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MrCC
c# .net exception-handling task-parallel-library task
Given the following simplified code/// <summary>/// Within the VS2010 debugger, the following test will cease with an /// “Exception was unhandled by user code”. /// (Debug window reports a “A first chance exception of type /// ‘System.Exception’ …” BEFORE the exception is caught /// further down in the execution path.)/// OUTSIDE the VS2010 debugger, the exception is caught by the tComplete /// task that follows the tOpen task, just as expected./// </summary>public void StartToOpe
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Gennady Vanin Novosibirsk
c# .net task-parallel-library task
Consider the following code which uses basic Task library functionality with a CancellationTokenSource. It starts up a thread which fills a Dictionary with prices and reads the data from an SQL server db. The thread ends after about 10 minutes and every 2 hours it is fired up again, calling Cancel first in case the thread was still running.private CancellationTokenSource mTokenSource = new CancellationTokenSource();internal Prices(Dictionary<string, Dealer> dealers) {mDealers = dealers;mTa
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Ralph Willgoss
c# multithreading .net-4.0 task
I updated my code to use Tasks instead of threads….Looking at memory usage and CPU I do not notices any improvements on the multi-core PC, Is this expected?My application essentially starts up threads/tasks in different objects when it runs…All I’m doing is a simple Task a = new Task(…) a.Start();
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BjarkeCK
c# asp.net-mvc asp.net-mvc-4 backgroundworker task
I need a operations wich needs to run every x secconds forever, and to achive this i did:protected void Application_Start() {InitialieOnce.Initialize(); }public static class InitialieOnce {private static bool initialized = false;public static void Initialize(){if (initialized == false){initialized = true;Thread t = new Thread(x => CheckStatus());t.IsBackground = true;t.Start();}}private static void CheckStatus(){//My script goes here.Thread.Sleep(8000);CheckStatus();} }After some time (about
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Rivka
exception httpclient task asp.net-web-api
I have the following task in my ASP.NET Web API that saves the incoming request as a file. It seems to work fine on my local, but on the hosting server, the file is not saved, and my logs indicate the status is Faulted. As I understand, this has to do with unhandled exceptions. How can I find out what these exceptions are so I can resolve them?// Save fileMultipartFormDataStreamProvider provider = new MultipartFormDataStreamProvider(HttpContext.Current.Server.MapPath(“~/Files”));Task<IEnumera
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Bat_Programmer
windows task scheduled-tasks
In my windows task scheduler, I have scheduled a task to run a c# console application executable on a daily basis. This application sends some data to the database and then sends an email.When I run it normally it works but however when it is run through task scheduler, it sends data to the database but is unable to send the email.Any ideas on how to fix this?EDIT: Yes I can send correctly through console application. It uses default network credentials..However when I look at the event logs I
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VMAtm
c# java android .net task
As you might know, Android’s SDK features a AsyncTask class which allows for code execution on a separate thread and result acquisition in the main (UI) thread. In short, something like this:class AsyncTask {void onPreExecute(…){//Executed on the main thread BEFORE the secondary thread gets to work on anything.}void execute(…){//This runs on the secondary thread.}void onPostExecute(…){//This runs on the main thread AFTER the secondary thread finishes work. You get the result here in the fo
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sleiman jneidi
c# multithreading exception-handling task
Why exceptions thrown within a task are silent exception and you never know if a certain exception has been throwntry {Task task = new Task(() => {throw null;});task.Start();}catch{Console.WriteLine(“Exception”);} the program run successfully in a complete silence! where the behavior of threads is different try {Thread thread = new Thread(() => {throw null;});thread .Start();}catch{Console.WriteLine(“Exception”);}a null pointer exception will be thrown in this case. What is the differenc
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svick
c# wpf exception error-handling task
These are my tasks. How should i modify them to prevent this error. I checked the other similar threads but i am using wait and continue with. So how come this error happening?A Task’s exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.var CrawlPage = Task.Factory.StartNew(() => {return crawlPage(srNewCrawledUrl, srNewCrawledPageId, srMainSiteId); });var GetLinks = CrawlPa
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Royi Namir
c# .net-4.0 task-parallel-library task
If I have a task which throws an exception , I can check in the continuation if there was an exception:Task task1 = Task.Factory.StartNew (() => { throw null; }); Task task2 = task1.ContinueWith (ant => Console.Write (ant.Exception));But I also know that : If an antecedent throws and the continuation fails to query theantecedent’s Exception property (and the antecedent isn’t otherwisewaited upon), the exception is considered unhandled and theapplication dies .So I tried : Task task1 = Tas
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FSX
c# c#-4.0 task
My understanding is that when a Task throws an exception, it’s get stored and re-thrown when either one of (Result, WaitAll) property of Tasks is observed or when GC happened. Given that, I run following code.Task t = Task.Factory.StartNew(() => { throw new Exception(“Hello World”); });for (int i = 0; i < 10000; i++) {Console.WriteLine(i); } GC.Collect();for (int a = 20; a < 30; a++){Console.WriteLine(a);}But when I run the code above, I except an exception to be t
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Imri
c# multithreading task-parallel-library task
I’m trying to abort a task which internally creates a thread. The problem is that the inner thread is trying to access a resource which is already disposed (since the parent task is already cancelled), and that causes an unhandled exception.The code which creates the thread is a ‘black box’, an external DLL, so I cannot pass it a CancellationToken or so.What can I do to make the task abort its inner threads? Or what is the solution for this situation?Thanks
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jbe
c# visual-studio unit-testing exception task
How can I activate the runtime settings ThrowUnobservedTaskExceptions in unit tests (Visual Studio 2012 unit test environment)?I have tried to add an App.config file in the unit test project with:<?xml version=”1.0″ encoding=”utf-8″ ?> <configuration><runtime><ThrowUnobservedTaskExceptions enabled=”true”/></runtime> </configuration>Unfortunately, this does not work. The following unit test should fail because a task throws an unhandled exception. How can I ach
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svick
c# exception-handling task lambda-functions c#-5.0
I am trying to convert an application to use Tasks instead of Microsoft’s multithreaded framework, but I’m having trouble with the error handling. From Microsoft’s documentation ( http://msdn.microsoft.com/en-us/library/vstudio/0yd65esw.aspx ), I would expect the try-catch below to catch the exception:private async void Button1_Click() {try{object obj = await TaskFunctionAsync()}catch(Exception ex){} }public Task<object> TaskFunctionAsync() {return Task.Run<object>(() =>{throw new
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user2161499
android json asynchronous activity task
I’d like to know how to add an AsyncTask (successfully) to the following code. I’ve already implemented the AsyncTask (to the best of my knowledge – using info I’ve found on the net) however it keeps crashing and I’m not sure exactly why… any help is greatly appreciated!JAVA:import org.json.JSONException; import org.json.JSONObject;import com.nfc.linked.DatabaseHandler; import com.nfc.linked.UserFunctions;import android.app.Activity; import android.content.Intent; import android.os.Bundle; imp
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PeeHaa
exception task
I have a Fatal Exception: AsyncTask #1 in the following part, but dont know why. /*** getting Charts from URL* */protected String doInBackground(String… args) {// Building ParametersArrayList<NameValuePair> params = new ArrayList<NameValuePair>();// getting JSON string from URLJSONObject json = jParser.makeHttpRequest(url_read, “POST”, params);// Check your log cat for JSON responseLog.d(“Charts: “, json.toString());try {// Checking for SUCCESS TAGint success = json.getInt(TAG_SUCC
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Peter Hosey
cocoa shell task ping nstask
I tried this codeNSTask *task; task = [[NSTask alloc] init]; [task setLaunchPath: @”/usr/bin/ping”];NSArray *arguments; arguments = [NSArray arrayWithObjects: @”-c”, @”3″,@”stackoverfow.com”, nil]; [task setArguments: arguments];NSPipe *pipe; pipe = [NSPipe pipe]; [task setStandardOutput: pipe];NSFileHandle *file; file = [pipe fileHandleForReading];[task launch];NSData *data; data = [file readDataToEndOfFile];NSString *string; string = [[NSString alloc] initWithData: data encoding: NSUTF8StringE
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CLod
ruby-on-rails rake task
Releated to this: Rake on Rails 3 problemI’m trying to copy a rake task working under rails 2, into a rails 3 app.The rake task is the following:namespace :cached_assets dodesc “Regenerate aggregate/cached files”task :regenerate => :environment doinclude ActionView::Helpers::TagHelperinclude ActionView::Helpers::UrlHelperinclude ActionView::Helpers::AssetTagHelperstylesheet_link_tag :all, :cache => CACHE_CSS_JSjavascript_include_tag “a.js”, “b.js”, “c.js”, :defaults, :cache => CACHE_CS
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mconner
dependencies task sbt
I am trying to define a dependency between a custom task and an existing task (in this case compile in Compile), following: Task Dependencies in sbt documentation. However, closest I could get is this:object ApplicationBuild extends Build {val hello = TaskKey[Unit](“hello”, “Prints ‘Hello World'”)val helloTaskA = hello := {println(“Hello World”) }val helloTaskB = hello <<= hello.dependsOn(compile in Compile)val main = play.Project(appName, appVersion, appDependencies).settings(helloTaskA,
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benygel
java ant classpath task
I’ve an error when I execute this in my ant and I don’t understand why ant can’t recognize the task classpath :<?xml version=”1.0″?><project default=”task”><target name=”task”><classpath><pathelement path=”.” /></classpath> </target></project>I have the error message :task:BUILD FAILED C:\way\build.xml:6: Problem: failed to create task or type classpath Cause: The name is undefined. Action: Check the spelling. Action: Check that any custom tasks/ty
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krock
java api google-app-engine queue task
Hi i’m new to Task queue concepts when i referred the guide I got struck on this linequeue.add(DatastoreServiceFactory.getDatastoreService().getCurrentTransaction(),TaskOptions().url(“/path/to/my/worker”)); what is TaskOptions() method. Is it default method are method created manually what will TaskOptions() method will return.I created a method called TaskOption() when i to return a string value its saying error as “The method url(String) is undefined for the type String”In url what i want to s
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AlanGame
ios multithreading osx task
In kern/task.h, i found the declare:__BEGIN_DECLS extern task_t current_task(void); extern void task_reference(task_t task); __END_DECLSBut when i call the function current_task() in an iOS application. I got the linker error like:Undefined symbols for architecture i386 from: “_current_task”, referenced from:…. in xxx.o ld: symbol(s) not found for architecture i386 collect2: ld returned 1 exit status How to fix this problem?
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Jeff
google-app-engine task
I am at my wits end here. I hava a task, nested in a transaction. The task sends a clone of the incoming data to another service . But when the task completes, for some unknown reason, the origional handler which set off the task is called again, which in turn sets off the task etc… Eventualy the main handler gets too much contention in the datastore and returns a 500 (i think, its difficult to sift through the pages of logs generated). I am worried as the other service runs on Azure and is pr
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user1633962
google-app-engine queue task pull task-queue
I’m getting this error below trying to access a pull task queue. Until the last friday (Oct, 5) it was working perfectly. Today (Oct, 8) it wasn’t working. I run it from a Websphere Application Server v7 with the 2 imported certificates below: accounts.googleapis.com:443 and www.googleapis.com:443.I’m using this version below of the Task Queue API:<dependency><groupId>com.google.apis</groupId><artifactId>google-api-services-taskqueue</artifactId><version>**v1b