Accessing shared database throws exception from one of 2 web roles

Setup:
Shared database
Main site and "admin site" each using separate web roles accessing shared database.
I had things working and running correctly until about 2 days ago. Then, only the "admin site" stopped working. I am using the same code to access the database across both sites but am getting the following exception when trying to access the
database in the admin site:
Message: Unable to open connection to "Microsoft SQL Server, provider V2.0.0.0 in framework .NET V2.0".
Stack Trace: at IBatisNet.DataMapper.SqlMapSession.OpenConnection(String connectionString) at IBatisNet.DataMapper.SqlMapSession.OpenConnection() at IBatisNet.DataMapper.Commands.DbCommandDecorator.System.Data.IDbCommand.ExecuteReader() at IBatisNet.DataMapper.MappedStatements.MappedStatement.RunQueryForObject[T](RequestScope
request, ISqlMapSession session, Object parameterObject, T resultObject) at IBatisNet.DataMapper.MappedStatements.MappedStatement.ExecuteQueryForObject[T](ISqlMapSession session, Object parameterObject, T resultObject) at IBatisNet.DataMapper.MappedStatements.MappedStatement.ExecuteQueryForObject[T](ISqlMapSession
session, Object parameterObject) at IBatisNet.DataMapper.SqlMapper.QueryForObject[T](String statementName, Object parameterObject) at AutoOffers.Persistence.SqlMapperWrapper.QueryForObject[T](String statementName, Object parameter) at AutoOffers.Persistence.Mappers.DbUserMapper.FindByEmailAddress(String
emailAddress) at AutoOffers.Persistence.Repositories.UserRepository.FindByEmailAddress(String emailAddress) at AutoOffers.Core.Domain.Services.Authentication.MembershipService.ValidateUser(String username, String password) at Admin.AutoOffers.Web.Controllers.HomeController.Login(LoginModel
model, String returnUrl) at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext,
IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41()
at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult
asyncResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult
asyncResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<>c__DisplayClass2a.<BeginInvokeAction>b__20() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult
asyncResult)
NOTE: I've tried to go to the v4 provider but get the same error (except with v4 in place of v4). I would suspect something amiss with my application if I didn't have a working one using shared code...though I'm still not ruling out that I'm doing
something wrong, just waiting for input from here.
Thanks in advance.

Hey there, and apologies for the lack of response. Are you still having this issue and still needing help? If so can you tell me a little more. Where is the application running (web/worker rolls)? what are the details on the SQL Database?
Thanks Guy

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To illustrate the difference, let's say we are creating a new user account and storing it in the database. For a checked exception, I might define DuplicateUserRegistration in case a user registers with an existing user name (a non-fatal error case that can be anticipated in system design). However, if the database was down, I would not throw SQLException (which is checked) but rather something like ResourceUnavailableError. This would be unchecked. A calling class (normally) will not be able to realistically handle a situation where the database is down, so why force that caller to either declare throws SQLException or catch SQLException for this instance?
- Saish

Throwing Exceptions from CacheStore

If I encounter an exception whilst persisting a cache's contents via a CacheStore implementation, how can I pass this expection up to the code that put the entry on the cache? If it doesn't make it into the database, I'd like to throw something to let the client code know.

Hi Mike,
Rethrowing synchronous CacheStore exceptions to the calling thread is now supported in Coherence 3.0. To do so, set the <tt>rollback-cachestore-failures</tt> configuration element in your <tt>read-write-backing-map-scheme</tt> or <tt>versioned-backing-map-scheme</tt> caching scheme to true.
Jason

Throwing Exceptions from a new Thread

Please help if you can.........
I have a very simple RMI server, that is used to run processes in seperate threads on a server machine, that are kicked off by a client GUI.
All works fine, except if the process can not be found, then the server generates an IOException. How can I get the thread to throw the exception back to the RMI Server, and then back to the GUI.
I have tried to throw Runtime Exceptions but that did not work, and I can not declare the run method of the thread to throw a remote exception......
Any help would be most appriciated...
G

/* the listener interface */
public interface ExceptionListener {
void exceptionOccured(Throwable t);
/* the runnable object */
public class WorkerThread implements Runnable {
List exceptionListenerList;
public void addExceptionListener(ExceptionListener l) {
    exceptionListenerList(l);
public void run() {
    try {
    // do the work, e.g some JDBC stuff
    } catch(Throwable t) {
      // error occured, first do some logging, then notify all listeners
      t.printStackTrace();
      for(i=0; i<exceptionListenerList; i++) {
        (ExceptionListener)exceptionListenerList.get(i).exceptionOccured(t);
/* this clas creates and & runs the thread; before doing this it
registers itself as an ExceptionListener to the runnable object */
public class ThreadStarter implements ExceptionListener {
public final void exceptionOccured(Throwable t) {
    // do whatever you want to do with the exception
public final void startThread() {
    WorkerThread wt = WorkerThread();
    wt.addExceptionListener(this);
    new Thread(wt).start();
}By the way: I "borrowed" the ExceptionListener / ExceptionCallback idea from the book "java thread programming - the authorative solution" by paul hyde.

Accessing shared database throws exception from one of 2 web roles

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