8000 Dio().fetch() hangs in isolate · Issue #2399 · cfug/dio · GitHub
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mikes222 opened this issue May 5, 2025 · 0 comments
Open

Dio().fetch() hangs in isolate #2399

mikes222 opened this issue May 5, 2025 · 0 comments
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h: need triage This issue needs to be categorized s: bug Something isn't working

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@mikes222
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mikes222 commented May 5, 2025

Package

dio

Version

5.8.0+1

Operating-System

Windows

Adapter

Default Dio

Output of flutter doctor -v

[√] Flutter (Channel stable, 3.29.3, on Microsoft Windows [Version 10.0.22631.5189], locale de-AT) [361ms]
    • Flutter version 3.29.3 on channel stable at C:\develop\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ea121f8859 (3 weeks ago), 2025-04-11 19:10:07 +0000
    • Engine revision cf56914b32
    • Dart version 3.7.2
    • DevTools version 2.42.3

[√] Windows Version (11 Pro 64-bit, 23H2, 2009) [2,7s]

[!] Android toolchain - develop for Android devices (Android SDK version 35.0.0) [283ms]
    • Android SDK at C:\Users\micro\AppData\Local\Android\sdk
    X cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    X Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/to/windows-android-setup for more details.

[√] Chrome - develop for the web [143ms]
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.8.2) [142ms]
    • Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
    • Visual Studio Community 2022 version 17.8.34322.80
    • Windows 10 SDK version 10.0.22621.0

[√] Android Studio (version 2024.3) [13ms]
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
       https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 21.0.6+-13355223-b631.42)

[√] Connected device (4 available) [214ms]
    • sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64    • Android 15 (API 35) (emulator)
    • Windows (desktop)            • windows       • windows-x64    • Microsoft Windows [Version 10.0.22631.5189]
    • Chrome (web)                 • chrome        • web-javascript • Google Chrome 135.0.7049.115
    • Edge (web)                   • edge          • web-javascript • Microsoft Edge 136.0.3240.50

[√] Network resources [656ms]
    • All expected network resources are available.

! Doctor found issues in 1 category.
P

Dart Version

Dart SDK version: 3.7.2 (stable) (Tue Mar 11 04:27:50 2025 -0700) on "windows_x64"

Steps to Reproduce

I have created a method to fetch data from http(s) server. When calling this method in the main thread everything works. Unfortunately if I call the very same method in an isolate the last line in the following code snippet Response response = await responseFuture; hangs indefinitely. I am unable to debug what exactly causes this problem and therefore would like to get some hints how to find the root cause.

RequestOptions requestOptions = RequestOptions(
  path: source,
  method: "GET",
  connectTimeout: const Duration(seconds: 35),
  receiveTimeout: const Duration(seconds: 40),
  sendTimeout: const Duration(seconds: 62),
  //receiveDataWhenStatusError: true,
  followRedirects: true,
  responseType: ResponseType.stream,
);

final Dio _httpClient = Dio();

print("vor response");
Future<Response> responseFuture = _httpClient.fetch(requestOptions);
Response response = await responseFuture;

Expected Result

Not hanging in an isolate created with Isolate.spawn

Actual Result

hanging when awaiting the result in the isolate
@mikes222 mikes222 added h: need triage This issue needs to be categorized s: bug Something isn't working labels May 5, 2025
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