Connected to website and keeping idle for 30 mins, then trying to access the entities I am getting the following error.
Entity framework An error occurred while executing the command definition. See the inner exception for details . Inner exception {“Invalid object name 'dbo.TableName'.”}
Sample Code
Static Class Azure
{
public static CrmEntities ConnectCustomerEntity()
{
CrmEntities customerEntity = null;
policy.ExecuteAction(() =>
{
try
{
var shardId = GetShardId();
customerEntity = new CrmEntities(ConnectionStringCustomerDB());
string federationCmdText = #"USE FEDERATION Customer_Federation(ShardId =" + shardId + ") WITH RESET, FILTERING=ON";
customerEntity.Connection.Open();
customerEntity.ExecuteStoreCommand(federationCmdText);
}
catch (Exception e)
{
customerEntity.Connection.Close();
SqlConnection.ClearAllPools();
//throw e;
}
});
return customerEntity;
}
public static CrmEntities DBConnect(CrmEntities _db)
{
try{
if (_db == null)
_db = Azure.ConnectCustomerEntity();
if ((_db.Connection.State == ConnectionState.Broken) || (_db.Connection.State == ConnectionState.Closed))
{
SqlConnection.ClearAllPools();
_db = Azure.ConnectCustomerEntity();
}
else
{ //This code is to find out any issues in connection pool database connection
string sqlCmdText = #"select top 1 Id from Project";
_db.ExecuteStoreCommand(sqlCmdText);
}
}
catch (Exception ex)
{
_db.Connection.Close();
SqlConnection.ClearAllPools();
_db = Azure.ConnectCustomerEntity();
}
return _db;
}
}
Mvc Controller. The following code I am gettting that exception, after 30 mins
public class FilterController : Controller
{
public ActionResult GetFilters(string entityName,string typeFilter)
{
_crmEntities=Azure.DBConnect(_db);
var query = _db.FilterFields.Where(filter => filter.TableId == tableId).ToList(); // Here I am getting that exception
}
}
I dont know, Why i m getting that exception. I tried all possibilities. Nothing helped. I really struck with this. If anybody knows please tell your views to come out from this exception
Thanks in Advance.
I think your session times out.
try to increase session timeout:
http://msdn.microsoft.com/en-us/library/system.web.sessionstate.httpsessionstate.timeout.aspx
Related
I am getting following error when accessing HttpContext.Session from static method placed in separate task:
Session has not been configured for this application or request.
I used this article to implement access to HttpContext outside the controller
From controller I invoke this static method that used to retrieve image data:
public static void CreateDummyGallery(Gallery gallery)
{
Logger.LogDebug(LogModule.Dummy, $"Starting gallery creation.");
Task.Factory.StartNew(() =>
{
try
{
List<DummyPicture> pictures;
using (var context = new MyzeumContext())
{
int top = 10;
pictures = context.DummyPictures.FromSql($"SELECT * FROM dummypictures ORDER BY RAND() LIMIT {top}").ToList();
}
Logger.LogDebug(LogModule.Dummy, $"Starting retrieving images.");
Parallel.ForEach(pictures, picture => {
using (WebClient client = new WebClient())
{
}
});
Logger.LogDebug(LogModule.Dummy, $"Done retrieving images.");
}
catch(Exception e)
{
Logger.LogError(LogModule.Server, e.Message, e);
}
});
}
The problem occurs in Logger.LogDebug() because this is where I access HttpContext:
public void LogDebug(LogModule module, string message, Exception stackTrace = null)
{
Log record = new Log();
record.Module = module;
record.ThreadId = Environment.CurrentManagedThreadId;
record.SessionId = HttpContextHelper.Current?.Session?.Id;
record.Message = message;
record.Logged = DateTime.UtcNow;
if(stackTrace != null)
{
record.Message += $" :{stackTrace.StackTrace}";
}
queue.Enqueue(record);
}
The problem 99% occurs in the first call inside task:
Logger.LogDebug(LogModule.Dummy, $"Starting retrieving images.");
BUT, right after application starts this whole task block works fine and does not throw any exception. Problem starts after following requests.
I am following this tutorial: https://cwiki.apache.org/confluence/display/CXF20DOC/JAXRS+Testing
But I get this error:
javax.naming.NoInitialContextException:Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
This is my local server class:
public class CXFLocalTransportTestSuite {
public static final Logger LOGGER = LogManager.getLogger();
public static final String ENDPOINT_ADDRESS = "local://service0";
private static Server server;
#BeforeClass
public static void initialize() throws Exception {
startServer();
}
private static void startServer() throws Exception {
JAXRSServerFactoryBean factory = new JAXRSServerFactoryBean();
factory.setAddress(ENDPOINT_ADDRESS);
List<Class<?>> resourceClasses = new ArrayList<Class<?>>();
resourceClasses.add(CommunicationWSRESTImpl.class);
factory.setResourceClasses(resourceClasses);
List<ResourceProvider> resourceProviders = new ArrayList<>();
resourceProviders.add(new SingletonResourceProvider(new CommunicationWSRESTImpl()));
factory.setResourceProviders(resourceProviders);
List<Object> providers = new ArrayList<Object>();
providers.add(new JacksonJaxbJsonProvider());
providers.add(new ApiOriginFilter());
providers.add(new AuthenticationFilter());
providers.add(new AuthorizationFilter());
factory.setProviders(providers);
server = factory.create();
server.start();
LOGGER.info("LOCAL TRANSPORT STARTED");
}
#AfterClass
public static void destroy() throws Exception {
server.stop();
server.destroy();
LOGGER.info("LOCAL TRANSPORT STOPPED");
}
}
And a client example:
public class CommunicationApiTest {
// [PUBLIC PROFILE]
// --------------------------------------------------------------------------------------------------------
#Test
public void getLinkedComponentsTest() {
// PATH. PARAM.
// ********************************************************************************************************
String userId = "1";
String componentInstance = "a3449197-cc72-49eb-bc14-5d43a80dfa80";
String portId = "00";
// ********************************************************************************************************
WebClient client = WebClient.create(CXFLocalTransportTestSuite.ENDPOINT_ADDRESS);
client.path("/communication/getLinkedComponents/{userId}-{componentInstance}-{portId}", userId, componentInstance, portId);
client.header("Authorization", "Bearer " + CXFLocalTransportTestSuite.authenticationTokenPublicProfile);
Response res = client.get();
if (null != res) {
assertEquals(StatusCode.SUCCESSFUL_OPERATION.getStatusCode(), res.getStatus());
assertNotNull(res.getEntity());
// VALID RESPONSE
// ********************************************************************************************************
assertEquals("> Modules has not been initialized for userID = 1", res.readEntity(GetLinksResult.class).getMessage());
// ********************************************************************************************************
}
}
}
Finally, this is the jax-rs implementation on the server side:
#Path("/communication")
public class CommunicationWSRESTImpl implements CommunicationWS {
#Path("/getLinkedComponents/{userId}-{componentInstance}-{portId}")
#GET
#Produces(MediaType.APPLICATION_JSON)
public Response getLinkedComponents(
#HeaderParam("Authorization") String accessToken,
#PathParam("userId") String userId,
#PathParam("componentInstance") String componentInstance,
#PathParam("portId") String portId) {
LOGGER.info("[CommunicationWSREST - getLinksComponents] userId: " + userId + " -- componentInstace: "
+ componentInstance + " -- portId: " + portId);
GetLinksResult result = new GetLinksResult();
result.setGotten(false);
result.setPortList(null);
if (userId != null && userId.compareTo("") != 0) {
if (componentInstance != null && componentInstance.compareTo("") != 0) {
if (portId != null && portId.compareTo("") != 0) {
TMM tmm = null;
javax.naming.Context initialContext;
try {
initialContext = new InitialContext();
tmm = (TMM) initialContext.lookup("java:app/cos/TMM");
result = tmm.calculateConnectedPorts(userId, componentInstance, portId);
} catch (Exception e) {
LOGGER.error(e);
result.setMessage("> Internal Server Error");
return Response.status(Status.INTERNAL_SERVER_ERROR).entity(result).build();
}
} else {
LOGGER.error("Not found or Empty Port Error");
result.setMessage("> Not found or Empty Port Error");
return Response.status(Status.NOT_FOUND).entity(result).build();
}
} else {
LOGGER.error("Not found or Empty Component Instance Error");
result.setMessage("> Not found or Empty Component Instance Error");
return Response.status(Status.NOT_FOUND).entity(result).build();
}
} else {
LOGGER.error("Not found or Empty userid Error");
result.setMessage("> Not found or Empty username Error");
return Response.status(Status.NOT_FOUND).entity(result).build();
}
return Response.ok(result).build();
}
}
Maybe the problem is the local transport is not correctly configured what launches the exception because of the lookup (see: server side):
TMM tmm = null;
javax.naming.Context initialContext;
try {
initialContext = new InitialContext();
tmm = (TMM) initialContext.lookup("java:app/cos/TMM");
result = tmm.calculateConnectedPorts(userId, componentInstance, portId);
} catch (Exception e) {
..
The problem is most likely because you are running your test in a Java SE environment that is not configured with a JNDI server. If you run your test as part of a WAR inside a Java EE app server, this would probably work just fine.
So you might need to either run your unit test inside an app server or you could try mocking a JNDI server like what is described here: http://en.newinstance.it/2009/03/27/mocking-jndi/#
Hope this helps,
Andy
I've been writing an application using MVC4 and EF5.x, and using ELMAH for logging exceptions for review. We recently released the application, and as expected the ELMAH log filled up with several dozen exceptions. Great (and not)! The problem is that one of those exceptions is
System.Data.Entity.Validation.DbEntityValidationException
Validation failed for one or more entities.
See 'EntityValidationErrors' property for more details.
Of course, there's no way to see the EntityValidationErrors property for more details and the stack trace wraps up to my SubmitChanges()
I know ELMAH has the capability of allowing us to raise our own exceptions, and in some way customize what gets logged and how. Unfortunately, I'm still very new to ELMAH and MVC and a Google search didn't turn up anything relevant. I did find a blog article on logging EntityValidationErrors, and the author specifically mentioned that he would post how to do so in ELMAH but that was posted in September of 2012 and I didn't see anything since then.
Any help would be greatly appreciated!
Probably the best thing to do in this case would be to wrap your context.SaveChanges(); call in a try...catch block and then log the individual items from the ValidationExceptions. Something like the following should get you started:
try
{
context.SaveChanges();
}
catch (DbEntityValidationException ve)
{
var error = ve.EntityValidationErrors.First().ValidationErrors.First();
var msg = String.Format("Validation Error :: {0} - {1}",
error.PropertyName, error.ErrorMessage);
var elmahException = new Exception(msg);
Elmah.ErrorSignal.FromCurrentContext().Raise(elmahException);
}
How about this extension method based on the above..
public static void SaveChangesWithBetterValidityException(this DbContext context)
{
try
{
context.SaveChanges();
}
catch (DbEntityValidationException ve)
{
var errors = new List<string>();
foreach (var e in ve.EntityValidationErrors)
{
errors.AddRange(e.ValidationErrors.Select(e2 => string.Join("Validation Error :: ", e2.PropertyName, " : ", e2.ErrorMessage)));
}
var error = string.Join("\r\n", errors);
var betterException = new Exception(error, ve);
throw betterException;
}
}
Elmah will then have a much better exception in it's log
I added the following to my Global.asax.cs in order to forward all DbEntityValidationException exceptions to Elmah across my MVC application:
private void ElmahEntityValidationException()
{
var dbEntityValidationException = Server.GetLastError() as DbEntityValidationException;
if (dbEntityValidationException != null)
{
var errors = new List<string>();
foreach (var entityError in dbEntityValidationException.EntityValidationErrors)
{
errors.AddRange(entityError.ValidationErrors.Select(e2 => string.Join("Validation Error :: ", e2.PropertyName, " : ", e2.ErrorMessage)));
}
var error = string.Join("\r\n", errors);
var betterException = new Exception(error, dbEntityValidationException);
Elmah.ErrorSignal.FromCurrentContext().Raise(betterException);
}
}
protected void Application_Error(object sender, EventArgs e)
{
ElmahEntityValidationException();
}
Some of this code was reused from #Paige Cook's and #Original10's posts.
Re-throwing as per the code below is not perfect (although I don't mind resetting the call stack here, as Elmah's logged details of the address posted to will show me what lead to the exception) and you will have to work out your own security implications, but this is fairly concise & meets my needs:
try
{
return base.SaveChanges();
}
catch (DbEntityValidationException e)
{
var de = new DetailedEntityValidationException(e);
throw de;
}
public class DetailedEntityValidationException : Exception
{
public DetailedEntityValidationException(DbEntityValidationException ve)
: base(ve.Message + ":\r\n\t-" + string.Join(new string('-',20) + "\r\n\t-", ve.EntityValidationErrors.Select(ev=>string.Join("\r\n\t-",ev.ValidationErrors.Select(e=>e.ErrorMessage)))))
{}
}
Here is my implementation for Global Web API solution for Elmah and EF Validation errors:
public class ElmahHandleWebApiErrorAttribute : ExceptionFilterAttribute
{
public override void OnException(HttpActionExecutedContext context)
{
var e = context.Exception;
// Try parse as entity error (i'm not sure of performance implications here)
var efValidationError = e as DbEntityValidationException;
if (efValidationError == null)
{
RaiseErrorSignal(e);
}
else
{
RaiseEntityFrameWorkValidationErrorSignal(efValidationError);
}
}
private static bool RaiseErrorSignal(Exception e)
{
var context = HttpContext.Current;
if (context == null)
return false;
var signal = ErrorSignal.FromContext(context);
if (signal == null)
return false;
signal.Raise(e, context);
return true;
}
private static bool RaiseEntityFrameWorkValidationErrorSignal(DbEntityValidationException e)
{
var context = HttpContext.Current;
if (context == null)
return false;
var signal = ErrorSignal.FromContext(context);
if (signal == null)
return false;
//Taken from post above
var errors = new List<string>();
foreach (var entityError in e.EntityValidationErrors)
{
errors.AddRange(entityError.ValidationErrors.Select(e2 => string.Join("Validation Error :: ", e2.PropertyName, " : ", e2.ErrorMessage)));
}
var error = string.Join("\r\n", errors);
var betterException = new Exception(error, e);
signal.Raise(betterException, context);
return true;
}
}
and then I register the attribute in the WebApiConfig.cs file under App_Start
config.Filters.Add(new ElmahHandleWebApiErrorAttribute());
I am using Tomcat 7, Microsoft SQL Server 2008 RC2 and JTDS driver
I am actually using C3P0 as well to try and solve this problem, but it makes no difference at all. I was using Microsoft's driver but it caused me other problems (the requested operation is not supported on forward only result sets)
I get the following error, always at the same point. I have successfully run other queries before getting to this point:
java.sql.SQLException: Invalid state, the ResultSet object is closed.
at
net.sourceforge.jtds.jdbc.JtdsResultSet.checkOpen(JtdsResultSet.java:287)
at
net.sourceforge.jtds.jdbc.JtdsResultSet.findColumn(JtdsResultSet.java:943)
at
net.sourceforge.jtds.jdbc.JtdsResultSet.getInt(JtdsResultSet.java:968)
at
com.mchange.v2.c3p0.impl.NewProxyResultSet.getInt(NewProxyResultSet.java:2573)
at com.tt.web.WebPosition.createPosition(WebPosition.java:863)
The code is as follows:
public static List getListPositions(String query) {
Connection con = null;
Statement stmt = null;
ResultSet rs = null;
List list = null;
try { //execute the sql query and create the resultSet
con = DBConnection.getInstance().getConnection();
stmt = con.createStatement();
rs = stmt.executeQuery(query);
while(rs.next()) {
if(rs.isFirst()) {
list = new ArrayList();
}
WebPosition webPos = null;
webPos = new WebPosition(rs);
list.add(webPos);
}
} catch (java.sql.SQLException e) {
System.out.println("SQLException in getListPositions");
System.out.print(query);
Log.getInstance().write(query);
Log.getInstance().write(e.toString());
} catch (Exception ex) {
System.out.print(ex);
ex.printStackTrace();
Log.getInstance().write(ex.toString());
} finally {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
Log.getInstance().write(e.toString());
}
}
if (stmt != null) {
try {
stmt.close();
} catch (SQLException e) {
Log.getInstance().write(e.toString());
}
}
DBConnection.getInstance().returnConnection(con);
}
return list;
}
public WebPosition(ResultSet rs) {
createPosition( rs);
}
public void createPosition(ResultSet rs) {
try {
this.setCurrentDate4Excel(rs.getString("SYSDATE_4_EXCEL"));
this.setExerciseType(rs.getInt("EXERCISE_STYLE_CD"));
...
The code fails in between the above two lines.
I am at a loss to explain why the Result set would be closed in the middle of a function (i.e. it would retrieve rs.getString("SYSDATE_4_EXCEL") but then fail with the error posted at the line rs.getInt("EXERCISE_STYLE_CD"))
Does anyone have any ideas? I imagine that it is some kind of memory issue, and that the connection is automatically closed after a certain amount of data, but I am not sure how to fix this. I tried increasing the heapsize for the JVM.
In one of the WCF tutorials, I saw the following sample code:
Dim service as ...(a WCF service )
try
..
service.close()
catch ex as Exception()
...
service.abort()
end try
Is this the correct way to ensure that resources (i.e. connections) are released even under error conditions?
See Indisposable: WCF Gotcha #1*, where he comes up with a convenient wrapper method:
public delegate void UseServiceDelegate<T>(T proxy);
public static class Service<T>
{
public static ChannelFactory<T> _channelFactory = new ChannelFactory<T>("");
public static void Use(UseServiceDelegate<T> codeBlock)
{
var proxy = (IClientChannel)_channelFactory.CreateChannel();
var success = false;
try
{
codeBlock((T)proxy);
proxy.Close();
success = true;
}
finally
{
if (!success)
{
proxy.Abort();
}
}
}
}
Usage:
Service<IOrderService>.Use(
orderService =>
{
orderService.PlaceOrder(request);
});
* Link removed as it appears to be malicious.
I've had good luck with this model:
Dim service As New MyService()
Dim closed As Boolean = False
Try
service.Open()
If Not service.State = ServiceModel.CommunicationState.Opened Then
''Handle a not-opened state here
End If
service.MyMethod()
service.Close()
closed = true
Catch ex As Exception
''Handle errors here
Finally
If Not closed Then
service.Abort()
End If
End Try
service = Nothing
You've got the general idea correct. I've used the following extension method to keep the lines of repetitive code to a minimum.
public static class ICommunicationObjectExtensions
{
public static void SafelyCloseConnection(this ICommunicationObject objectToClose)
{
bool success = false;
try
{
objectToClose.Close();
success = true;
}
finally
{
if (!success)
{
objectToClose.Abort();
}
}
}
}
Example of code using this extension method:
HelloWorldServiceClient client = new HelloWorldServiceClient();
HelloWorldDataContract dc = new HelloWorldDataContract();
try
{
client.Open();
dc = client.SayHello();
} // Add catch blocks here for anything you want to handle.
finally
{
client.SafelyCloseConnection();
}
Of course this is C#, but I think that should still be of help.
If you use a client side cache, you might consider using Expression Trees (see http://thegrenade.blogspot.com/2009/07/using-expression-trees-for-more-elegant.html):
private static TEntity GetItem<TProxy, TEntity, TIdentity>(Expression<Func<TProxy, TIdentity, TEntity>> expression, TProxy proxy, TIdentity id)
where TEntity : class
where TProxy : ICommunicationObject
{
TEntity item = Cache.GetItem<TEntity, TIdentity>(id);
if (item == null)
{
try
{
var originalDelegate = expression.Compile();
item = originalDelegate.Invoke(proxy, id);
}
finally
{
try{ proxy.Close(); }
finally { proxy.Abort(); }
}
Cache.AddItem<TEntity, TIdentity>(item);
}
return item;
}
Usage:
Product p = GetItem((client, identifier) => client.GetProduct(identifier), new CatalogServiceClient(), 123);