Service Broker Used With ASP.NET Cache Invalidation
May 24, 2007
Hi,
I am not sure is this is .NET issue or a problem with the SQL Service broker so i hope you can either point me in the right direction or make suggestions to solve this problem.
I am using the SQL Server 2005 service broker to manage my caching in an ASP.NET application. The service broker is started with all require queues and permissions set up for the service account that connects to SQL Server. The application + broker service works fine in that if a table row change is made to a registered query the cache will invalidate in the web application.
The problem i am getting is errors appear in the application event log as well as the SQL logs and i am not sure what it means or why it is throwing an error even though the application works as it was designed.
Below are a couple of errors that are being logged
The query notification dialog on conversation handle '{ADC34B70-BD09-DC11-AFEA-0016E6539AEB}.' closed due to the following error: '<?xml version="1.0"?><Error xmlns="http://schemas.microsoft.com/SQL/ServiceBroker/Error"><Code>-8470</Code><Description>Remote service has been dropped.</Description></Error>'.
The query notification dialog on conversation handle '{E8642B09-BB09-DC11-AFEA-0016E6539AEB}.' closed due to the following error: '<?xml version="1.0"?><Error xmlns="http://schemas.microsoft.com/SQL/ServiceBroker/Error"><Code>-8490</Code><Description>Cannot find the remote service 'SqlQueryNotificationService-f19bedef-a9f9-46e1-8f37-1b573614bd26' because it does not exist.</Description></Error>'.
Service Broker needs to access the master key in the database 'test'. Error code:25. The master key has to exist and the service master key encryption is required.
Our development team is building an application using .net framework 2.0 and sql server 2005 developer edition. They are using service broker and sql cache dependency classes in their code and we are running into a problem where the database used for their application is growing alarmingly in size, ends up using a log of memory and finally drags the machine. The database machine is a developer class machine used for development purpose only.
After we did our research we found the following:
1. the tables created by the team do not increase in size.
2. the system tables created by sql server for service broker and sql dependency grows very big during their usage.
sys.sysconvgroup sys.sysdesend sys.sysdercv
The above three tables have the same number of records and they are equal in size for eg, at one point they were 1.5 gb each amounting to total 5 gb out which the actual user created tables, indexes, sp amount to only 500 Mb.
There were some post in other forums that suggested to use triggers to close the open conversations and also use END CONVERSATIONS in the code. We have used that solution also but doesn't seem to solve the problem.
Is there a definite solution from microsoft for this issue.
Anybody has any insight to this. Thanks for your help in advance.
Hello, Am wondering if someone can give me a pointer on where to start with a query i have. What i am trying to do is provide some sort of information to a user that data from a database has been changed. I know that you can cache a page and have output cache directive invalidate it next time it loads if changed but wondering if its poss to be told its changed without reload ( dont see how but never know) - even if not on that page. What im kinda thinking is something like the popup that outlook has when a new message arrives in in box. Is that just sending a new query? is there a table last modified function in sql? etc. This is for a web app in c#. Any help would be appreaciated. cheers
Hi I am using SQL Server cache invalidation with caching in my application. I have a master page and several other pages that are referring the master page. I have specified : <%@ OutputCache Duration="60" VaryByParam="*" SqlDependency="CommandNotification" %> on one of my content page.and I have included the System.Data.SqlClient.SqlDependency.Start(connectionstring) in my Application_Start.My web.config contains this section as well - <caching><sqlCacheDependency enabled="true"> <databases><add name="BizPartnerV4" connectionStringName="BizPartnerConnectionString"/> <add name="DirectBuyBeaverton" connectionStringName="DirectBuyBeavertonConnectionString"/></databases> </sqlCacheDependency> I</caching> have also run the aspnet_regsql utility to enable sqlcache dependency for the database. But my page is not taking the values from cache when the page is refreshed. Please help.
If I simply want a db table to have caching enabled and just care about the application getting that data from the cache instead of physically getting it from the table (no need for me to have a delegate for notification), there is no need for me to create a sqldependency object within my middle tier method associated with my command, correct? I have the sql cache enabled for a particular db table and have the following in my Application_Start event of the global.asox file (SqlDependency.Start “connectionstring�) Once I change something in the table, the cache is invalidated. That’s all I need, correct?
I'm trying to set enable SQL cache invalidation on a webpage, specifically on a a datasource that fills a GridView.
The website http://beta.asp.net/QUICKSTART/aspnet/doc/caching/SQLInvalidation.aspx makes it sound so very simple, and I have attempted to do all that it says, yet something just isn't right. The site says that the following needs to be done.
Queries must explicitly include column names in the SELECT statement. Using "SELECT *" results in a query that will not be registered with Sql Server 2005 query notifications. Table names in queries must include the ownername. For example, if you issue a query against the authors table in the pubs database, the query must reference the table as "dbo.authors". The security identity running the query must have rights to register queries for notification in Sql Server 2005. This right can be granted with the following T-SQL command: GRANT SUBSCRIBE QUERY NOTIFICATIONS TO username. The security identity running the query must also have rights to send query notifications from Sql Server 2005. This right can be granted with the following T-SQL command: GRANT SEND ON SERVICE::SqlQueryNotificationService TO username.
I've done items 1,2 & 3, but when I attempt to do item 4 I get the following result in TSql:
Msg 15151, Level 16, State 1, Line 1
Cannot find the service 'SqlQueryNotificationService', because it does not exist or you do not have permission.
My login account has sysadmin priviledges, so I'm guessing the latter part of the error doesn't apply to me. But what do I have to do to get SqlQueryNoticationService to exist?
I was wondering if SQL Cache Dependency would be in fact invalidated if: 1. it was created based on a procedure type command. 2. if the select statement retrieves the data from multiple database tables Any help would be more appreciated. I am stuck with the fact that none of the data bases on sql dependency is invalidated. I spent literally hours to understand what i am doing incorrectly.
I have used the notification-based cache invalidation with my web application, but how can I check it really works? I mena if the backend data didn't change , the data will come from cache not from the database?
<asp:SqlDataSource ID="SqlDataSource_WebInfo" runat="server" ConnectionString="<%$ ConnectionStrings:LocalSqlServer %>" SelectCommand="SELECT simplified, traditional FROM temp" ProviderName="System.Data.SqlClient" EnableCaching="True" SqlCacheDependency="CommandNotification"> </asp:SqlDataSource>
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?
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
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 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]'
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.
i have SSRS 2005 report the source data from oracle views i simply select * from the view and display data for a particular entity say empID using filter in the reports which is passed as parameter
the question is whether SSRS will cahe the data and for subsquent request it will take from Cache instead of going back to database even if i change the parameter say empID 1,2,3,
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.
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.
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.
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.
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.
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...
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.
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?
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...
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;
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
So SQLDependencies failed to do what I wanted them to do for my Cache Invalidating, so i'm going to humor another possibility for a half day - Triggers on my database table that communicate messages to my C# inside my ASP.NET App. Any advice on how to tap into a message queue with C#? I'm thinking that my messages could be 1 of about 100 different strings as far as what occurred on the Database Tables
We have a customer whos database just grows and grows. Not the customers own tables, but the:
sys.sysconvgroup sys.sysdesend sys.sysdercv
And these tables are linked to the Service Broker, and according to http://msdn2.microsoft.com/en-us/library/ms179503.aspx these tables exists in every database and are used by the Service Broker.
Now to my questions =)
HOW do I delete rows from these tables? How come these tables hust grows and grows, could it be any setting in the SQL 2005 Server or is it the customer who has programmed his application wrong?
I'm in the process of doing the initial research for the architecture of a large scale, transactional messages routing platform.
My initial design called for a series of MSMQ queues and Windows Services, written in C#, to process the messages in these queues. There will be incoming and outgoing queues, queues to store unroutable messages, etc.
My application will be routing many hundreds of thousands (and eventually millions) of messages per day. These message are very small (< 200 bytes each) and must be routed very quickly. (<1 second processing overhead per message for high priority messages.)
Using the term "routing" may be a bit misleading. The messages arrive via TCP socket connections. I will just need to take in a message, examine its intended destination, and send it to one of several outgoing socket connections, likely on different machines. Some messages require higher priority routing than others, but I don't need multi-hop routing or anything like that.
Of great concern to me is that there are absolutely no single points of failure in the system. Because of this I was considering using a combination of MSMQ and Windows Services in a Clustered environment.
Can the Service Broker provide me with this kind of functionality? If so, how well does it perform and scale? Is it a better choice for messaging applications that require high transactional throughput than MSMQ?
I'm just trying to get an idea of what products/services I should look into further.
i'm new with service broker and need to develop mail site to send mass email and decide to use sevice broker i'm make aqueue ,sevice and all function for run service borker and creat databasie mail profile
then test it but it's don't work please help me to fine what's the problem ?
thanks very mcuh for every one read my request and response to me thanks very mcuh
I am new to service broker and would like a little help please. I have a SP which gathers information from a collection of tables. Depending on the data gathered it may or may not begin a dialog conversation with a service broker queue. What i'm needing to know is should at the end of the SP once the required message has been sent should i end the conversation or not?
Hi, in the development env. I created the 2 dbs used by service brokers, the service brokers objects (messages, queues etc...).
The schema applied to tables and Activation SP is [dbo] and also the queues are executed as [dbo].
Everything works fine!Cool!
Now that we have to deploy evertything on production I would like that the service broker conversation runs using a specif user ( in this way when I log the Service Broker's errot in the event log I see this specific user and not my name)
Which kind of permission I have to give to this the user .. it is enought that I assign to it the schema DBO or I have to change the definition of my queues( execute as '[dbo]') or to create a new schema?
