
I just started looking into SB about a week ago, so my question is likely to be pretty lame. However, that's not going to stop me from asking it :-)
We're trying to do something similar to what you're describing here. How do you "reset" a dialog timer? Why would you need to deal with resetting timers (or with timers at all for that matter) in the event of a success? Couldn't you rewrite the logic to be as follows?
begin transaction
receive message
if message is web request
save state of request (http address, caller etc)
else if message is retry timer message
load state of request
endif
commit
do the web request (no transaction open)
if success
begin transaction
send back response
end conversation
commit
else
set a retry timer on the dialog (say 1 minute) using BEGIN DIALOG TIMER
endif
Also, when you set the retry timer you have to associate it with the saved request state, right? Otherwise, how will the service know which request to load on receipt of the timer message?
TIA.
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Sep 5, 2007
when i want to open sql it show me error message and when i try again with ctrl+n it works but not complite! i have both .NET2003 and 2005 in my computer under mssql2005 windows2003EP
Failed to open connection dialog.
------------------------------
ADDITIONAL INFORMATION:
Could not load file or assembly 'SqlMgmt, Version=9.0.242.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. Strong name validation failed. (Exception from HRESULT: 0x8013141A) (mscorlib)
------------------------------
Strong name validation failed. (Exception from HRESULT: 0x8013141A)
------------------------------
BUTTONS:
OK
------------------------------
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Sep 26, 2007
I am doing some research to see if the Service Broker technology would help my company with our Enterprise application. Here is our scenario: We have a 3 tier system. The first tier needs to contact the second tier asynchronously. Hence, using queues is a good option. However, the process that needs to happen on the second tier is mostly process intensive with little database updates. Is it still worth our time to use Service Broker?
I like the concept of Activation that Service Broker provides. But, from what I am reading most of the documentation describes activation as a way to call another stored proc. I definitely dont' want to do any process intensive work on the SQL server. So here comes my question...
How would I use a windows service to listen to the activation event from the Service Broker. I could have multiple windows services watching the same queue (scalable). Would I have to handle collisions myself? If so, I think I would rather keep it simple, and just use a simple table as my queue.
Thanks for your comments in advance...
Vijay.
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May 15, 2007
Microsoft recommends that you do not use the Network Service account to run the SQL Server service (see http://msdn2.microsoft.com/en-us/library/ms143504.aspx).
Can anyone tell me what the drawbacks are of doing this?
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Aug 17, 2006
Hello,
This has been happening to me since I started using Configuration files. I
use one XML config file that stores Machine Specific settings and one
connection string to my Metadata database. The problem is the database
connection.
When I set the conection in the Configuation file, save, close and reopen
the package, a dialog box opens with the title "Synchronize Connection
Strings".
To reproduce the problem:
1. Ceate New SSIS Project
2. New Data Source Localhost.Adventureworks
3. In Package.dtsx create an New Connection from Data Source...
4. Choose AdventureWorks
5. Save Package
6. Close Package
7. Open Package
There is no problem at this point.
8. Enable Package Configurations
9. Create a new XML Configuration File
10. Give it a name and a location
11. Click Next
12. Under Connection Managers Click Adventure Work
13. Click Next
14. Give it a Name
15. Click Finish
16. Save
17. Close
18. Open
Uh-Oh!
"Synchronize Connection Strings" Dialog Box
Hare is what it tells me.
Connection
Adventure Works
Data Source
Adventure Works
Old Connection String
Data Source=.;User ID=;Initial Catalog=AdventureWorks;Integration
Security=True;
Old Connection String
Data Source=.;Initial Catalog=AdventureWorks;Integated Security=True
19. Press OK
20. Save Package
21. Close
22. Open
Uh-Oh, still there.
Has anyone else run into this? If so, how can I get around it?
Thank you for your help.
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Jul 18, 2007
I start SQL Server Management Studio on my workstation and get the following message.
TITLE: Microsoft SQL Server Management Studio
------------------------------
Failed to open connection dialog.
------------------------------
ADDITIONAL INFORMATION:
Could not load file or assembly 'SqlMgmt, Version=9.0.242.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) (mscorlib)
------------------------------
BUTTONS:
OK
------------------------------
I had SQl Express version installed previously and everything worked. I could connect to one server running SQL Express and a different server running full up SQL 2005 enterprise version.
I uninstalled All SQL express programs and installed tools from SQL 2005 developer.
I have rebooted, started the program directly (not using a link of any kind) and all attempts fail. After dismissing the error msg the tool opens and I can run queries agains the DB but the database engines and related tables do not show.
My work station is Windows XP with SP2 installed.
I have googled the problem extensively and tried solutions found but none have solved the problem.
Any help greatly appreciated.
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Apr 5, 2008
Hi to all, I want to study Sql server Service broker, have some questions1. What is the use of service broker ?2. Where this will use ? (With example)3. How to enable Service broker? Because i have sql server 2005 version but no folder like service broker.
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Aug 29, 2006
Im having a hard time understanding everything required to create a simple Service Broker example. Can someone please assist? Source code would be ideal, but if not "do this, do that" would even be helpful.
Thanks.
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Sep 8, 2006
I am trying to implement service broker. I send a message from my application code to the database to execute a specific stored procedure. How do i return the result set obtained by the execution of the stored procedure to the application.
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May 16, 2006
My service broker seems to be broken... The database was restored from another crashed server but i have tried the
ALTER AUTHORIZATION ON DATABASE::[SPYDERONTHEWEB] TO [SA];
The error i'm getting is
Service Broker needs to access the master key in the database 'SpyderOnTheWeb'. Error code 25. The master key has to exist and th service master key encryption is required.
Error: 28054, Severity 11, State: 1.
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Sep 26, 2006
Hi
It will be great to have an update on MS plans to solve the problem of using
Service Broker for remote users who sit behind the NAT.
Any news will be appreciated.
Leonid.
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Sep 11, 2006
Hello , I am trying to Implement distribution of the Stock Quotes over the LAN(only within the Network) and showing the live changing stock Quotes on the front end (in datagrid) installed at each clients desktop.I am receiving the Stock prices over the TCP / IP from the Stock Exchange. I am recieving atleast 10-15 messages per second over the TCP / IP from the Stock Exchange. Now i need to distribute this feed to Each connected client.
I tried doing it from TCP / IP , but in vein. Can we install the SQL 2005 Database Client Version on every client and use Service broker instaed of Live TCP / IP connections programmatically?
Ideally Can i dump the meesages from Stock Exchange in to each connected client's database locally and each front end application will keep a record of all the incomming messages.i.e Front end have a notification event , it will referesh the Datagrid in Front end accordingly...
ALL my front end application are made in dot net
Pls suggest if this above workflow will help me
Yugant
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Jan 8, 2008
Hi,
Is it possible to develop Service Broker in .Net 1.1 (VS 2003)? Currently I have a project developed in .Net 1.1 and I want to add a new method utilize the message queue concept (instead of using MSMQ, using Service Broker SQL 2005), although my DB is SQL server 2005.
Thanks,
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Jul 3, 2007
Hi all
if any one have any white paper or artical cover this issue kindly i need it
thanks , regards
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May 16, 2007
Hi,
I am looking at the Service Broker as a way to notify multiple clients that there has been data changed on a table in the shared database. These clients may or may not be online. When there is a change, the notification should fire off a query to refresh the clients local cache. Is this a situation where Service Broker would help me? Can multiple clients recieve the notification at different times ( some recieve while online, some recieve when they come back online)? Any help on this would be appreciated. It seems from what I read that the messages are pulled off the queue when a notification has taken place. Is this correct? If so, can I set it to behave differently?
Thanks,
-paul
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Sep 15, 2005
Let's assume the situation: we have Initiator and Target. Target is behind ISP's NAT and can't be published outside. So, when Initiator sends a message to Target, Target will not be able to establish a backward connection and will not send an acknowledge. Initiator will retry and retry...
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Apr 26, 2008
I have tried the following, each runs successfully with no error, but nothing is in the queues, what can be the issue?
CREATE MESSAGE TYPE SentMsgType
VALIDATION = WELL_FORMED_XML;
CREATE CONTRACT MQContract
(SentMsgType SENT BY ANY );
CREATE QUEUE SentQueue
WITH
STATUS=ON, RETENTION=OFF;
CREATE QUEUE ReceivedQueue
WITH
STATUS=ON, RETENTION=OFF;
CREATE SERVICE SentService ON QUEUE SentQueue
(MQContract);
CREATE SERVICE ReceivedService ON QUEUE ReceivedQueue
(MQContract);
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].[insertTrigger]
ON [dbo].[tblBBB] FOR INSERT AS
BEGIN
SET NOCOUNT ON;
DECLARE @handle uniqueidentifier
DECLARE @msgBody nvarchar(500)
select @msgBody = someString from inserted
BEGIN DIALOG CONVERSATION @handle
FROM SERVICE SentService
TO SERVICE 'ReceivedService', 'CURRENT DATABASE'
ON CONTRACT MQContract;
--Sends a message
SEND ON CONVERSATION @handle
MESSAGE TYPE SentMsgType
('<message>' + @msgBody + '</message>')
END CONVERSATION @handle WITH CLEANUP;
END
SELECT * FROM SentQueue
SELECT * FROM ReceivedQueue;
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Oct 16, 2006
How to create service broker and whic version is supported to create serveice broker.
can you plz exlain to create servece broker from the scratch
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Feb 16, 2007
Hi everyone,
Can anyone let meknow how do i enable a service broker. I am trying to enable a service broker for an issuetracker application to get change of events in my database. When ever i try enabling it using the ALTER DATABASE [ databse] set Enable_Broker. it takes abt more that 2 hrs or more but doesnt show as enabled.
Thanks in Advance,
Pawan Venugopal
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