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[Foundation] As a default, do not use the workaround in NSUrlSessionHandler for the threadpool. - #8296

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Apr 6, 2020
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[Foundation] As a default, do not use the workaround in NSUrlSessionHandler for the threadpool.#8296
mandel-macaque merged 1 commit into
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When an application was moved the the background, the thread pool from
mono would be left in an unknonw state, making applications to stale
(https://xamarin.github.io/bugzilla-archives/58/58633/bug.html#c7).

This work was added in #5463

We now set the default behaviour to skip the workaround to see if the
new provided mono works as expected. We do not fully remove the
workaround because we need some real world testing.

If the new ThreadPool from mono does not work as expected we do provide
a property to re-add the workaround. The BypassBackgroundSessionCheck
can be set to false to allow users get it back.

The following is an example usage of the API:

// create your own handler instance rather than using the one provided by default.
var handler = new NSUrlSessionHandler() {
  BypassBackgroundSessionCheck = false, // readd the hack
};
var httpClient = new HttpClient (handler); // use the handler with the hack

This is a partial fix for #7080

…andler for thethreadpool.

When an application was moved the the background, the thread pool from
mono would be left in an unknonw state, making applications to stale
(https://xamarin.github.io/bugzilla-archives/58/58633/bug.html#c7).

This work was added in dotnet#5463

We now set the default behaviour to skip the workaround to see if the
new provided mono works as expected. We do not fully remove the
workaround because we need some real world testing.

If the new ThreadPool from mono does not work as expected we do provide
a property to re-add the workaround. The BypassBackgroundSessionCheck
can be set to false to allow users get it back.

The following is an example usage of the API:

```csharp
// create your own handler instance rather than using the one provided
by default.
var handler = new NSUrlSessionHandler() {
  BypassBackgroundSessionCheck = false, // readd the hack
};
var httpClient = new HttpClient (handler); // use the handler with the hack
```

This is a partial fix for dotnet#7080
@mandel-macaque mandel-macaque added the do-not-merge Do not merge this pull request label Apr 6, 2020
@mandel-macaque

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Adding do not merge, we have to wait for the d16-7 branch to be created.

@whitneyschmidt whitneyschmidt left a comment

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👍 thought - would it be useful to add an issue to track removing the hack code once it's verified that it's not needed anymore?

@mandel-macaque

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@whitneyschmidt yes, we have Remove workaround for ThreadPool not working #7080 for that, this PR is not closing it :)

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@mandel-macaque mandel-macaque changed the title [Foundation] As a default, do not use the workaround in NSUrlSessionHandler for thethreadpool. [Foundation] As a default, do not use the workaround in NSUrlSessionHandler for the threadpool. Apr 6, 2020
@mandel-macaque mandel-macaque removed the do-not-merge Do not merge this pull request label Apr 6, 2020
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d16-7 branched, landing.

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5 participants