error-handling

Redirect in Application_Error redundant if using customErrors?

If I have a customErrors section in my Web.config that says to redirect to Error.html, then putting code in the Application_Error method in the Global.asax to redirect to Error.html is redundant is it not? Technically, I could bypass the Web.config by redirecting to a different page in the Application_Error method if I wanted to, but si...

Elmah is only logging 15 Errors

Hi, I've just starting looking at a site in place at work. They're using Elmah to log errors. It seems to be logging fine, but in the web interface, when I tell Elmah to show me 100 errors per page, it only shows the most recent 15. Then when I click on "Download Log" I only get shown 15 errors in the CSV. Anyone know how I can confi...

Magento hiding all errors page.

Magento Production version 1.2.1 store running on linux centos. I want to hide all error messages generating from Magento, or if error occurred then I want user to send to custom error page. I tried some solutions like putting Mage::setIsDeveloperMode(true); in index.php but it is not working properly, I even tried to set ini_set('d...

What is a good "Error Checking" Pattern (Java)?

I'll explain what I mean by input error checking. Say you have a function doSomething(x). If the function completes successfully doSomething does something and returns nothing. However, if there are errors I'd like to be notified. That is what I mean by error checking. I'm looking for, in general, the best way to check for errors. I'...

What is Linux for VMS DCL "ON ERROR"?

Using VMS DCL command scripts one can catch errors by using the on error command: $ on error then goto MyErrorHandler $ directory samiam.txt $ delete x.txt $ exit $MyErrorHandler: $ print "Something." How does one do this in Linuxland? In the example an error with directory or delete will cause control to go to MyErrorHandler. ...

Asp.Net error reporting with stacktrace

I have an Asp.Net web site set up to log errors using Log4Net (in global.asax) and redirect users to a custom error page (set up in web.config with: ). On this error page the users have the opportunity to write about what they did when the error occurred and post the description back to us to help fix the problem. My question is this: H...

best practice on precedence of variable declaration and error handling in C

is there an advantage in one of the following two approaches over the other? here it is first tested, whether fopen succeeds at all and then all the variable declarations take place, to ensure they are not carried out, since they mustn't have had to void func(void) { FILE *fd; if ((fd = fopen("blafoo", "+r")) == NULL ) { ...

Handle mysql restart in SQLAlchemy

My Pylons app uses local MySQL server via SQLAlchemy and python-MySQLdb. When the server is restarted, open pooled connections are apparently closed, but the application doesn't know about this and apparently when it tries to use such connection it receives "MySQL server has gone away": File '/usr/lib/pymodules/python2.6/sqlalchemy/engi...

Handling TclErrors in Python

In the following code I'll get the following error if I right click the window that pops up. Then go down to the very bottom entry widget then delete it's contents. It seems to be giving me a TclError. How do I go about handeling such an error? The Error Exception in Tkinter callback Traceback (most recent call last): File "C:\Pytho...

Appropriate use of die()?

Note: I am using output buffering. It's just wrapped in the head() and foot() functions. I create pages in my current PHP project by using the following template: <?php include 'bootstrap.php'; head(); ?> <!-- Page content here --> <?php foot(); ?> Is the following example an appropriate use of die()? Also, what sort of problems mi...

How can I test Windows Error Reporting?

My company participates in Windows Error Reporting via Winqual. We'd like to add some additional data to our crash reports, using WERRegisterMemoryBlock. Obviously we'd like to make sure this is working before we ship our next version. How can we test it? Is there a way to locally preview precisely what is going to be sent? Does thi...

What error handling should be used in VB.NET

What error handling should be used in VB.NET? Should one use the "On Error Goto ErrorHandler ... Exit Sub ErrHandler ... End Sub" pattern or should you use the "try { ... } catch { ... } finally { ... }" pattern? ...

VB.NET: question about "using" block

Consider the code: On Error Goto ErrorHandler Using sr As StreamReader = New StreamReader(OpenFile) str = sr.ReadToEnd sr.Close() End Using Exit Sub ErrorHandler: If there is an error inside the Using block how do you clean up the sr object? The sr object is not in scope in ErrHandler so sr.Close() cannot be called. Does ...

How to suppress error message details to general DNN Users

I have a DNN site (05.02.03) in test and nearing release into production and I would like to suppress the details of error messages (i.e. Null Reference Exception, and others) to general users (admins can still see the details). Debug is off in the web.config. By suppressing, I mean the only error message I want to display to the gener...

C++: Return NULL instead of struct

I have a struct Foo. In pseudocode: def FindFoo: foo = results of search foundFoo = true if a valid foo has been found return foo if foundFoo else someErrorCode How can I accomplish this in C++? Edited to remove numerous inaccuracies. ...

How to Make my application handle Errors for a few different scenarios?

so i have this code to extract a program to the temp directory then run it, the problem is it doesn't work perfectly on every computer (for some reason it hits a error or exception sometimes) string tempFolder = System.IO.Path.Combine(System.IO.Path.GetTempPath(), ""); System.Diagnostics.Process defrag1 = System.Diagnostics.Process.Sta...

strerror_r returns trash when I manually set errno during testing

During testing I have a mock object which sets errno = ETIMEDOUT; The object I'm testing sees the error and calls strerror_r to get back an error string: if (ret) { if (ret == EAI_SYSTEM) { char err[128]; strerror_r(errno, err, 128); err_string.assign(err); } else { err_string.assign(gai_strerror...

Log4j: Configuring FallbackErrorHandler with Properties

I use log4j in my project and wanted to use FallbackErrorHandler for Backup-Reasons. So, when I want to implement a FallbackErrorHandler, you have to use the DOMConfigurator and that for a XML-Configurationfile. But now, my customer doesn´t really like XML and looking for a way, he can configure the Logging-behaviour himself, I got the...

How to display a generic error page in Asp.Net MVC 2

I have the following in my base controller: protected override void OnException(ExceptionContext filterContext) { if (filterContext == null) { throw new ArgumentNullException("filterContext"); } // If custom errors are disabled, we need to let the normal ASP.NET exception handler ...

Server.TransferRequest returns blank page on specific server

I'm facing an issue that seems to be related to configuration. I have a webapplication based on MonoRail, where we utilize the routing feature from MonoRail. On the first request after the application has started, the routing isn't initialized. To circumvent this, I have the following code in Application_OnError(): public virtual void ...