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• Artificially create a connection timeout error

  - by Mark Ingram

  I've had a bug in our software that occurs when I receive a connection timeout. These errors are very rare (usually when my connection gets dropped by our internal network). How can I generate this kind of effect artificially so I can test our software? If it matters the app is written in C++/MFC using CAsyncSocket classes. Edit: I've tried using a non-existant host, and I get the socket error: WSAEINVAL (10022) Invalid argument My next attempt was to use Alexander's suggestion of connecting to a different port, e.g. 81 (on my own server though). That worked great. Exactly the same as a dropped connection (60 second wait, then error). Thank you!

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• stripe payment issue ruby on rails

  - by Admir Huric

  So I have made a stripe payment option in my app. When I click the button pay now, it shows me that the payment is successful. and when I go to my stripe account and go to stripe-test and check logs, I can see my test payment with the code 200 OK. But this payment doesn't show in stripe-test events, or in stripe-test payments. Are the payments from logs processed the next day or am I doing something wrong? def charge Stripe.api_key = "some_test_api_key" customer = Stripe::Customer.retrieve(stripe_customer_id) if stripe_customer_id.nil? Stripe::Charge.create( :amount => 2500, :currency => "cad", :customer => stripe_customer_id, :description => "Usage charges for #{name}" ) end rescue Stripe::StripeError => e logger.error "Stripe Error: " + e.message errors.add :base, "Unable to process charge. #{e.message}." false end

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• Spring Transaction Manager

  - by cedric

  Hi. I have a j2ee application running on spring framework. I am implementing a transaction manager with AOP. It works fine. When an exception occurs in my method it is detected by my AOP configuration and rolls back the changes in the DB. But the problem is the code where you expect the error should not be surrounded with try-catch. When I suround it with try-catch it won't roll-back. But I need to do some stuffs like logging whenever there are errors and the only place I can think of placing it is in the catch block.

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• How to convert a C++ program that uses CUDA into MEX

  - by Harold Wellington Graves

  For work, I am converting the Image Denoising program that comes with the CUDA SDK into a MATLAB program. As far as I know, I have made all the necessary changes required by MATLAB, but when I try to call mex on it, MATLAB returns a bunch of linkage errors that I have no idea how to fix. If anyone has any suggestions on what I might be doing wrong, I would greatly appreciate it. The command I am giving MATLAB is: mex imageDenoisingGL.cpp -I..\..\common\inc -IC:\CUDA\include -L..\..\common\lib -lglut32 And the output from MATLAB is a bunch of these: imageDenoisingGL.obj : error LNK2019: unresolved external symbol __imp__cutCheckCmdLineFlag@12 referenced in function "void __cdecl __cutilExit(int,char * *)" (?__cutilExit@@YAXHPAPAD@Z) I am running: Windows XP x32 Visual Studio 2005 MATLAB 2007a

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• Nested mysql select statements

  - by Jimmy Kamau

  I have a query as below: $sult = mysql_query("select * from stories where `categ` = 'businessnews' and `stryid`='".mysql_query("SELECT * FROM comments WHERE `comto`='".mysql_query("select * from stories where `categ` ='businessnews'")." ORDER BY COUNT(comto) DESC")."' LIMIT 3") or die(mysql_error()); while($ow=mysql_fetch_array($sult)){ The code above should return the top 3 'stories' with the most comments {count(comto)}. The comments are stored in a different table from the stories. The code above does not return any values and doesn't show any errors. Could someone please help?

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• WPF: Binding items added to UserControl's exposed children

  - by Brian

  I have a user control that allows items to be added to it by exposing a Grid's Children property. Any control I add shows up fine but when I try to bind a property on the added item to a control in the main window nothing happens (example): <TextBox Name="txtTest" Text="Success!" /> <mycontrols:CustomUserControl.ExposedGridChildren> <TextBox Text="{Binding ElementName=txtTest, Path=Text, FallbackValue=fail}"/> </mycontrols:CustomUserControl.ExposedGridChildren> This example always results in the TextBox's text showing "fail". Here is how I'm exposing the children in the user control: public UIElementCollection ExposedGridChildren { get { return grdContainer.Children; } } Any thoughts? Is it a scope issue? I know I can't name the elements I add to the children because of scope errors. Thanks, Brian.

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• Copying a java text file into a String.

  - by Deepak Konidena

  Hi, I run into the following errors when i try to store a large file into a string. Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:515) at java.lang.StringBuffer.append(StringBuffer.java:306) at rdr2str.ReaderToString.main(ReaderToString.java:52) As is evident, i am running out of heap space. Basically my pgm looks like something like this. FileReader fr = new FileReader(<filepath>); sb = new StringBuffer(); char[] b = new char[BLKSIZ]; while ((n = fr.read(b)) > 0) sb.append(b, 0, n); fileString = sb.toString(); Can someone suggest me why i am running into heap space error? Thanks.

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• What to monitor on MSSQL Server

  - by user361434

  Hi all I have been asked to monitor MSSQL Server (2005 & 2008) and am wondering what are good metrics to look at? I can access WMI counters but am slightly lost as to how much depth is going to be useful. Currently I have on my list: user connections logins per second latch waits per second total latch wait time dead locks per second errors per second Log and data file sizes I am looking to be able to monitor values that will indicate a degradation of performance on the machine or a potential serious issue. To this end I am also wondering at what values some of these things would be considered normal vs problematic? As I reckon it would probably be a really good question to have answered for the general community I thought i'd court some of you DBA experts out there (I am certainly not one of them!) Apologies if a rather open ended question. Ry

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• Chain call in clojure?

  - by Konrad Garus

  I'm trying to implement sieve of Eratosthenes in Clojure. One approach I would like to test is this: Get range (2 3 4 5 6 ... N) For 2 <= i <= N Pass my range through filter that removes multiplies of i For i+1th iteration, use result of the previous filtering I know I could do it with loop/recur, but this is causing stack overflow errors (for some reason tail call optimization is not applied). How can I do it iteratively? I mean invoking N calls to the same routine, passing result of ith iteration to i+1th.

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• Why won't this SQL CAST work?

  - by Kev

  I have a nvarchar(50) column in a SQL Server 2000 table defined as follows: TaskID nvarchar(50) NULL I need to fill this column with some random SQL Unique Identifiers (I am unable to change the column type to uniqueidentifier). I tried this: UPDATE TaskData SET TaskID = CAST(NEWID() AS nvarchar) but I got the following error: Msg 8115, Level 16, State 2, Line 1 Arithmetic overflow error converting expression to data type nvarchar. I also tried: UPDATE TaskData SET TaskID = CAST(NEWID() AS nvarchar(50)) but then got this error: Msg 8152, Level 16, State 6, Line 1 String or binary data would be truncated. I don't understand why this doesn't work but this does: DECLARE @TaskID nvarchar(50) SET @TaskID = CAST(NEW() AS nvarchar(50)) I also tried CONVERT(nvarchar, NEWID()) and CONVERT(nvarchar(50), NEWID()) but got the same errors.

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• WCF Callback Contract Fiddler Debugging

  - by DavyMac23

  I'm trying to debug a WCF self-hosted service utilizing callbacks. Every 1/2 I make a callback to a SL3 app to display the latest changes (yes, there are tons of changes every 1/2 second). There are 3 services, one has new data every 1/2 second, one has new data every second, and another has new data every hour. I've set all of my timeouts, Send, Receive, Open and Close to 2 days 23 hours and 23 minutes, but I still get time out errors on the service side when I go to issue the callback. I'm using Fiddler and I notice that my service that has new data every hour is still showing up every 10 seconds. Fiddlier shows a Body length of -1, then 10 seconds later it changes to 0 and the response is HTTP 200, but the overall elapsed time is 10 seconds. What's going on here?

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• Git push works for gitosis but not my own repo (Permission denied)

  - by Mickey Cheong

  Hi, I follow this exact guide to setup my GIT server: http://blog.agdunn.net/?p=277 I tried it before and it works. However, this time, when I provision a new server, it doesn't. I followed the exact steps and I provision it 3 times. It still failed. I get this errors: Permission denied (publickey). fatal: The remote end hung up unexpectedly However, this only happen when I try to add a remote origin and push my new repo. If I do a git push on my gitosis, it works perfectly fine. I tried look into the IP and all the permission, I can't figure out what went wrong. Another test I did was, I went into .ssh/known_hosts/ and delete the IP entry. When I tried to do a git push for gitosis-admin, it will prompt if I wanted to allow this IP. However, this prompt doesn't appear for my new repo. Any help will be great appreciated. Thanks, Mickey

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• Is there a decent JSON editor around?

  - by al4nis

  I'm looking for a JSON editor that is able to do syntax checking and outline view. Browser-based editors are not an option as they are clumsy for editing lots of local files. Eclipse plug-in would be ideal, but I would be happy with anything that works. I found only two so far, those in Aptana Studio Pro and Spket IDE (both available as plug-ins for Eclipse). While they have decent outline views, their syntax checking doesn't catch most of the common errors (like missing commas or braces) which makes them almost useless.

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• Jquery - add server control

  - by superexsl

  Hey, I'm having trouble with a custom control and adding it dynamically using JQuery. I've got the following code: $('.custom_control_div').replaceWith( "<div><cc:mycustomcontrol id='cControl' ></cc:mycustomcontrol></div>" ); This doesn't throw any errors, but doesn't work because I need to use runat=server in my custom control. However, if I add runat=server in the code above, no javascript is executed on the page (and jqueryUI no longer works). The custom control works fine when I add it directly to the page from design-time. Is there a way to add a control, with runat=server using Jquery? Thanks

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• Maven2 compiles my tests, but doesn't run them

  - by Vincenzo

  I have a simple Maven2 project with tests written for TestNG. When I say mvn test Maven2 compiles my test, but don't run them. I already checked this page: http://maven.apache.org/general.html#test-property-name. This is not my case. Anybody can help? My directory structure: pom.xml src main java com ... test java com ... target classes <— .class files go there test-classes <— .class files with tests go there This is what I see if I run mvn -X test (end of the log): ... [INFO] Surefire report directory: <mydir>/target/surefire-reports Forking command line: /bin/sh -c cd <mydir> && /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home/bin/java -jar /var/folders/+j/+jAx0g2xGA8-Ns9lWNOWgk+++TM/-Tmp-/surefirebooter7645642850235508331.jar /var/folders/+j/+jAx0g2xGA8-Ns9lWNOWgk+++TM/-Tmp-/surefire4544000548243268568tmp /var/folders/+j/+jAx0g2xGA8-Ns9lWNOWgk+++TM/-Tmp-/surefire7481499683857473873tmp ------------------------------------------------------- T E S T S ------------------------------------------------------- Running TestSuite Tests run: 0, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.191 sec

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• Do all header("Location: member.php?id=$username") have to be the first thing in a script? (PHP)

  - by ggfan

  I know in the Manuel it says that the header has to be the first thing in a script, but how come I see some codes where header("Location: member.php?id=$username") is in a if-statement? Ex: //a bunch of codes above if($result!="0"){ // authenication correct lets login $_SESSION["password"] = $password;; $_SESSION["username"] = $username; header("Location: member.php?id=$username"); } else { echo "Wrong username or password. Please try again!"; } But when I do this, it sometimes would/won't throw an error. How do I allow the header (); to be used in a script without any errors? I want to redirect the user back to the login if they click "no" and to the homepage if they click "yes".

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• IIS 6 session timing out a lot quicker than expected

  - by Echiban

  I am working with an web application that has its sessions timing out a lot quicker than expected. We expected a timeout of 15 minutes but it's timing out at 3-4 minutes. Info about environment: IIS6 classic ASP / COM+ app timeout OK on current PROD, much quicker in dev / QA environments We already disabled app pool recycling, and even put IIS in isolation mode - no effect HTTP err log doesn't display any lines when session times out We've done a close comparison of PROD and DEV / QA environments, and given we use virtual machines on all of them, settings should be preserved. I tried to find IIS blog notes from David Wang but many of them now have HTTP 404 errors, and I don't know what else to do. Please help! At the very least, is there a way to get IIS to log every time a session expires? At the very least some means of logging / debugging IIS would be useful. Thanks in advance.

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• Removing all installed Gems and starting over

  - by Dave Long

  I recently started learning Ruby and Ruby on Rails, and have watched a plethora of getting started materials. I have been finding lately that I keep getting errors where gems won't install or they will be installed but they can't be used for some reason, and I have decided that I want to remove everything down to once again just having Ruby installed and start over with the installation. One training video had me install most of my gems with RVM, so I don't know if that changes anything. So in short my question is "How to I get rid of RVM, Rubygems, and all installed Gems so that I can start over with just Ruby?" Edit: I am on Mac OS 10.6

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• AS3: Adding get/set methods to a class via prototype

  - by LiraNuna

  I'm looking for a way to extend a class via prototype by adding a get and set functions. The following code will add a function to the class' prototype: MyClass.prototype.newMethod = function(... args) { }; However I want to add both a get and set functions. I tried: MyClass.prototype.fakeProperty = get function(... args) { }; MyClass.prototype.fakeProperty = set function(... args) { }; But that seem to throw compile errors. Is this even possible? Is there some 'internal' naming convention for get/set functions? I am not looking for answers such as 'create a new class and new get/set functions there'.

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• Static struct in C++

  - by pingvinus

  Hi, I want to define an structure, where some math constants would be stored. Here what I've got now: struct consts { //salt density kg/m3 static const double gamma; }; const double consts::gamma = 2350; It works fine, but there would be more than 10 floating point constants, so I doesn't want to wrote 'static const' before each of them. And define something like that: static const struct consts { //salt density kg/m3 double gamma; }; const double consts::gamma = 2350; It look fine, but I got these errors: 1. member function redeclaration not allowed 2. a nonstatic data member may not be defined outside its class I wondering if there any C++ way to do it?

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• Why does the VBA Editor open on its own sometimes?

  - by Kevin Finn

  I've created a small script in Outlook 2003 VBA that watches for new appointments, and sets them to tentative and no reminder as I create them. However, I now find that seemingly at random, the VBA editor will open itself. It doesn't happen when I actually use the new script, but it did happen this morning when I un-hibernated my laptop, for example. The editor doesn't pop up any runtime errors or highlight any lines in the script, it's just there as if I had pressed Alt-F11 to launch it. Sometimes I close other apps and see that it's been sitting back there for a while. This behavior has only been occurring since I created this new script. Any ideas why this would occur? Thanks!

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• aspnet_regsql not working at all

  - by user252160

  I would like to create the ASP.NET User database template on a database of my own, because I'd like to fully untegrate the user system with the rest of my DB. As I've read, i needed to use the aspnet_regsql tool. I put all the options (because my database is running on SQLEXPRESS and is in an mdf file in my project's folder). the program starts and seemingly runs without any errors, however, when I open the database after that, not tables or stored procedures have been added. One more thing: I did one more test. I intentionally gave the -d option a wrong mdf file address, and surprisingly, the program "finished" correctly, yet no file was crated or modified whatsoever.

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• WPF DataGrid row validation error count

  - by SuperFloh1234

  Hi! I'm currently facing the problem, that I import an Excel file to a DataGrid. This works pretty fine, but after importing the table, I need to know how many rows are invalid. I have applied several validation rules for the different datatypes, and I have an icon in the row header, that shows up if the row is invalid. But since I have more that 10.000 rows in the grid, I don't want scroll all the way through it to find the errors. Any ideas, how to determine the count of invalid rows (and then maybe bind that to a textbox)? Thx

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• NSOpenGLView in NSSplitView

  - by Remizorrr

  When i put an NSOpenglView in NSSplitView, a problem occurs while dragging splitter. The openGLView and SplitView are resizing asynchronously. i found a solution in apple mail list thread http://developer.apple.com/mac/library/samplecode/GLChildWindowDemo/Introduction/Intro.html and i found a solution with some carbon calls. but now i get link error (only in release mode). so i'v got two questions - is there any cocoa way to fix the splitter - gl problem? if no - how can i fix carbon linker errors in release mode?

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• Running Send_SMS method from BroadcastReceiver

  - by burmat

  My application is an auto-reply application for text messages. I have a BroadcastReceiver for when a message arrives, and I need it to run a public method (Send_SMS). SMS_Sender.sendSMS(phoneNumber, messageText); does not work however, and eclipse wants to change my method to static. This would not be an issue if I did not have more receivers that catch when the message is sent/delivered/etc in this class. These receivers are then errors for being contained in a static method. So my question is, how do I run this method from a broadcast receiver so I can send the auto reply whenever it is triggered with a received message? -Thank you in advance, Nate

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