Bug 7236 - LongRunning tasks should be background threads
Summary: LongRunning tasks should be background threads
Status: RESOLVED FIXED
Alias: None
Product: Class Libraries
Classification: Mono
Component: mscorlib ()
Version: 2.10.x
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Jérémie Laval
URL:
Depends on:
Blocks:
 
Reported: 2012-09-17 15:26 UTC by Mikayla Hutchinson [MSFT]
Modified: 2012-11-15 10:41 UTC (History)
1 user (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description Mikayla Hutchinson [MSFT] 2012-09-17 15:26:24 UTC
Tasks created with TaskCreationOptions.LongRunning or TaskContinuationOptions.LongRunning should use background threads.
Comment 2 Mikayla Hutchinson [MSFT] 2012-09-17 15:34:22 UTC
It's not invalid, it affects Mono 2.10.10 and can cause apps to hang on quit.
Comment 3 Jérémie Laval 2012-09-21 09:06:54 UTC
Provide a test case, the following snippet is working:

using System;
using System.Threading;
using System.Threading.Tasks;

class T
{
	public static void Main ()
	{
		var task = new Task (() => {});
		task.ContinueWith (t => Console.WriteLine (Thread.CurrentThread.IsBackground), TaskContinuationOptions.LongRunning);
		task.Start ();
		Thread.Sleep (500);
	}
}
Comment 4 Mikayla Hutchinson [MSFT] 2012-09-21 16:27:53 UTC
csharp> using System.Threading.Tasks;
csharp> using System.Threading;
csharp> Task.Factory.StartNew (() => {}).ContinueWith (t => Console.WriteLine (Thread.CurrentThread.IsBackground), TaskContinuationOptions.LongRunning).Wait ();  
False
Comment 5 Mikayla Hutchinson [MSFT] 2012-09-21 16:32:59 UTC
The same returns true on .NET.
Comment 6 Jérémie Laval 2012-09-21 17:23:38 UTC
csharp> using System.Threading.Tasks;
csharp> using System.Threading;
csharp> Task.Factory.StartNew (() => {}).ContinueWith (t => Console.WriteLine(Thread.CurrentThread.IsBackground), TaskContinuationOptions.LongRunning).Wait();
True
csharp> 

Upgrade your Mono
Comment 7 Mikayla Hutchinson [MSFT] 2012-09-21 19:45:57 UTC
This isn't a question of "my Mono", it's a question of making MonoDevelop work correctly for all our users.

To what version of Mono do we need to upgrade MonoDevelop's dependency?
Comment 8 Jérémie Laval 2012-11-15 10:41:10 UTC
IIRC, that was sorted out.