ABP v7.1 Blazor应用SocketsHttpHandler已释放对象报错求助

在浏览器中打开ABP v7.1 Blazor应用并登录后，可正常使用几分钟，但之后总会抛出无法访问已释放对象的错误，目前只能通过重启IIS上的Blazor应用临时解决。错误日志如下：

Error: Volo.Abp.Http.Client.AbpRemoteCallException: An error occurred during the ABP remote HTTP request. (Cannot access a disposed object.

Object name: 'System.Net.Http.SocketsHttpHandler'.) See the inner exception for details.

 ---> System.ObjectDisposedException: Cannot access a disposed object.

Object name: 'System.Net.Http.SocketsHttpHandler'.

   at System.Net.Http.SocketsHttpHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

   at Microsoft.Extensions.Http.Logging.LoggingHttpMessageHandler.<SendAsync>g__Core|5_0(HttpRequestMessage request, CancellationToken cancellationToken)

   at Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler.<SendAsync>g__Core|5_0(HttpRequestMessage request, CancellationToken cancellationToken)

   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)

   at Volo.Abp.Http.Client.ClientProxying.ClientProxyBase`1.RequestAsync(ClientProxyRequestContext requestContext)

   --- End of inner exception stack trace ---

   at Volo.Abp.Http.Client.ClientProxying.ClientProxyBase`1.RequestAsync(ClientProxyRequestContext requestContext)

   at Volo.Abp.Http.Client.ClientProxying.ClientProxyBase`1.RequestAsync[T](ClientProxyRequestContext requestContext)

   at Volo.Abp.Http.Client.ClientProxying.ClientProxyBase`1.RequestAsync[T](String methodName, ClientProxyRequestTypeValue arguments)

   at Volo.Abp.AspNetCore.Mvc.ApplicationConfigurations.ClientProxies.AbpApplicationConfigurationClientProxy.GetAsync(ApplicationConfigurationRequestOptions options)

   at Volo.Abp.AspNetCore.Mvc.Client.MvcCachedApplicationConfigurationClient.GetRemoteConfigurationAsync()

   at Volo.Abp.AspNetCore.Mvc.Client.MvcCachedApplicationConfigurationClient.<GetAsync>b__19_0()

   at Volo.Abp.Caching.DistributedCache`2.GetOrAddAsync(TCacheKey key, Func`1 factory, Func`1 optionsFactory, Nullable`1 hideErrors, Boolean considerUow, CancellationToken token)

   at Volo.Abp.AspNetCore.Mvc.Client.MvcCachedApplicationConfigurationClient.GetAsync()

   at Volo.Abp.AspNetCore.Mvc.Client.RemotePermissionChecker.IsGrantedAsync(String name)

   at Volo.Abp.AspNetCore.Mvc.Client.RemotePermissionChecker.IsGrantedAsync(ClaimsPrincipal claimsPrincipal, String name)

   at Volo.Abp.Authorization.PermissionRequirementHandler.HandleRequirementAsync(AuthorizationHandlerContext context, PermissionRequirement requirement)

   at Microsoft.AspNetCore.Authorization.AuthorizationHandler`1.HandleAsync(AuthorizationHandlerContext context)

   at Microsoft.AspNetCore.Authorization.DefaultAuthorizationService.AuthorizeAsync(ClaimsPrincipal user, Object resource, IEnumerable`1 requirements)

   at Microsoft.AspNetCore.Components.Authorization.AuthorizeViewCore.IsAuthorizedAsync(ClaimsPrincipal user)

   at Microsoft.AspNetCore.Components.Authorization.AuthorizeViewCore.OnParametersSetAsync()

   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)

   at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync() Blazor.BasicTheme.Global.0FC7E56DDD5146F5685D7C13F585CBC7.js:1:119202
[2024-09-05T13:53:10.139Z] Error: Volo.Abp.Http.Client.AbpRemoteCallException: An error occurred during the ABP remote HTTP request. (Cannot access a disposed object.

Object name: 'System.Net.Http.SocketsHttpHandler'.) See the inner exception for details.

 ---> System.ObjectDisposedException: Cannot access a disposed object.

Object name: 'System.Net.Http.SocketsHttpHandler'.

   at System.Net.Http.SocketsHttpHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

   at Microsoft.Extensions.Http.Logging.LoggingHttpMessageHandler.<SendAsync>g__Core|5_0(HttpRequestMessage request, CancellationToken cancellationToken)

   at Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler.<SendAsync>g__Core|5_0(HttpRequestMessage request, CancellationToken cancellationToken)

   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)

   at Volo.Abp.Http.Client.ClientProxying.ClientProxyBase`1.RequestAsync(ClientProxyRequestContext requestContext)

   --- End of inner exception stack trace ---

   at Volo.Abp.Http.Client.ClientProxying.ClientProxyBase`1.RequestAsync(ClientProxyRequestContext requestContext)

   at Volo.Abp.Http.Client.ClientProxying.ClientProxyBase`1.RequestAsync[T](ClientProxyRequestContext requestContext)

   at Volo.Abp.Http.Client.ClientProxying.ClientProxyBase`1.RequestAsync[T](String methodName, ClientProxyRequestTypeValue arguments)

   at Volo.Abp.AspNetCore.Mvc.ApplicationConfigurations.ClientProxies.AbpApplicationConfigurationClientProxy.GetAsync(ApplicationConfigurationRequestOptions options)

   at Volo.Abp.AspNetCore.Mvc.Client.MvcCachedApplicationConfigurationClient.GetRemoteConfigurationAsync()

   at Volo.Abp.AspNetCore.Mvc.Client.MvcCachedApplicationConfigurationClient.<GetAsync>b__19_0()

   at Volo.Abp.Caching.DistributedCache`2.GetOrAddAsync(TCacheKey key, Func`1 factory, Func`1 optionsFactory, Nullable`1 hideErrors, Boolean considerUow, CancellationToken token)

   at Volo.Abp.AspNetCore.Mvc.Client.MvcCachedApplicationConfigurationClient.GetAsync()

   at Volo.Abp.AspNetCore.Mvc.Client.RemotePermissionChecker.IsGrantedAsync(String name)

   at Volo.Abp.AspNetCore.Mvc.Client.RemotePermissionChecker.IsGrantedAsync(ClaimsPrincipal claimsPrincipal, String name)

   at Volo.Abp.Authorization.PermissionRequirementHandler.HandleRequirementAsync(AuthorizationHandlerContext context, PermissionRequirement requirement)

   at Microsoft.AspNetCore.Authorization.AuthorizationHandler`1.HandleAsync(AuthorizationHandlerContext context)

   at Microsoft.AspNetCore.Authorization.DefaultAuthorizationService.AuthorizeAsync(ClaimsPrincipal user, Object resource, IEnumerable`1 requirements)

   at Microsoft.AspNetCore.Components.Authorization.AuthorizeViewCore.IsAuthorizedAsync(ClaimsPrincipal user)

   at Microsoft.AspNetCore.Components.Authorization.AuthorizeViewCore.OnParametersSetAsync()

   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)

修复方案 #

• 调整HttpClient生命周期与连接池配置
  在模块的ConfigureServices方法中显式配置HttpClient为单例，并延长连接池生命周期，避免Handler被提前释放：

  context.Services.AddHttpClient("AbpRemoteClient")
      .ConfigurePrimaryHttpMessageHandler(() => new SocketsHttpHandler
      {
          PooledConnectionLifetime = TimeSpan.FromMinutes(30),
          PooledConnectionIdleTimeout = TimeSpan.FromMinutes(10)
      });
  

• 自定义缓存应用配置客户端
  替换默认的MvcCachedApplicationConfigurationClient，使用IHttpClientFactory创建临时HttpClient实例，避免复用已释放的Handler：

  [Dependency(ReplaceServices = true)]
  public class CustomCachedApplicationConfigurationClient : MvcCachedApplicationConfigurationClient
  {
      private readonly IHttpClientFactory _httpClientFactory;
      private readonly IServiceProvider _serviceProvider;
  
      public CustomCachedApplicationConfigurationClient(
          IDistributedCache<ApplicationConfigurationDto> cache,
          IHttpClientFactory httpClientFactory,
          IOptions<AbpApplicationConfigurationClientOptions> options,
          IServiceProvider serviceProvider)
          : base(cache, httpClientFactory.CreateClient("AbpRemoteClient"), options)
      {
          _httpClientFactory = httpClientFactory;
          _serviceProvider = serviceProvider;
      }
  
      protected override async Task<ApplicationConfigurationDto> GetRemoteConfigurationAsync()
      {
          using var client = _httpClientFactory.CreateClient("AbpRemoteClient");
          var proxy = new AbpApplicationConfigurationClientProxy(client, _serviceProvider);
          return await proxy.GetAsync(new ApplicationConfigurationRequestOptions());
      }
  }
  

• 禁用HttpClient Handler自动清理
  在Program.cs中配置HttpClient工厂，禁止请求后自动释放Handler：

  builder.Services.AddHttpClient()
      .ConfigureHttpMessageHandlerBuilder(builder =>
      {
          if (builder.PrimaryHandler is SocketsHttpHandler handler)
          {
              handler.DisposeHandlerAfterRequest = false;
          }
      });
  

• 升级ABP补丁版本
  将ABP相关NuGet包升级到v7.1.x系列的最新补丁版本，官方可能已修复此类资源释放的生命周期问题。

内容的提问来源于stack exchange，提问作者Hyppothalamus