I am using the following 2 Ninject assemblies in my web project.
Ninject.dll – Version 2.2.0.0
Ninject.Web.dll – Version 2.2.0.4
I have noticed that when I perform load testing on the server I am getting exceptions in my which are pointing to the Ninject
Message: Collection was modified; enumeration operation may not
execute. Stack Trace: at
System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource
resource) at
System.Collections.Generic.List1.Enumerator.MoveNextRare() at
System.Collections.Generic.List1.Enumerator.MoveNext() at
System.Linq.Enumerable.WhereSelectListIterator2.MoveNext() at
Ninject.Infrastructure.Language.ExtensionsForIEnumerableOfT.Map[T](IEnumerable1
series, Action`1 action) in
c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\Infrastructure\Language\ExtensionsForIEnumerableOfT.cs:line
22 at
Ninject.OnePerRequestModule.DeactivateInstancesForCurrentHttpRequest()
in
c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\OnePerRequestModule.cs:line
63 at Ninject.OnePerRequestModule.b__0(Object o, EventArgs
e) in
c:\Projects\Ninject\Maintenance2.2\ninject\src\Ninject\OnePerRequestModule.cs:line
36 at
System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step,
Boolean& completedSynchronously)
I did find this link from Remo Gloor dated May 11 2011 which says there is a new 2.4 version which has mentioned that the problem will be fixed 2.4 version. I am not sure if this version is released/available yet as I not able to find it.
Ninject Runtime Exception occuring frequently - System.InvalidOperationException: Collection was modified; enumeration operation may not execute
Does anybody know the solution to this resolve this Ninject error or know where can I find the 2.4 version?
This is the way I have done the mapping using Version 2.2.0.0 of Ninject
Bind<IMyEntities>().To<MyEntities>().InRequestScope().WithConstructorArgument("connectionString", ConfigurationManager.ConnectionStrings["MyEntities"].ConnectionString);
Using 3.0 I changed it to use
Bind<IMyEntities>().ToConstructor(x => new MyEntities());
or
Bind<IMyEntities>().ToConstructor(x => new MyEntities(ConfigurationManager.ConnectionStrings["MyEntities"].ConnectionString));
or
Bind<IMyEntities>().ToConstructor(x => new MyEntities(new EntityConnection (ConfigurationManager.ConnectionStrings["MyEntities"].ConnectionString)));
After trying all the above mentioned 3 different ways I am still getting the error. Every time the 3rd constructor is getting called somehow.
I am not sure what else to try. I have kind of invested a very good amount of time trying different things and still not coming to a conclusion/resolution.
If I am not able to find/resolve this problem somehow I will have to remove all the Ninjet references all together and go for some other DI's.
2.4 has become 3.0 because of some minor interface incompatibilities. See http://www.nuget.org/packages/Ninject/3.0.0-rc3
Related
I'm using MassTransit in a project with AmazonSQS and since I updated the packages to the latest version 7.3 I'm getting this exception
---> Amazon.SimpleNotificationService.AmazonSimpleNotificationServiceException: Rate exceeded
---> Amazon.Runtime.Internal.HttpErrorResponseException: Exception of type 'Amazon.Runtime.Internal.HttpErrorResponseException' was thrown.
Sometimes the exception is coming from SQS, the thing is when I was working with the version 6 I didn't have those exceptions.
This solution has three projects:
Two web applications (which produce the messages)
BackgroundService (which receive and process the messages)
I designed this system using CQRS pattern with several commands and for that reason it's creating 100 topics and I don't know if I need to consider some limits either from AWS or MassTransit
Someone can help me? Thanks
Our ASP.NET C# web application is used in the following environment
.NET Framework 4
Silverlight 4 / PivotViewer
IIS 7
Windows 2008
Visual Studio 2010 .NET IDE
C#
HTTPS ( SSL )
Our Silverlight 4 / PivotViewer controls are obviously embedded in
ASP.NET pages.
In rare cases we get the "Object reference not set to an instance of
an object. error when navigating around ASP.NET pages that host our
Silverlight 4 / PivotViewer modules on our standalone Windows 2008
server with IIS 7.
Also, there is number of very odd things about the error. First, it
occurs only sometimes on certain user computers. To elaborate, it
usually only occurs when a the user uses a computer that accesses our ASP.NET web application for the first time.
Moreover, once we clear the browser cache the error does Not occur
when navigating around ASP.NET pages that host our
Silverlight 4 / PivotViewer modules.
Another interesting aspect about the error is that it refers to
absolute path on my local development computer in the error stack
trace when it is in reality deployed to the standalone Windows 2008
server with IIS 7. That`s really strange because before I deploy to
the standalone Windows 2008 server with IIS 7, I ensure that all
configuration parameters in files such as web.config refer to the
standalone server environment. In other words, I remove any
references to configuration parameter values associated with my local
development computer.
Therefore, I am confused as to why it refers to absolute path on my
local development computer in the error stack trace.
It would be bad experience for the user to get the "Object reference
not set to an instance of an object.` while using the site. Also, it
would be bad user experience if we have to tell the user to clear
his/her browser cache everytime the error shows up.
Server Error in '/' Application.
Object reference not set to an instance of an object.
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.NullReferenceException: Object reference not
set to an instance of an object.
Source Error:
An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of
the exception can be identified using the exception stack trace below.
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
PivotServer.SectionBasedRelatedModules.SectionBasedPerlsViewer.tailorConfigurationDetailsOfPageElementsToFallInLineWithTutorialSelection()
in C:\VisualStudioWorkSpace\VisualCSharpProjects\PerlsPivot\PivotServer\SectionBasedRelatedModules\SectionBasedPerlsViewer.aspx.cs:160
PivotServer.SectionBasedRelatedModules.SectionBasedPerlsViewer.Page_Load(Object
sender, EventArgs e) in
C:\VisualStudioWorkSpace\VisualCSharpProjects\PerlsPivot\PivotServer\SectionBasedRelatedModules\SectionBasedPerlsViewer.aspx.cs:146
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp,
Object o, Object t, EventArgs e) +24
System.Web.UI.Control.LoadRecursive() +70
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
+3063
Version Information: Microsoft .NET Framework Version:4.0.30319;
ASP.NET Version:4.0.30319.272
I looked at line 160 which contains the following code:
String coursename = HttpContext.Current.Session["courseNameAssociatedWithLoggedInUser"].ToString();
Obviously, this tells us that there is no value for the variable "courseNameAssociatedWithLoggedInUser" in the HttpContext.Current.Session.
However, I took the same steps on another computer but it all ran smoothly.
Also, I am sure that I am giving a value to the HttpContext.Current.Session["courseNameAssociatedWithLoggedInUser"] as soon as the user logs in.
Does the HttpContext.Current.Session["courseNameAssociatedWithLoggedInUser"] get corrupted for some reason? If so, why, and how do we prevent it?
Should I be using Page.Session instead of HttpContext.Current.Session? Would that help?
"Obviously, this tells us that there is no value for the variable"courseNameAssociatedWithLoggedInUser" in the
HttpContext.Current.Session."
Not exactly... given your code...
String coursename = HttpContext.Current.Session["courseNameAssociatedWithLoggedInUser"].ToString();
... the following items could be causing this
HttpContext - unlikely
HttpContext.Current - more often than you would think, but would be reproducible
HttpContext.Current.Session["courseNameAssociatedWithLoggedInUser"]
To find out the specific item in that chain, you could do something like this (pseudo code)
function string GetCourseNameThingie()
{
if HttpContext is null
throw new Exception("HttpContext is null")
if HttpContext.Current is null
throw new Exception("HttpContext.Current is null")
if HttpContext.Current.Session["courseNameAssociatedWithLoggedInUser"] is null
throw new Exception("HttpContext.Current.Session["courseNameAssociatedWithLoggedInUser"]is null")
return HttpContext.Current.Session["courseNameAssociatedWithLoggedInUser"].ToString()
}
This would tell you specifically what was missing. As we have pointed out, it is more likely the value is either being cleared by another page or an error is occurring that is severe enough to destroy session for that user (Do you have a Application_Error or Session_End handler in Global.asax?).
You can also try wrapping the original statement in a try/catch and if an exception occurs, immediately check another session variable you assume to be still working. This will also tell you for sure whether the other variables are OK or not.
First, sorry for my grammar-English.
I had a similar issue with my .net applications and the reason was the idle time expiration.
There are four time expiration settings "(Yes 4)" and the recycling process of the application pools. I did the following
A) From Application pool: Open the advance setting and change the "Idle Time out". By default is 20 minutes.
Also, set the "Regular Time Interval" to 0. so it wont be recycled. I do not know why microsoft decided to default this to 1740 minutes. This is not a time out setting, it is a setting for always recycling the appPool after a period of time, so if your users are in the middle of something they will loose everything or having exceptions like that one you are having. Setting it to 0 will disable this.
B) Authentication Time Out. if you are using it, for example Form Authentication, then go to the authentication feature of your virtual directory app, right click in "Form Authentication" and select "Edit". Change the authentication cookie-time out.
C) ASP.NET Session State. in ISS, open the .net session state feature and change the session time-out. It is also by default 20 minutes.
D) asp.net form authentication time out. This was confusing for me at the beginning because I had already modified the cookie-time out of the form authentication in IIS (Step B). So I still had some problems, when I realised that I also need to change the web.config form authentication tag in order to add a time out attribute for changing the default 20 minutes.
My tag is looking like that: ...forms name=".ASPXFORMSAUTH" path="/" loginUrl="frmLogin.aspx" timeout="1740" protection="All" ...
We have developed a javascript mechanism that take the session state time out setting so we warm users that the system is about to auto log off due to inactivity.
It works beautiful now, Basically I have set all the time out settings to "1740" minutes, except the session state that we set to 30 minutes. So at the minute 29 of inactivity we show the user that the system will auto log off in a minute unless that they do some activity so the idle time is beginning from 0 again. Brilliant, now we do not have any problem with sessions.
Anyway guys, I have told you our experience and how we solve a similar problem that you are having now. However, the reason why I ended here is because we also want to eliminate the references to the absolute path on my local development computer at the moment of any exception.
We have not figured out why it is showing the absolute path. We have compiled our DLL assemblies in released mode, but this does not change anything. Have someone of you sort it out this issue?????
Thanks guys
Referencing a Session Within a ViewModel
You may not be using ASP.net MVC, but this would be useful if someone were to be looking for an answer.
I was in exactly the same situation except I would receive the null exception every time, whereas my colleague didn't at all, even though we were running exactly the same code.
Our mistake was to reference a session variable from a ViewModel, which is apparently bad practice. The code was changed so that the ViewModel received the session contents via the controller then set it as a property of the ViewModel. The session data (my example is called ProcessingWeek) would use this.ProcessingWeek, and not look directly at the httpcontext.current.session["ProcessingWeek"].
EventMatchResult Match = new EventMatchResult(
(ImportedEventModel)SessionData.ImportedEventModel,
ref db,
SessionData.ProcessingWeek);
...
public EventMatchResult(ImportedEventModel Event, ref CFModel db,
int ProcessingWeek)
{
this.db = db;
this.MatchedField = new List<PlayerMatchResult>();
this.ImportedEvent = Event;
this.ProcessingWeek = ProcessingWeek;
}
I'm not quite sure what's going on, but several issues are occurring on our website supported by Tridion 2011 SP1 that I can only think is being caused by the broker db
1, Loading the website results in the error with the Ambient Data Module:
[NullReferenceException: Object reference not set to an instance of an object.]
Tridion.ContentDelivery.AmbientData.HttpModule.OnRequestStart(Object sender, EventArgs e) +292
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +79
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +269
2, Audience manager profile synchronisation between the broker and subscription management databases is failing, receiving the following errors from the logs:
Error occurred while fetching a synchronization batch from the presentation system with url: [URL] Profilesync.aspx. Message class java.sql.SQLException No Data Access Object for AudienceManagerProfile java.sql.SQLException: No Data Access Object for AudienceManagerProfile
3, Publishing the website publication repeatedly fails at the transport stage, returning:
Transport failed: Could not transport tcm_0-10689-66560.Content.zip using HTTPS
I know these sound like several issues happening at once, but my site was running fine up until another web publication was added into blueprinting. Since then we've been getting these errors, and like to think it's all related to an issue with the broker db.
Anyone come across something like this?
UPDATE: Should also add the fact that dynamic linking has stopped working as well, which strengthens my belief there is an issue either connecting to or with the broker database
That's full of loaded questions, oh.. boy.. let's take one by one.
Did you check your license file is valid and did not expire recently.
I would rule the license file out first. If that's not the case then see below.
First, Adding publication blueprinting publication does not have any impact on CDA site. So, I would totally rule this out.
Second, Your site up and running until publication added.. This can't be happening. There should be some configurations changed/added on your web site. Sometimes, the configurations updated but the APPPool did not recycled so you don't see the impact. At later time, when the AppPool restarted/recycled you will notice the errors and might have the impression that the site is breaking all of sudden.
Did you double check your configs and dlls?
Are you able to connect to your database directly with broker user
id/password?
Any firewall changes happened recently, try connecting to DB from
CDA Server
For #3, I had this same problem... is it possible that adding the new publication caused the package size to increase from less than 30mb to more than 30mb? If so, check IIS Request Filtering >> Edit Feature Settings and look at Maximum allowed content length. This defaults to 30MB and for us increasing this size to something larger than our package size solved the Transport Failed error (since IIS would just reject our transports due to the size being greater than 30mb).
About issue #1: Could it be you have the Tridion.ContentDelivery.AmbientData.HttpModule configured in the Web.config, but are lacking the java installation? Do you have a cd_ambient_conf.xml in your config folder? And a cd_ambient.jar in the lib?
About issue # 2: you seem to be missing the audience manager DAOs (Data Access Objects). Do you have the following in your cd_storage_conf.xml?
<StorageBindings>
<Bundle src="AudienceManagerDAOBundle.xml"/>
</StorageBindings>
About issue # 3: do you have more information in the cd_transport.log or windows event viewer?
I agree with Ram that the added publication couldn't have caused this. It looks like your CD installation was changed somehow. Did you do an upgrade or something?
I have many servlets in a web applicaton; for some stange reason, only and only one of them always fails in initialization with the following error trace:-
00000045 ServletWrappe E SRVE0100E: Did not realize init() exception thrown by servlet MyServletX: java.lang.NullPointerException
at com.ibm.ws.webcontainer.WebAppPmiListener.onServletStartInit(WebAppPmiListener.java:120)
at com.ibm.ws.webcontainer.webapp.FireOnServletStartInit.fireEvent(WebAppEventSource.java:237)
at com.ibm.ws.webcontainer.util.EventListeners.fireEvent(EventListeners.java:48)
at com.ibm.ws.webcontainer.webapp.WebAppEventSource.onServletStartInit(WebAppEventSource.java:105)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.init(ServletWrapper.java:261)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:444)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:2841)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:220)
at com.ibm.ws.webcontainer.VirtualHost.handleRequest(VirtualHost.java:204)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1681)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:77)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:421)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:367)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:94)
at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:548)
at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:601)
at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:934)
at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1021)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1332)
I could not figure out if there is anything extra ordinary with this servlet. There is no init() method in this servlet and it extends HTTPServlet. Any idea what could be reason? I am using websphere server 6.0.x. How to get more debugging information in this case?
Well I don't know still cause of above error, but this is how it started working strangely:- i) Re-applied recommended fixes by IBM for my WAS version (especially there are IBM JDK upgrade related fix patches) ii) created a new profile of server iii) Install web application to new profile and it started working.
I don't think this is a product issue.
To debug this problem what i would suggest is to place a simple servlet (kind of Hello World) and deploy it to the server and see what happens.
initialization does not necessarily mean init() method alone.
If you have a static block in your servlet, if you have any variables that are initialized they would all be part of the initialization activity.
Look at the FFDC logs that were generated when this error occurred and that should provide you with clues.
As bkail mentioned, also ensure that yo have the latest fixpacks just to eliminate known problems with the product.
if the hello world servlet works, suggest you place hte servlet code here along with the SystemOut and System Err logs that correspond to this issue along with the relevant FFDC logs and i am sure most of us will be able to help you out with this
HTH
Manglu
After nearly 5 months with this configuration I am now getting a series of:
"A process serving application pool 'Classic .NET AppPool' suffered a fatal communication error with the Windows Process Activation Service. The process id was '1640'."
This leads to:
Application pool 'Classic .NET AppPool' is being automatically disabled due to a series of failures in the process(es) serving that application pool.
I cannot, for the life of me, figure out what changed to start causing this nor can I figure out how to possibly dig in deeper to find out what is causing it to fail.
I recently (2 weeks ago) started adding Entity Frameworks to my solution. Right before this happened I did get an "out of stack space" error due to a reported self-referenced call. I cannot find any calls like that in the code I wrote and am suspecting EF may have added a join in my simple (3 table) model that is wrong.
Any ideas on where to start looking? What would cause the AppPool to fail?
TIA
NOTE:
An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll
I have an outside object that calls this method to get a single record:
public static AutoNegotiationDetails GetAutoNegotiationByCompany(Guid companyId)
{
return RivWorks.Controller.Negotiation.GetAutoNegotiationByCompany(companyId);
}
That method calls into:
internal static AutoNegotiationDetails GetAutoNegotiationByCompany(Guid companyId)
{
var autoNeg = from a in _dbRiv.AutoNegotiationDetails where a.CompanyId == companyId select a;
var ret = autoNeg.FirstOrDefault();
return ret;
}
In stepping through it I can set a break point inside the first method, step into the second method, see the record populated, return to the first method then finally exit the method. At that point my IDE locks up for a few seconds until I get the StackOverflow error.
For a more accurate picture of the whole system:
Running WebOrb30 on the IIS machine.
In the VS IDE -> Attach to Process (INETINFO.exe)
Log into WebOrb30 -> Management Console -> Drill down to service entry point -> Enter CompanyID into input box -> Click Invoke
Hit break point in VS IDE -> (See above)
NOTE:
Looks like it may be caused by another issue in EF. See C# - Entity Framework - An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll for further clarification.
I may be that you have two apps/sites using one app pool, but the apps/sites are running different .net versions.
This might not be the case, but its the only similar recurring problem i've ever had with iis.
Because of a bug in my Entity Framework I was getting a cyclic call into one of my relationships. This was causing a stack overflow which was reported to WebOrb as a general error and WebOrb would halt causing the App Pool to crash. (I still don't quite understand all the specifics). When I rebuilt my EF Model without the relationships the behavior went away. (sigh/)
EF will be another question (or series of questions).