I have an indy IDHTTP component which is called repeatedly using a timer (4-5 times a second)
I have a poor internet connection so occasionally there are timeout problems or garbage responses that cause an error with the idHTTP component.
I have a try except finally clause around the component but when an error occurs the code shows an error and execution stops.
I know what causes the errors, its my poor internet connection, but what i want to do is just ignore the invalid response or error and just continue so that my program doesn't break.
I'm getting these errors because of a poor internet connection, I can't fix that. The code is used to access the Betfair API so advising Betfair won't help.
I try to debug the Protractor tests that contains many browser.wait statements.
I receive following error message:
Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.configuration-parser.js:50 at ontimeout (timers.js:475:11) configuration-parser.js:50 at tryOnTimeout (timers.js:310:5) configuration-parser.js:50
(repeated few times)
that doesn't help me at all.
Is it possible to force Protractor / Jasmine to provide information on which. particular condition it waits during debugging of an application? Or at least when it crashes, provide information for which condition it waited before timeout exception was raised.
This could help me to understand what is going on, in which step my tests really crashes. I've tried to debug tests step by step, but it also doesn't help, since it seems that code is not really executed when Visual Studio code stops in particular line, but after going through expect statement.
I'm not sure that is possible to know on which script it occurs.
I had the same problem and putting bigger jasmine timeout in conf.js file resolved the issue:
defaultTimeoutInterval: 2000000,
I've been using HP UFT for a couple of years now and I needed to start scheduling my tests to run during the night which I've sort of managed but I'm getting a few errors when the tests run, usually a 'Retry' will continue the test, it may be that the web site is not rendering quick enough for the next line of code. Sometimes it will fail randomly, again a retry will work (where I haven't already added a sync point)
So I could do with an 'on error retry', does such a thing exist? or could someone advise if there is a way around this please? perhaps a screenshot of the error would also be helpful so I know where my test is falling over and I can add a sync point or a wait.
Edit: Apologies for not giving enough info..
The error is an application error, and a pretty generic one where UFT cannot find the object to click on e.g.
"Cannot find the 'xxx' objects parent class frame, verify the parent properties match an object currently displayed in your application."
when this error appears I get options to 'Stop', 'RETRY', 'Skip' or 'Debug'
Given that you've (Pranav - Thanks) said 'on error retry' doesn't exist then you've pretty much answered my question, the only other way I can think to get around this is to keep running the tests and add sync points each time I get a problem and hopefully it will bottom out and ease off.
I will also look at recovery scenarios thanks Dave.
Create a Scenario Recovery for the test
Resources > Scenario Recovery
Create a scenario for Test run Error, this report the test as failed and include the error message in the run report. Allowing your other tests to keep going.
It also has Post-recovery options that "retry the current step and continue".
Tuorialspoint.com have a helpful reference
Recovery scenario reduces the need to add a check point after most lines of code :) thanks UFT.
In Visual Studio 2010, I have a number of unit tests. When I run multiple tests at one time using test lists, I sometimes reveive the following error for one or more of the tests:
The agent process was stopped while
the test was running.
It is never the same test failing, and if I try to run the test again, it succeeds.
I found this bug report on Connect, which seems to be the same problem, but it does not offer a solution.
Has anyone else seen this behaviour ? How I can avoid it ?
Edit
I am still experiencing this bug, and so is many of my colleagues on the same software/hardware setup. I have evaluated the answers so far, but they don't resolve the problem. I am starting a bounty for a solution to this problem.
This message is caused by an exception on a thread different from the executing test thread. All answers so far boil down to this simple explanation. It is a known bug in Visual Studio not to display any sensible information in that case.
Visual Studio’s test runner totally chokes if a thread other than the executing test thread throws an exception: It gets swallowed and there’s no output, no chance to intercept and debug and no nothing except a burned-down smoldering mess that was supposed to be your unit test.
I've just experienced the similar problem: some tests fail and they are different in different test runs. I don't know exactly the reason why it happens, but it began to occur when I added a finalizer to one of my classes. When I disable the finalizer - the problem disappears. When I turn the finalizer on - the problem comes back.
Right now I don't know how to overcome this.
I was having this problem, and it turned out to be a problem in my code which the Test Framework wasn't catching properly. A little accidental refactoring had left me with this code:
public void GetThingy()
{
this.GetThingy();
}
This is of course an infinite recursion, and caused a StackOverflowException (I guess). What this caused was the dreaded: "The agent process was stopped while the test was running."
A quick code inspection showed me the problem, and my tests are now running fine. Hope this helps - might be worth inspecting the code looking for issues, or maybe extracting a bit into a console app and checking it works properly there.
I was able to find the source of my problem by looking in the test result file (/TestResults/*.trx) It provided the full details of the exception that occurred in the background thread, and once I resolved that exception the "agent processed stopped..." error went away.
In my case I was unintentionally launching the GUI in my unit test, which eventually caused a System.ComponentModel.InvalidAsynchronousStateException to be thrown.
So my .trx file contained:
<RunInfo computerName="DT-1202" outcome="Error" timestamp="2013-07-29T13:52:11.2647907-04:00">
<Text>One of the background threads threw exception:
System.ComponentModel.InvalidAsynchronousStateException: An error occurred invoking the method. The destination thread no longer exists.
at System.Windows.Forms.Control.WaitForWaitHandle(WaitHandle waitHandle)
at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous)
at System.Windows.Forms.Control.Invoke(Delegate method, Object[] args)
at System.Windows.Forms.Control.Invoke(Delegate method)
...
</Text>
</RunInfo>
This didn't provide any information on what test caused the error, but it did show me where the exception was, which was very useful.
This message is typically generated when the test process crashes and can happen when there is an unhandled exception on a background thread, a stack overflow occurs, or an explicit call to Process.GetCurrentProcess().Kill() or Environment.Exit. Another possible cause is an access violation in unmanaged code.
Something no one has mentioned is that there may be additional information in the event log. Usually you will not get much information on why the test crashed in the results, however in the event of an unhandled exception on a background thread, then the test framework writes details to the Application event log with source VSTTExecution. If there is no information written to the event log then it is likely one of the other causes listed above.
I encountered the same Problem and solved it while Removing
Environment.Exit(0);
So i am pretty sure, that this error occurs while your test or method under test, is causing the executing process to terminate.
In my case the solution was resolved by checking the Output Window.
'QTAgent32.exe' (Managed
(v4.0.30319)): Loaded
'C:\TestResults\bdewey_XXXXXX072
2011-01-11
17_00_40\Out\MyCode.dll',
Symbols loaded. E, 9024, 9,
2011/01/11, 17:00:46.827,
XXXXX072\QTAgent32.exe, Unhandled
Exception Caught, reporting through
Watson: [Exception message]
In my case I had a FileSystemWatcher that was throwing an error on a seperate thread.
Thanks for posting the question. I just ran into this problem and figured out a cause that you may be running into.
An asynchronous exception may have
occurred
During my test setup, I create an object that queues a worker thread in the thread pool. If I run through debugging fast enough my code passes.
If the worker thread kicks off and has an error BEFORE the test setup completes, then I get a result of Aborted with no reasoning.
If the worker thread kicks off and has an error AFTER the test has begun, then I get a result of : Error - The agent process was stopped while the test was running.
Important to note: this is a component that I use throughout several of my tests. If the test framework encounters too many of these errors it aborts the rest of the tests.
Hope this helps
I added try/catch blocks to the descructor ~ClassName(){} that were defined in any class involved in my tests. This fixed the problem for me.
~MyClass()
{
try
{
// Some Code
}
catch (Exception e)
{
// Log the exception so it's not totally hidden
// Console.WriteLine(e.ToString());
}
}
For finding out where the exception was thrown click on the hyperlink "Test Run Error" next to the exclamation icon in the Test Results window. A window with the stack trace is opened.
This helps a lot to track down the error!
I had the same problem and it was caused by a finalizer for an unmanaged resource (a file writer that was not getting disposed properly for some reason).
After wrapping the finalizer code in a try-catch that swallows the exception, the problem disappeared. I don't recommend swallowing exceptions like that, so it would obviously be wise to find out why the exception is occurring in the first place.
I have had this happening on the odd occasion, and the culprit almost always turns out to be threading.
Strangely enough all the tests would work fine on the development machines, then randomly fail on the build servers.
On closer inspection it turned out that although the tests were being listed as passed on the dev boxes, there were exceptions being thrown. The exceptions were being thrown on a seperate thread which didn't get picked up as an error.
The exception details were being logged against the test trace, so we were able to identify which code/tests needed to be modified.
Hope this helps someone.
In my case I had some unit-tests for a WCF-service. This WCF service was starting up 2 timers.
Those timers caused side effects.
--> I disable these timers by default and everything is fine!
BTW: I use WCFMock to fake the WCF service, so I have "real" unit tests around my WCF service
This error was caused by a Finalizer for me as well.
The Finalizer was actaully calling some DB code which wasn't mocked out. Took me a while to find it as it wasn't a class I wrote and the reference to it was burred quite a few classes deep.
I have run into a similar problem where a test is failing in TestInitialize and is also running code from a ddl from another of my projects. I get the error message as described above and if I try to debug the test, the test is just aborted without any exception details.
I suspect that the problem may be that the dlls from my other project are from a Visual Studio 2012 project and I am running my tests in a VS2010 project, and/or possibly that the UnitTestFramwork dll versions from the 2 projects are mismatched.
The problem can also be triggered by an Exception or Stackoverflow in Constructor of a TestClass.
As this error can have many different causes, I'd like to add another one for completeness of this thread.
If all your tests are aborting as described by the OP, the cause might be a wrong project configuration. In my case the target framework was set to .NET Framework 3.5. Setting it to a higher version through the project properties page (tab Application) resolved the issue.
I was able to determine what was causing my issue by looking in the Windows Logs > Application log entries within the Windows Event Viewer. Look for entries at the time the test bombed-out. I had an Error entry similar to below:
QTAgent32_40.exe, PID 10432, Thread 2) AgentProcess:CurrentDomain_UnhandledException: IsTerminating : System.NullReferenceException: Object reference not set to an instance of an object.
at XXX.YYY.ZZZ.cs:line 660
at XXX.YYY.AAA.Finalize() in C:\JenkinsSlave\workspace\XXX.YYY.AAA.cs:line 180
It was indeed a null reference exception within a method called from a class finalizer.
For anyone happening upon this old question and wondering what's being thrown from their thread(s), here's a tip. Using Task.Run (as opposed to, say, Thread.Start) will report child thread exceptions much more reliably. In short, instead of this:
Thread t = new Thread(FunctionThatThrows);
t.Start();
t.Join();
Do this:
Task t = Task.Run(() => FunctionThatThrows());
t.Wait();
And your error logs should be much more useful.