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TaskCanceledException on SignalR ChatHub #8890

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Ricavir created

Hi,

As mentioned in this post, I'm getting a WARN log on UserFriendsCache class in following line : var user = AsyncHelper.RunSync(() => _userManager.FindByIdAsync(userIdentifier.UserId.ToString()));

I think it is caused when a user is disconnected.

This is causing a lot of log lines :

WARN  2020-04-19 23:40:31,807 [15   ] EN_SOFT.MyAPP.Web.Chat.SignalR.ChatHub - System.Threading.Tasks.TaskCanceledException: A task was canceled.
   at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.AsyncEnumerator.InitializeReaderAsync(DbContext _, Boolean result, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.AsyncEnumerator.MoveNextAsync()
   at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken)
   at Abp.EntityFrameworkCore.Repositories.EfCoreRepositoryBase`3.FirstOrDefaultAsync(TPrimaryKey id)
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InternalInterceptAsynchronous[TResult](IInvocation invocation)
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InternalInterceptAsynchronous[TResult](IInvocation invocation)
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InternalInterceptAsynchronous[TResult](IInvocation invocation)
   at Nito.AsyncEx.Synchronous.TaskExtensions.WaitAndUnwrapException[TResult](Task`1 task)
   at Nito.AsyncEx.AsyncContext.<>c__DisplayClass16_0`1.&lt;Run&gt;b__0(Task`1 t)
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.Tasks.Task.&lt;&gt;c.&lt;.cctor&gt;b__274_0(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location where exception was thrown ---
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
--- End of stack trace from previous location where exception was thrown ---
   at Nito.AsyncEx.Synchronous.TaskExtensions.WaitAndUnwrapException[TResult](Task`1 task)
   at Nito.AsyncEx.AsyncContext.Run[TResult](Func`1 action)
   at Abp.Threading.AsyncHelper.RunSync[TResult](Func`1 func)
   at MyCOMPANY.MyAPP.Friendships.Cache.UserFriendsCache.GetUserFriendsCacheItemInternal(UserIdentifier userIdentifier) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\Cache\UserFriendsCache.cs:line 195
   at Castle.Proxies.UserFriendsCacheProxy.GetUserFriendsCacheItemInternal_callback(UserIdentifier userIdentifier)
   at Castle.Proxies.Invocations.UserFriendsCache_GetUserFriendsCacheItemInternal.InvokeMethodOnTarget()
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InterceptSynchronous(IInvocation invocation)
   at Castle.DynamicProxy.AsyncDeterminationInterceptor.Intercept(IInvocation invocation)
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Castle.Proxies.UserFriendsCacheProxy.GetUserFriendsCacheItemInternal(UserIdentifier userIdentifier)
   at MyCOMPANY.MyAPP.Friendships.Cache.UserFriendsCache.<>c__DisplayClass8_0.<GetCacheItem>b__0(String f) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\Cache\UserFriendsCache.cs:line 46
   at Abp.Runtime.Caching.CacheExtensions.<>c__DisplayClass5_0`2.&lt;Get&gt;b__0(String k)
   at Abp.Runtime.Caching.AbpCacheBase`2.Get(TKey key, Func`2 factory)
   at Abp.Runtime.Caching.CacheExtensions.Get[TKey,TValue](ICache cache, TKey key, Func`2 factory)
   at MyCOMPANY.MyAPP.Friendships.Cache.UserFriendsCache.GetCacheItem(UserIdentifier userIdentifier) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\Cache\UserFriendsCache.cs:line 44
   at Castle.Proxies.UserFriendsCacheProxy.GetCacheItem_callback(UserIdentifier userIdentifier)
   at Castle.Proxies.Invocations.UserFriendsCache_GetCacheItem.InvokeMethodOnTarget()
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InterceptSynchronous(IInvocation invocation)
   at Castle.DynamicProxy.AsyncDeterminationInterceptor.Intercept(IInvocation invocation)
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Castle.Proxies.UserFriendsCacheProxy.GetCacheItem(UserIdentifier userIdentifier)
   at MyCOMPANY.MyAPP.Friendships.ChatUserStateWatcher.NotifyUserConnectionStateChange(UserIdentifier user, Boolean isConnected) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\ChatUserStateWatcher.cs:line 45
   at MyCOMPANY.MyAPP.Friendships.ChatUserStateWatcher.OnlineClientManager_UserDisconnected(Object sender, OnlineUserEventArgs e) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\ChatUserStateWatcher.cs:line 41
   at Abp.RealTime.OnlineClientManager.Remove(String connectionId)
   at Abp.AspNetCore.SignalR.Hubs.OnlineClientHubBase.OnDisconnectedAsync(Exception exception)
System.Threading.Tasks.TaskCanceledException: A task was canceled.
   at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.AsyncEnumerator.InitializeReaderAsync(DbContext _, Boolean result, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.AsyncEnumerator.MoveNextAsync()
   at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken)
   at Abp.EntityFrameworkCore.Repositories.EfCoreRepositoryBase`3.FirstOrDefaultAsync(TPrimaryKey id)
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InternalInterceptAsynchronous[TResult](IInvocation invocation)
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InternalInterceptAsynchronous[TResult](IInvocation invocation)
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InternalInterceptAsynchronous[TResult](IInvocation invocation)
   at Nito.AsyncEx.Synchronous.TaskExtensions.WaitAndUnwrapException[TResult](Task`1 task)
   at Nito.AsyncEx.AsyncContext.<>c__DisplayClass16_0`1.&lt;Run&gt;b__0(Task`1 t)
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.Tasks.Task.&lt;&gt;c.&lt;.cctor&gt;b__274_0(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location where exception was thrown ---
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
--- End of stack trace from previous location where exception was thrown ---
   at Nito.AsyncEx.Synchronous.TaskExtensions.WaitAndUnwrapException[TResult](Task`1 task)
   at Nito.AsyncEx.AsyncContext.Run[TResult](Func`1 action)
   at Abp.Threading.AsyncHelper.RunSync[TResult](Func`1 func)
   at MyCOMPANY.MyAPP.Friendships.Cache.UserFriendsCache.GetUserFriendsCacheItemInternal(UserIdentifier userIdentifier) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\Cache\UserFriendsCache.cs:line 195
   at Castle.Proxies.UserFriendsCacheProxy.GetUserFriendsCacheItemInternal_callback(UserIdentifier userIdentifier)
   at Castle.Proxies.Invocations.UserFriendsCache_GetUserFriendsCacheItemInternal.InvokeMethodOnTarget()
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InterceptSynchronous(IInvocation invocation)
   at Castle.DynamicProxy.AsyncDeterminationInterceptor.Intercept(IInvocation invocation)
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Castle.Proxies.UserFriendsCacheProxy.GetUserFriendsCacheItemInternal(UserIdentifier userIdentifier)
   at MyCOMPANY.MyAPP.Friendships.Cache.UserFriendsCache.<>c__DisplayClass8_0.<GetCacheItem>b__0(String f) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\Cache\UserFriendsCache.cs:line 46
   at Abp.Runtime.Caching.CacheExtensions.<>c__DisplayClass5_0`2.&lt;Get&gt;b__0(String k)
   at Abp.Runtime.Caching.AbpCacheBase`2.Get(TKey key, Func`2 factory)
   at Abp.Runtime.Caching.CacheExtensions.Get[TKey,TValue](ICache cache, TKey key, Func`2 factory)
   at MyCOMPANY.MyAPP.Friendships.Cache.UserFriendsCache.GetCacheItem(UserIdentifier userIdentifier) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\Cache\UserFriendsCache.cs:line 44
   at Castle.Proxies.UserFriendsCacheProxy.GetCacheItem_callback(UserIdentifier userIdentifier)
   at Castle.Proxies.Invocations.UserFriendsCache_GetCacheItem.InvokeMethodOnTarget()
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Abp.Domain.Uow.UnitOfWorkInterceptor.InterceptSynchronous(IInvocation invocation)
   at Castle.DynamicProxy.AsyncDeterminationInterceptor.Intercept(IInvocation invocation)
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Castle.Proxies.UserFriendsCacheProxy.GetCacheItem(UserIdentifier userIdentifier)
   at MyCOMPANY.MyAPP.Friendships.ChatUserStateWatcher.NotifyUserConnectionStateChange(UserIdentifier user, Boolean isConnected) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\ChatUserStateWatcher.cs:line 45
   at MyCOMPANY.MyAPP.Friendships.ChatUserStateWatcher.OnlineClientManager_UserDisconnected(Object sender, OnlineUserEventArgs e) in D:\a\1\s\aspnet-core\src\MyCOMPANY.MyAPP.Core\Friendships\ChatUserStateWatcher.cs:line 41
   at Abp.RealTime.OnlineClientManager.Remove(String connectionId)
   at Abp.AspNetCore.SignalR.Hubs.OnlineClientHubBase.OnDisconnectedAsync(Exception exception)

I'm running on ASPNET CORE 3.1, Angular 9.1, Abp 5.5

Any fix possible for next deliveries ?

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1 Answer(s)
  • User Avatar
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    maliming created
    Support Team

    hi

    As mentioned in the previous question, this does not cause any problems, it just appears in the log.

    https://support.aspnetzero.com/QA/Questions/8611#answer-aea5d8f4-5722-5fa5-fb64-39f3b5c1af6e

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