I have a workflow(xaml) in WF4 and there is a code activity which calls external module (e.g. mapper). All exceptions are catched in the first layer (e.g. service layer). Service layer executes workflow by calling Invoke on WorkflowInvoker. When mapper throws exception, this exception is catched in the service layer, but I lost stack trace from the mapper. The stack trace is comming from WorkflowInvoker.Invoke..
Is there any way how can I keep the stack trace from the mapper?
here is a schema of layers:
Service Layer -> Worklfow.Invoke -> (XAML: Code activity -> Mapper)
thanks
Check out http://neovolve.codeplex.com/SourceControl/changeset/view/87888#1420890
I run a "hack" in there to get the thrown exception to preserve the stack trace.
Related
I've a question regarding capture of "uncaught" exceptions, which appears with stack trace on System.err, circumventing logging configuration: All the other log messages appear properly formatted on System.out (JSON-formatted in my case). But this doesn't happen with Exceptions and stack traces "logged" to System.err!
I've recognized this to happen under at least two circumstances:
Asynchronous execution of tasks (HTTP requests in my case) via ExecutorService (as mentioned in "Scheduled Tasks" chapter). I've added #Retryable annotation to the method; but after all retries fail, "final" Exception thrown by last unsuccessful retry appears on System.err with its stack trace (the other ones thrown by earlier failed retries do not appear, seems they are caught by retry "mechanism" under the hood).
With Exceptions thrown by failed Health indicators (they are implemented by subclassing AbstractHealthIndicator).
I've tried implementing my own TaskExceptionHandler, replacing the default one (also mentioned in "Scheduled Tasks" chapter); and/or by adding System.setErr(System.out) in main method before building/setup of Micronaut Application Context. But nothing seems to help as my test cases attest.
Have I missed a chapter in Micronaut's documentation?
Thanks for any hints.
Regards
Christian
My wager is that Micronaut doesn't provide tools for setting a global uncaught exception handler because that's governed by the wider JRE. We've solved the problem in a few of our services with Thread.html#setDefaultUncaughtExceptionHandler by doing something like this at application startup:
Thread.setDefaultUncaughtExceptionHandler((t, e) -> logger.error("Uncaught exception", e));
I am running one MVC application where i found one exception in specific method. I will provide here complete details about it.
I am loading some third party grid control from view. to load it i used below code:
#{Html.RenderAction("MasterGridAction", "MyController");}
Now when i access this report from development then this view load and it hits this action method where i used some piece of code there it is throwing error, To catch the error i used try catch block in the method where in catch section i used below code to throw the actual exception like below:
catch (Exception ex)
{
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Capture(ex).Throw(); throw;
}
When exception get catched it sends this to the Application_Error method in global.asax page where i used below code to find out the actual exception like below:
void Application_Error(object sender, EventArgs e)
{
HttpServerUtility server = HttpContext.Current.Server;
if (server.GetLastError() != null)
{
Exception exception = server.GetLastError();
if (exception.GetBaseException() != null)
{
exception = exception.GetBaseException();
ExceptionType(server, exception);
}
else
{
ExceptionType(server, exception);
}
}
}
In this ExceptionType method i get the exception stack and log to the file using "Log4Net". After logging to the file i could see the exception in notepad like below:
Object reference not set to an instance of an object.
Source File: /MyController/MasterGridAction
Stack Trace:
at 3D.Controllers.MyController.MasterGridAction() in D:\MyUser\3D_MVC\Application\3D_OnlyRelease\3D\Controllers\MyController.cs:line 405
--- End of stack trace from previous location where exception was thrown ---
As we can see in above exception it is clearly shown the line number also where this exception get caught.
But once i host this application in IIS server and access the same page then i could see the logged file
There it shows exception like below:
Exception Message: Object reference not set to an instance of an object.
Stack Trace: at 3D.Controllers.MyController.MasterGridAction()
--- End of stack trace from previous location where exception was thrown ---
As you can see the logged exception of IIS server is not having much information when compare to other exception details.
Am i missing anything there to get the complete exception when host in IIS?
Please suggest.
As you can see the logged exception of IIS server is not having much information when compare to other exception details.
This could be because you don't include the PDB files in production.
It might not be a great idea to include them, since that way one can reverse engineer you app with more precision if they hack your server, but it is up to you to decide. I have seen organizations that include them in their production environments.
Try publishing and deploying on a test environment with and without the PDB files to verify this.
In .NET Core you can easily add a detailed exception page for developers:
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
This then gives you the exception details:
However, I'd like to include additional exception detail - for instance the SQL query attempted when the exception is a SqlException.
I can write my own exception handler from scratch with app.UseExceptionHandler, but I'd rather extend the built-in error. For instance by adding a tab to the results including additional info.
Is it possible to extend the information on this exception page?
What does 'segment' and 'progress' mean in that kind of exception
2) xlang/s engine event log entry: Uncaught exception (see the 'inner exception' below) has suspended an instance of service 'MainEventProcess.MainEvent(5b530a24-7336-4695-78ee-1d4ffdd9f210)'.
The service instance will remain suspended until administratively resumed or terminated.
If resumed the instance will continue from its last persisted state and may re-throw the same unexpected exception.
InstanceId: cf584087-a9d3-4be7-8da7-eae49fd4a108
Shape name: SendDeviationOut
ShapeId: dc5c3484-7955-4d75-b1f9-7e0ca8ecbc1e
Exception thrown from: segment 4, progress 8
Inner exception: Exception occurred when persisting state to the database.
Full details hereon MSDN:
Exception during execution of Orchestration
Can it be helpful in searching errors in code?
First, it's nothing you need to worry about and is not related to your app/code/implementation.
The two items you need to act on are SendDeviationOut and Exception occurred when persisting state to the database. You are most likely publishing a message and there are no Subscribers. This is the "no Subscribers found" error from the Orchestration engine.
Now, to answer your specific question, those are markers to blocks of C# code that XLang compiler generated from your Orchestration. Basically, every statement is organized into a group, segment, and each is executed and tracked individually, progress. If you open the File0.cs, you will see this in action.
Does anybody know how to print full stack trace on the Browser, when a Runtime Exception occurs in MULE..??
When a runtime Exception occurs, MULE throws a 500 Server Error to the client , but shows no details to the client. It prints the whole stack trace in Console or Log Files (like the following) :
Root Exception stack trace:
java.sql.SQLException: Invalid column name
at oracle.jdbc.driver.OracleStatement.getColumnIndex(OracleStatement.java:3677)
at oracle.jdbc.driver.OracleResultSetImpl.findColumn(OracleResultSetImpl.java:2749)
at oracle.jdbc.driver.OracleResultSet.getString(OracleResultSet.java:494)
+ 3 more (set debug level logging or '-Dmule.verbose.exceptions=true'
for everything)
Can i show the same stack Trace on the Browser (to the client)..??
And if possible , then also tell me how to switch ON or OFF printing of Stack Trace on Browser..??
(It may be possible that sometime in future , i dont want to show stack trace on browser)
Yes this is possible. I assume you are using a regular HTTP endpoint and this is a REST type service(?) If so, you can simply put a try/catch around the code causing the exception and return whatever text you want.
There are also exception strategies (http://www.mulesoft.org/documentation/display/MULE3USER/Error+Handling) for doing more sophisticated error handling, but it sounds like you are looking for the simple answer above.
If this doesn't answer your question, please provide more info about your mule config and the service that is raising the exception.
There is nothing out of the box in Mule to do that. You have to implement an exception handler that will format the stacktrace in the Message exception payload and return it to the caller.
In your case, the HTTP transport has a particularity that can be found in the HttpMessageReceiver code:
try
{
conn.writeResponse(processRequest(request));
}
catch (Exception e)
{
...
conn.writeResponse(buildFailureResponse(request.getRequestLine().getHttpVersion(), httpStatus, e.getMessage()));
This means that when an exception crops-up to the top level, the creation of the failure message response is not customizable: you get this pretty technical message back and that is all.
I see two options to solve your problem:
sub-class HttpMessageReceiver and make the response message customizable in your version,
drop the HTTP transport in favor of the Jetty one (look at the bookstore example) and customize the response error messages at the web container level.