当频繁出现连接和读取异常时，socket句柄无法正常释放

[LiXianYua]

Package

dio

Version

5.2.0+1

Operating-System

Android

Output of flutter doctor -v

[✓] Flutter (Channel stable, 3.10.6, on macOS 14.1.1 23B81 darwin-arm64, locale zh-Hans-CN)
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    • Engine revision cdbeda788a
    • Dart version 3.0.6
    • DevTools version 2.23.1
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/xx/Dev/Sdk/Android
    • Platform android-34, build-tools 34.0.0
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    • Java version Java(TM) SE Runtime Environment (build 17.0.6+9-LTS-190)
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[!] Android Studio
    • Android Studio at /Users/xxx/Applications/Android Studio.app/Contents
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      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
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    ✗ Unable to find bundled Java version.
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[✓] IntelliJ IDEA Ultimate Edition (version 2023.3.3)
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[✓] Connected device (3 available)
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    • Chrome (web)     • chrome           • web-javascript • Google Chrome 121.0.6167.139

[✓] Network resources
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! Doctor found issues in 2 categories.

Dart Version

3.0.6

Steps to Reproduce

弱网环境下，两个Dio实例，频繁请求（重试），从二月一日到二月三日，共请求6297次，前6296次都是连接超时和读取超时，第6297次出现 OS Error: Too many open files, errno = 24 ，查看/proc/$(pid)/fd/发现进程下有一百多个socket句柄持续存在无法释放，后续出现App卡死，无法操作
dio实例创建如下
`class WeatherRepository {
factory WeatherRepository() => _instance ??= WeatherRepository.initData();

WeatherRepository.initData() {
_dio.interceptors.add(dio.LogInterceptor(requestBody: true, responseBody: true, logPrint: Logger.i));
_dio.options.baseUrl = 'https://$_domain';
}

static WeatherRepository? _instance;

final dio.Dio _dio = dio.Dio(BaseOptions(
connectTimeout: const Duration(seconds: 10),
receiveTimeout: const Duration(seconds: 10),
sendTimeout: const Duration(seconds: 10),
));

String get _domain => SystemController.to.commonDomain;

/// 。。。。。。 ////

}`

连接超时异常：
DioException [connection timeout]: The request connection took longer than 0:00:10.000000. It was aborted. DioMixin.fetch.<anonymous closure> (package:dio/src/dio_mixin.dart:533) _rootRunUnary (dart:async/zone.dart:1407) _CustomZone.runUnary (dart:async/zone.dart:1308) _FutureListener.handleError (dart:async/future_impl.dart:165) Future._propagateToListeners.handleError (dart:async/future_impl.dart:796) Future._propagateToListeners (dart:async/future_impl.dart:817) Future._completeError (dart:async/future_impl.dart:592) _SyncCompleter._completeError (dart:async/future_impl.dart:51) _Completer.completeError (dart:async/future_impl.dart:23) Future.any.onError (dart:async/future.dart:620) _rootRunBinary (dart:async/zone.dart:1423) _CustomZone.runBinary (dart:async/zone.dart:1315) _FutureListener.handleError (dart:async/future_impl.dart:162) Future._propagateToListeners.handleError (dart:async/future_impl.dart:796) Future._propagateToListeners (dart:async/future_impl.dart:817) Future._completeError (dart:async/future_impl.dart:592) Future._chainForeignFuture.<anonymous closure> (dart:async/future_impl.dart:537) _rootRun (dart:async/zone.dart:1399) _CustomZone.run (dart:async/zone.dart:1301) _CustomZone.runGuarded (dart:async/zone.dart:1209) _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1249) _microtaskLoop (dart:async/schedule_microtask.dart:40) _startMicrotaskLoop (dart:async/schedule_microtask.dart:49)

Too many open files异常：
Error: SocketException: Connection failed (OS Error: Too many open files, errno = 24), address = xxxxxxxxx, port = 443, DioMixin.fetch.<anonymous closure> (package:dio/src/dio_mixin.dart:533) _rootRunUnary (dart:async/zone.dart:1407) _CustomZone.runUnary (dart:async/zone.dart:1308) _FutureListener.handleError (dart:async/future_impl.dart:165) Future._propagateToListeners.handleError (dart:async/future_impl.dart:796) Future._propagateToListeners (dart:async/future_impl.dart:817) Future._completeError (dart:async/future_impl.dart:592) _SyncCompleter._completeError (dart:async/future_impl.dart:51) _Completer.completeError (dart:async/future_impl.dart:23) Future.any.onError (dart:async/future.dart:620) _rootRunBinary (dart:async/zone.dart:1423) _CustomZone.runBinary (dart:async/zone.dart:1315) _FutureListener.handleError (dart:async/future_impl.dart:162) Future._propagateToListeners.handleError (dart:async/future_impl.dart:796) Future._propagateToListeners (dart:async/future_impl.dart:817) Future._completeError (dart:async/future_impl.dart:592) Future._chainForeignFuture.<anonymous closure> (dart:async/future_impl.dart:537) _rootRun (dart:async/zone.dart:1399) _CustomZone.run (dart:async/zone.dart:1301) _CustomZone.runGuarded (dart:async/zone.dart:1209) _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1249) _microtaskLoop (dart:async/schedule_microtask.dart:40) _startMicrotaskLoop (dart:async/schedule_microtask.dart:49)

Expected Result

句柄正常释放

Actual Result

句柄无法释放

[AlexV525]

请尝试 HttpClient 是否能复现相关情况。

[LiXianYua]

使用http包依旧会出现此问题，和dio无关