EF6 无故内存泄漏
EF6 Memory leak without any reason
我发现这个问题已经有一段时间了，但我 100% 确定它正在发生，至少在我的机器上是这样。
我发现正是这一小段代码导致了内存泄漏，但我仍然不知道为什么。
for (int i = 0; i < 1000000; i++)
{
using (var db = new TestEntity())
{
db.Configuration.AutoDetectChangesEnabled = false;
db.Configuration.ValidateOnSaveEnabled = false;
// If I just create new Context everything is normal.
// I need to request anything
{
var any = (bool)db.Test.AsNoTracking().Any();
}
// Or more simply just in that way
// var any = db.Test.AsNoTracking().Any();
}
if (i % 1000 == 0)
{
Console.WriteLine(i.ToString());
}
}
这段代码非常简单，但我仍然看不出是什么导致了问题。
我正在单次迭代中创建新的上下文，然后 Dispose() 它。
我的 bool 变量是本地变量，从未使用过。我也在使用 Any() 返回布尔值而不是对对象的引用。
我不会同意 Garbage Collector 没时间收集 因为我会强迫他去 Collect() 它仍然在泄漏。
EF 团队还建议尽可能短的时间使用 Context。
更重要的是，此泄漏 going/happening 进入非托管内存。
使用 ANTS Memory Profiler 的结果是我可以看到有泄漏，但我仍然不知道为什么。
此代码在 1 分钟后（~200k 次迭代）在 EntityFramework.dll 中产生 WhosebugException：
An unhandled exception of type 'System.WhosebugException' occurred in EntityFramework.dll
在非托管内存中，我可以看到大约 200k 个大小为 8192 字节的对象。
这不是不切实际的情况。这是阻止我的真正问题。
这是我的真实软件中发生的事情的非常基本的模型。我需要首先解析不同格式的数百万行，然后检查数据库中是否存在记录。
要重现您需要的问题：
主程序：
using System;
using System.Linq;
namespace ConsoleApplication31
{
class Program
{
static void Main(string[] args)
{
var test = new TestClass();
test.Test();
Console.ReadLine();
}
}
public class TestClass
{
public void Test()
{
try
{
for (int i = 0; i < 1000000; i++)
{
using (var db = new TestEntity())
{
db.Configuration.AutoDetectChangesEnabled = false;
db.Configuration.ValidateOnSaveEnabled = false;
{
var any = (bool)db.Test.AsNoTracking().Any();
}
}
if (i % 1000 == 0)
{
Console.WriteLine(i.ToString());
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
}
}
和数据库模型实体：
namespace ConsoleApplication31
{
using System.Data.Entity;
public partial class TestEntity : DbContext
{
public TestEntity()
: base("name=TestEntityConnectionString")
{
}
public virtual DbSet<Test> Test { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
Database.SetInitializer<TestEntity>(null);
}
}
}
有测试Table:
using System.ComponentModel.DataAnnotations;
namespace ConsoleApplication31
{
public partial class Test
{
[Key]
[Required]
public long TestId { get; set; }
[Required]
public string TestName { get; set; }
[Required]
public string TestDescription { get; set; }
}
}
我的配置：
a) 4C/8T 16GB 内存，Windows 10 14393 (RTM)，Visual Studio 2015，Sql 服务器 2016
b) 2C/4T 8GB内存，完全相同的系统（相同的磁盘，连接到其他机器）
在 .NET Framework 版本上测试：4.5、4.5.2、4.6.1、4.6.2
在 Entity Framework 版本上测试：6.0.0、6.1.3
我将不胜感激。
内存使用量约为 700MB 时的调用堆栈：
[管理到本机过渡]
System.Data.dll!SNINativeMethodWrapper.SNIReadSyncOverAsync(System.Runtime.InteropServices.SafeHandle pConn = {System.Data.SqlClient.SNIHandle}, ref System.IntPtr packet = {System.IntPtr}, int timeout) Unknown
System.Data.dll!System.Data.SqlClient.TdsParserStateObject.ReadSniSyncOverAsync() Unknown
System.Data.dll!System.Data.SqlClient.TdsParserStateObject.TryReadNetworkPacket() Unknown
System.Data.dll!System.Data.SqlClient.TdsParserStateObject.TryPrepareBuffer() Unknown
System.Data.dll!System.Data.SqlClient.TdsParserStateObject.TryReadByte(out byte value = 0) Unknown
System.Data.dll!System.Data.SqlClient.TdsParser.TryRun(System.Data.SqlClient.RunBehavior runBehavior = ReturnImmediately, System.Data.SqlClient.SqlCommand cmdHandler = {System.Data.SqlClient.SqlCommand}, System.Data.SqlClient.SqlDataReader dataStream = {System.Data.SqlClient.SqlDataReader}, System.Data.SqlClient.BulkCopySimpleResultSet bulkCopyHandler = null, System.Data.SqlClient.TdsParserStateObject stateObj, out bool dataReady = false) Unknown
System.Data.dll!System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() Unknown
System.Data.dll!System.Data.SqlClient.SqlDataReader.MetaData.get() Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.FinishExecuteReader(System.Data.SqlClient.SqlDataReader ds = {System.Data.SqlClient.SqlDataReader}, System.Data.SqlClient.RunBehavior runBehavior, string resetOptionsString, bool isInternal, bool forDescribeParameterEncryption) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(System.Data.CommandBehavior cmdBehavior, System.Data.SqlClient.RunBehavior runBehavior, bool returnStream, bool async, int timeout, out System.Threading.Tasks.Task task, bool asyncWrite, bool inRetry, System.Data.SqlClient.SqlDataReader ds, bool describeParameterEncryptionRequest) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.RunExecuteReader(System.Data.CommandBehavior cmdBehavior, System.Data.SqlClient.RunBehavior runBehavior, bool returnStream, string method, System.Threading.Tasks.TaskCompletionSource<object> completion, int timeout, out System.Threading.Tasks.Task task, out bool usedCache, bool asyncWrite, bool inRetry) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.RunExecuteReader(System.Data.CommandBehavior cmdBehavior, System.Data.SqlClient.RunBehavior runBehavior, bool returnStream, string method) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.ExecuteReader(System.Data.CommandBehavior behavior, string method) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(System.Data.CommandBehavior behavior) Unknown
System.Data.dll!System.Data.Common.DbCommand.ExecuteReader(System.Data.CommandBehavior behavior) Unknown
EntityFramework.dll!System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader.AnonymousMethod__c(System.Data.Common.DbCommand t, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader> c) Unknown
EntityFramework.dll!System.Data.Entity.Infrastructure.Interception.InternalDispatcher<System.Data.Entity.Infrastructure.Interception.IDbCommandInterceptor>.Dispatch<System.Data.Common.DbCommand, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader>, System.Data.Common.DbDataReader>(System.Data.Common.DbCommand target, System.Func<System.Data.Common.DbCommand, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader>, System.Data.Common.DbDataReader> operation, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader> interceptionContext, System.Action<System.Data.Entity.Infrastructure.Interception.IDbCommandInterceptor, System.Data.Common.DbCommand, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader>> executing, System.Action<System.Data.Entity.Infrastructure.Interception.IDbCommandInterceptor, System.Data.Common.DbCommand, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader>> executed) Unknown
EntityFramework.dll!System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(System.Data.Common.DbCommand command, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext interceptionContext) Unknown
EntityFramework.dll!System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader(System.Data.CommandBehavior behavior) Unknown
System.Data.dll!System.Data.Common.DbCommand.ExecuteReader(System.Data.CommandBehavior behavior) Unknown
EntityFramework.dll!System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(System.Data.Entity.Core.EntityClient.EntityCommand entityCommand, System.Data.CommandBehavior behavior) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute<bool>(System.Data.Entity.Core.Objects.ObjectContext context = {System.Data.Entity.Core.Objects.ObjectContext}, System.Data.Entity.Core.Objects.ObjectParameterCollection parameterValues) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectQuery<bool>.GetResults.AnonymousMethod__6() Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction<System.__Canon>(System.Func<System.__Canon> func, System.Data.Entity.Infrastructure.IDbExecutionStrategy executionStrategy, bool startLocalTransaction, bool releaseConnectionOnSuccess = false) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectQuery<bool>.GetResults.AnonymousMethod__5() Unknown
EntityFramework.SqlServer.dll!System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute<System.Data.Entity.Core.Objects.ObjectResult<bool>>(System.Func<System.Data.Entity.Core.Objects.ObjectResult<bool>> operation) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectQuery<bool>.GetResults(System.Data.Entity.Core.Objects.MergeOption? forMergeOption) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectQuery<bool>.System.Collections.Generic.IEnumerable<T>.GetEnumerator.AnonymousMethod__0() Unknown
EntityFramework.dll!System.Data.Entity.Internal.LazyEnumerator<bool>.MoveNext() Unknown
System.Core.dll!System.Linq.Enumerable.Single<bool>(System.Collections.Generic.IEnumerable<bool> source) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.GetElementFunction.AnonymousMethod__3<bool>(System.Collections.Generic.IEnumerable<bool> sequence) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle<bool>(System.Collections.Generic.IEnumerable<bool> query, System.Linq.Expressions.Expression queryRoot) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.Execute<bool>(System.Linq.Expressions.Expression expression) Unknown
EntityFramework.dll!System.Data.Entity.Internal.Linq.DbQueryProvider.Execute<bool>(System.Linq.Expressions.Expression expression) Unknown
System.Core.dll!System.Linq.Queryable.Any<ConsoleApplication31.Test>(System.Linq.IQueryable<ConsoleApplication31.Test> source) Unknown
> ConsoleApplication31.exe!ConsoleApplication31.TestClass.Test() Line 31 C#
ConsoleApplication31.exe!ConsoleApplication31.Program.Main(string[] args = {string[0]}) Line 12 C#
[Native to Managed Transition]
[Managed to Native Transition]
mscorlib.dll!System.AppDomain.ExecuteAssembly(string assemblyFile, System.Security.Policy.Evidence assemblySecurity, string[] args) Unknown
Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() Unknown
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) Unknown
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Unknown
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() Unknown
我仍然不知道为什么会出现此问题，但现在我知道它与我的 Sql 服务器安装有关。
当我使用安装在 Hyper-V 中的 Sql 服务器时，一切似乎都很好。
当我更改连接字符串以指向我的本地主机 Sql 服务器实例时，我遇到了这个奇怪的泄漏。
目前这对我来说是一种解决方案，至少我可以继续前进。
我发现这个问题已经有一段时间了，但我 100% 确定它正在发生，至少在我的机器上是这样。
我发现正是这一小段代码导致了内存泄漏，但我仍然不知道为什么。
for (int i = 0; i < 1000000; i++)
{
using (var db = new TestEntity())
{
db.Configuration.AutoDetectChangesEnabled = false;
db.Configuration.ValidateOnSaveEnabled = false;
// If I just create new Context everything is normal.
// I need to request anything
{
var any = (bool)db.Test.AsNoTracking().Any();
}
// Or more simply just in that way
// var any = db.Test.AsNoTracking().Any();
}
if (i % 1000 == 0)
{
Console.WriteLine(i.ToString());
}
}
这段代码非常简单，但我仍然看不出是什么导致了问题。
我正在单次迭代中创建新的上下文，然后 Dispose() 它。
我的 bool 变量是本地变量，从未使用过。我也在使用 Any() 返回布尔值而不是对对象的引用。
我不会同意 Garbage Collector 没时间收集 因为我会强迫他去 Collect() 它仍然在泄漏。
EF 团队还建议尽可能短的时间使用 Context。
更重要的是，此泄漏 going/happening 进入非托管内存。 使用 ANTS Memory Profiler 的结果是我可以看到有泄漏，但我仍然不知道为什么。
此代码在 1 分钟后（~200k 次迭代）在 EntityFramework.dll 中产生 WhosebugException：
An unhandled exception of type 'System.WhosebugException' occurred in EntityFramework.dll
在非托管内存中，我可以看到大约 200k 个大小为 8192 字节的对象。
这不是不切实际的情况。这是阻止我的真正问题。
这是我的真实软件中发生的事情的非常基本的模型。我需要首先解析不同格式的数百万行，然后检查数据库中是否存在记录。
要重现您需要的问题： 主程序：
using System;
using System.Linq;
namespace ConsoleApplication31
{
class Program
{
static void Main(string[] args)
{
var test = new TestClass();
test.Test();
Console.ReadLine();
}
}
public class TestClass
{
public void Test()
{
try
{
for (int i = 0; i < 1000000; i++)
{
using (var db = new TestEntity())
{
db.Configuration.AutoDetectChangesEnabled = false;
db.Configuration.ValidateOnSaveEnabled = false;
{
var any = (bool)db.Test.AsNoTracking().Any();
}
}
if (i % 1000 == 0)
{
Console.WriteLine(i.ToString());
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
}
}
和数据库模型实体：
namespace ConsoleApplication31
{
using System.Data.Entity;
public partial class TestEntity : DbContext
{
public TestEntity()
: base("name=TestEntityConnectionString")
{
}
public virtual DbSet<Test> Test { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
Database.SetInitializer<TestEntity>(null);
}
}
}
有测试Table:
using System.ComponentModel.DataAnnotations;
namespace ConsoleApplication31
{
public partial class Test
{
[Key]
[Required]
public long TestId { get; set; }
[Required]
public string TestName { get; set; }
[Required]
public string TestDescription { get; set; }
}
}
我的配置：
a) 4C/8T 16GB 内存，Windows 10 14393 (RTM)，Visual Studio 2015，Sql 服务器 2016
b) 2C/4T 8GB内存，完全相同的系统（相同的磁盘，连接到其他机器）
在 .NET Framework 版本上测试：4.5、4.5.2、4.6.1、4.6.2
在 Entity Framework 版本上测试：6.0.0、6.1.3
我将不胜感激。
内存使用量约为 700MB 时的调用堆栈： [管理到本机过渡]
System.Data.dll!SNINativeMethodWrapper.SNIReadSyncOverAsync(System.Runtime.InteropServices.SafeHandle pConn = {System.Data.SqlClient.SNIHandle}, ref System.IntPtr packet = {System.IntPtr}, int timeout) Unknown
System.Data.dll!System.Data.SqlClient.TdsParserStateObject.ReadSniSyncOverAsync() Unknown
System.Data.dll!System.Data.SqlClient.TdsParserStateObject.TryReadNetworkPacket() Unknown
System.Data.dll!System.Data.SqlClient.TdsParserStateObject.TryPrepareBuffer() Unknown
System.Data.dll!System.Data.SqlClient.TdsParserStateObject.TryReadByte(out byte value = 0) Unknown
System.Data.dll!System.Data.SqlClient.TdsParser.TryRun(System.Data.SqlClient.RunBehavior runBehavior = ReturnImmediately, System.Data.SqlClient.SqlCommand cmdHandler = {System.Data.SqlClient.SqlCommand}, System.Data.SqlClient.SqlDataReader dataStream = {System.Data.SqlClient.SqlDataReader}, System.Data.SqlClient.BulkCopySimpleResultSet bulkCopyHandler = null, System.Data.SqlClient.TdsParserStateObject stateObj, out bool dataReady = false) Unknown
System.Data.dll!System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() Unknown
System.Data.dll!System.Data.SqlClient.SqlDataReader.MetaData.get() Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.FinishExecuteReader(System.Data.SqlClient.SqlDataReader ds = {System.Data.SqlClient.SqlDataReader}, System.Data.SqlClient.RunBehavior runBehavior, string resetOptionsString, bool isInternal, bool forDescribeParameterEncryption) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(System.Data.CommandBehavior cmdBehavior, System.Data.SqlClient.RunBehavior runBehavior, bool returnStream, bool async, int timeout, out System.Threading.Tasks.Task task, bool asyncWrite, bool inRetry, System.Data.SqlClient.SqlDataReader ds, bool describeParameterEncryptionRequest) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.RunExecuteReader(System.Data.CommandBehavior cmdBehavior, System.Data.SqlClient.RunBehavior runBehavior, bool returnStream, string method, System.Threading.Tasks.TaskCompletionSource<object> completion, int timeout, out System.Threading.Tasks.Task task, out bool usedCache, bool asyncWrite, bool inRetry) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.RunExecuteReader(System.Data.CommandBehavior cmdBehavior, System.Data.SqlClient.RunBehavior runBehavior, bool returnStream, string method) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.ExecuteReader(System.Data.CommandBehavior behavior, string method) Unknown
System.Data.dll!System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(System.Data.CommandBehavior behavior) Unknown
System.Data.dll!System.Data.Common.DbCommand.ExecuteReader(System.Data.CommandBehavior behavior) Unknown
EntityFramework.dll!System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader.AnonymousMethod__c(System.Data.Common.DbCommand t, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader> c) Unknown
EntityFramework.dll!System.Data.Entity.Infrastructure.Interception.InternalDispatcher<System.Data.Entity.Infrastructure.Interception.IDbCommandInterceptor>.Dispatch<System.Data.Common.DbCommand, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader>, System.Data.Common.DbDataReader>(System.Data.Common.DbCommand target, System.Func<System.Data.Common.DbCommand, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader>, System.Data.Common.DbDataReader> operation, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader> interceptionContext, System.Action<System.Data.Entity.Infrastructure.Interception.IDbCommandInterceptor, System.Data.Common.DbCommand, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader>> executing, System.Action<System.Data.Entity.Infrastructure.Interception.IDbCommandInterceptor, System.Data.Common.DbCommand, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext<System.Data.Common.DbDataReader>> executed) Unknown
EntityFramework.dll!System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(System.Data.Common.DbCommand command, System.Data.Entity.Infrastructure.Interception.DbCommandInterceptionContext interceptionContext) Unknown
EntityFramework.dll!System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader(System.Data.CommandBehavior behavior) Unknown
System.Data.dll!System.Data.Common.DbCommand.ExecuteReader(System.Data.CommandBehavior behavior) Unknown
EntityFramework.dll!System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(System.Data.Entity.Core.EntityClient.EntityCommand entityCommand, System.Data.CommandBehavior behavior) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute<bool>(System.Data.Entity.Core.Objects.ObjectContext context = {System.Data.Entity.Core.Objects.ObjectContext}, System.Data.Entity.Core.Objects.ObjectParameterCollection parameterValues) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectQuery<bool>.GetResults.AnonymousMethod__6() Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction<System.__Canon>(System.Func<System.__Canon> func, System.Data.Entity.Infrastructure.IDbExecutionStrategy executionStrategy, bool startLocalTransaction, bool releaseConnectionOnSuccess = false) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectQuery<bool>.GetResults.AnonymousMethod__5() Unknown
EntityFramework.SqlServer.dll!System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute<System.Data.Entity.Core.Objects.ObjectResult<bool>>(System.Func<System.Data.Entity.Core.Objects.ObjectResult<bool>> operation) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectQuery<bool>.GetResults(System.Data.Entity.Core.Objects.MergeOption? forMergeOption) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ObjectQuery<bool>.System.Collections.Generic.IEnumerable<T>.GetEnumerator.AnonymousMethod__0() Unknown
EntityFramework.dll!System.Data.Entity.Internal.LazyEnumerator<bool>.MoveNext() Unknown
System.Core.dll!System.Linq.Enumerable.Single<bool>(System.Collections.Generic.IEnumerable<bool> source) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.GetElementFunction.AnonymousMethod__3<bool>(System.Collections.Generic.IEnumerable<bool> sequence) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle<bool>(System.Collections.Generic.IEnumerable<bool> query, System.Linq.Expressions.Expression queryRoot) Unknown
EntityFramework.dll!System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.Execute<bool>(System.Linq.Expressions.Expression expression) Unknown
EntityFramework.dll!System.Data.Entity.Internal.Linq.DbQueryProvider.Execute<bool>(System.Linq.Expressions.Expression expression) Unknown
System.Core.dll!System.Linq.Queryable.Any<ConsoleApplication31.Test>(System.Linq.IQueryable<ConsoleApplication31.Test> source) Unknown
> ConsoleApplication31.exe!ConsoleApplication31.TestClass.Test() Line 31 C#
ConsoleApplication31.exe!ConsoleApplication31.Program.Main(string[] args = {string[0]}) Line 12 C#
[Native to Managed Transition]
[Managed to Native Transition]
mscorlib.dll!System.AppDomain.ExecuteAssembly(string assemblyFile, System.Security.Policy.Evidence assemblySecurity, string[] args) Unknown
Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() Unknown
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) Unknown
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Unknown
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() Unknown
我仍然不知道为什么会出现此问题，但现在我知道它与我的 Sql 服务器安装有关。
当我使用安装在 Hyper-V 中的 Sql 服务器时，一切似乎都很好。
当我更改连接字符串以指向我的本地主机 Sql 服务器实例时，我遇到了这个奇怪的泄漏。
目前这对我来说是一种解决方案，至少我可以继续前进。