Memory leak in serilog?

See original GitHub issue

Hi, I’ve been working with Microsoft on a sporadic memory leak in an Azure Asp.net Core App Service running in .Net 4.7.2… When this leak occurs, the process goes from about 500MB in size to 8GB in size in less than two minutes. The Microsoft support person told me that it’s an issue when Serilog is trying to log an exception, it enters some loop. I’m not 100% sure if I agree with this, but here’s what she wrote:

I look into one of the manual dumps you took, top objects in memory: It appears exceptions causing your loggings to behave unexpectedly. The number of Serilog objects closed to 50 millions and almost 2 G in size.


0x00007FFEEF765818      521,319   108,434,352 Microsoft.EntityFrameworkCore.ChangeTracking.Internal.Snapshot,System.Nullable,System.Nullable,System.Nullable,System.Nullable,System.Nullable,System.Guid,System.Guid,System.Guid,System.String>
0x00007FFEEC9FEED8    4,657,095   111,770,280 Serilog.Events.DictionaryValue
0x00007FFEEF7298E0      677,319   119,208,144 Microsoft.EntityFrameworkCore.ChangeTracking.Internal.Snapshot,System.Nullable,System.Nullable,System.Nullable,System.Nullable,System.Nullable,System.Guid>
0x00007FFF45C94FB8      940,339   120,427,000 System.Collections.Generic.HashSet+Slot[]
0x00007FFEED067B50      521,319   129,287,112 MyApp.Modules.MyEntity1.MyEntityMyEntity
0x00007FFEEE646130    1,734,319   138,745,520 Microsoft.EntityFrameworkCore.ChangeTracking.Internal.InternalClrEntityEntry
0x00007FFEED0674E8      677,298   140,877,984 MyApp.Modules.MyEntity1.MyEntity
0x00007FFF49BD6BA8    3,759,464   158,934,132 System.String
0x00007FFF49BC1BF8    9,969,688   319,030,016 System.Guid
0x00007FFEF026EA68    4,657,087   372,566,960 System.Collections.Generic.Dictionary
0x000002044FE1CDD0    5,837,862   383,222,966 Free
0x00007FFF494C7CF8    5,745,185   459,614,800 System.Collections.Generic.Dictionary
0x00007FFF49BD9490   14,581,219   785,463,224 System.Int32[]
0x00007FFEF026F300    4,656,974 1,018,012,800 System.Collections.Generic.Dictionary+Entry[]
0x00007FFF49BA6730    5,744,607 1,187,403,888 System.Collections.Generic.Dictionary+Entry[]
0x00007FFEEC9FAF18   49,885,180 1,197,244,320 Serilog.Events.ScalarValue
Total 126,186,519 objects, Total size: 7,939,099,934

Please take a look at this one thread, I am attaching others in a text file for you to check. I hope it helps you to focus on the part of your code that’s having issue. You can look into the exceptions in your logs and try to fix them, and also see if you can change your logging logic. I would remove it since it’s causing more problem!

Let us know if you have any questions.

0:016> knL
# Child-SP          RetAddr           Call Site
00 0000008f`caa721a8 00007fff`56873acf ntdll!ZwWaitForSingleObject+0x14
01 0000008f`caa721b0 00007fff`4bf6cb27 KERNELBASE!WaitForSingleObjectEx+0x8f
02 0000008f`caa72250 00007fff`4bf6cadf clr!CLREventWaitHelper2+0x3c
03 0000008f`caa72290 00007fff`4bf6ca5c clr!CLREventWaitHelper+0x1f
04 0000008f`caa722f0 00007fff`4bf5e0c4 clr!CLREventBase::WaitEx+0x7c
05 (Inline Function) --------`-------- clr!CLREventBase::Wait+0x24
06 0000008f`caa72380 00007fff`4bf5e638 clr!SVR::gc_heap::wait_for_gc_done+0x55
07 0000008f`caa723b0 00007fff`4bf5e6bc clr!SVR::GCHeap::GarbageCollectGeneration+0x108
08 0000008f`caa72410 00007fff`4bf6f1f4 clr!SVR::gc_heap::trigger_gc_for_alloc+0x2c
09 (Inline Function) --------`-------- clr!SVR::gc_heap::try_allocate_more_space+0x1c9
0a (Inline Function) --------`-------- clr!SVR::gc_heap::allocate_more_space+0x1e1
0b (Inline Function) --------`-------- clr!SVR::gc_heap::allocate+0x225
0c (Inline Function) --------`-------- clr!SVR::GCHeap::Alloc+0x2ae
0d (Inline Function) --------`-------- clr!Alloc+0x662
0e (Inline Function) --------`-------- clr!AllocateObject+0x74b
0f 0000008f`caa72450 00007ffe`efca1eb0 clr!JIT_New+0x867
10 0000008f`caa72800 00007ffe`efc14b3e Serilog!Serilog.Capturing.PropertyValueConverter.<TryConvertEnumerable>g__MapToDictionaryElements14_0(System.Collections.IDictionary, Serilog.Parsing.Destructuring)+0x20
11 0000008f`caa72850 00007ffe`ec7f7446 Serilog!Serilog.Capturing.PropertyValueConverter.TryConvertEnumerable(System.Object, Serilog.Parsing.Destructuring, System.Type, Serilog.Events.LogEventPropertyValue ByRef)+0x7e
12 0000008f`caa728b0 00007ffe`efca2836 Serilog!Serilog.Capturing.PropertyValueConverter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring, Int32)+0x156
13 0000008f`caa72950 00007ffe`efca2bd5 Serilog!Serilog.Capturing.PropertyValueConverter+DepthLimiter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring)+0x56
14 0000008f`caa729a0 00007fff`45bc8237 Serilog!Serilog.Capturing.PropertyValueConverter+<<TryConvertEnumerable>g__MapToSequenceElements14_1>d.MoveNext()+0xe5
15 0000008f`caa729f0 00007fff`45bc803b System_Core_ni!System.Linq.Buffer`1[[System.Collections.Generic.KeyValuePair`2[[System.__Canon, mscorlib],[System.__Canon, mscorlib]], mscorlib]]..ctor(System.Collections.Generic.IEnumerable`1<System.Collections.Generic.KeyValuePair`2<System.__Canon,System.__Canon>>)+0xffffffff`ffff5887
16 0000008f`caa72a80 00007ffe`ef360b0c System_Core_ni!System.Linq.Enumerable.ToArray[[System.Linq.Parallel.Pair`2[[System.Decimal, mscorlib],[System.Int64, mscorlib]], System.Core]](System.Collections.Generic.IEnumerable`1<System.Linq.Parallel.Pair`2<System.Decimal,Int64>>)+0xffffffff`ffd49a2b
17 0000008f`caa72af0 00007ffe`efc14b91 Serilog!Serilog.Events.SequenceValue..ctor(System.Collections.Generic.IEnumerable`1<Serilog.Events.LogEventPropertyValue>)+0x1c
18 0000008f`caa72b20 00007ffe`ec7f7446 Serilog!Serilog.Capturing.PropertyValueConverter.TryConvertEnumerable(System.Object, Serilog.Parsing.Destructuring, System.Type, Serilog.Events.LogEventPropertyValue ByRef)+0xd1
19 0000008f`caa72b80 00007ffe`efca2836 Serilog!Serilog.Capturing.PropertyValueConverter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring, Int32)+0x156
1a 0000008f`caa72c20 00007ffe`efca26f0 Serilog!Serilog.Capturing.PropertyValueConverter+DepthLimiter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring)+0x56
1b 0000008f`caa72c70 00007fff`45bd5218 Serilog!Serilog.Capturing.PropertyValueConverter+<<TryConvertEnumerable>g__MapToDictionaryElements14_0>d.MoveNext()+0x150
1c 0000008f`caa72cc0 00007ffe`efca2492 System_Core_ni!System.Linq.Enumerable.ToDictionary[[System.__Canon, mscorlib],[System.__Canon, mscorlib],[System.__Canon, mscorlib]](System.Collections.Generic.IEnumerable`1<System.__Canon>, System.Func`2<System.__Canon,System.__Canon>, System.Func`2<System.__Canon,System.__Canon>, System.Collections.Generic.IEqualityComparer`1<System.__Canon>)+0xffffffff`fffffa58
1d 0000008f`caa72d60 00007ffe`efc14b49 Serilog!Serilog.Events.DictionaryValue..ctor(System.Collections.Generic.IEnumerable`1<System.Collections.Generic.KeyValuePair`2<Serilog.Events.ScalarValue,Serilog.Events.LogEventPropertyValue>>)+0x102
1e 0000008f`caa72db0 00007ffe`ec7f7446 Serilog!Serilog.Capturing.PropertyValueConverter.TryConvertEnumerable(System.Object, Serilog.Parsing.Destructuring, System.Type, Serilog.Events.LogEventPropertyValue ByRef)+0x89
1f 0000008f`caa72e10 00007ffe`efca2836 Serilog!Serilog.Capturing.PropertyValueConverter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring, Int32)+0x156
20 0000008f`caa72eb0 00007ffe`efca2bd5 Serilog!Serilog.Capturing.PropertyValueConverter+DepthLimiter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring)+0x56
21 0000008f`caa72f00 00007fff`45bc8237 Serilog!Serilog.Capturing.PropertyValueConverter+<<TryConvertEnumerable>g__MapToSequenceElements14_1>d.MoveNext()+0xe5
22 0000008f`caa72f50 00007fff`45bc803b System_Core_ni!System.Linq.Buffer`1[[System.Collections.Generic.KeyValuePair`2[[System.__Canon, mscorlib],[System.__Canon, mscorlib]], mscorlib]]..ctor(System.Collections.Generic.IEnumerable`1<System.Collections.Generic.KeyValuePair`2<System.__Canon,System.__Canon>>)+0xffffffff`ffff5887
23 0000008f`caa72fe0 00007ffe`ef360b0c System_Core_ni!System.Linq.Enumerable.ToArray[[System.Linq.Parallel.Pair`2[[System.Decimal, mscorlib],[System.Int64, mscorlib]], System.Core]](System.Collections.Generic.IEnumerable`1<System.Linq.Parallel.Pair`2<System.Decimal,Int64>>)+0xffffffff`ffd49a2b
24 0000008f`caa73050 00007ffe`efc14b91 Serilog!Serilog.Events.SequenceValue..ctor(System.Collections.Generic.IEnumerable`1<Serilog.Events.LogEventPropertyValue>)+0x1c
25 0000008f`caa73080 00007ffe`ec7f7446 Serilog!Serilog.Capturing.PropertyValueConverter.TryConvertEnumerable(System.Object, Serilog.Parsing.Destructuring, System.Type, Serilog.Events.LogEventPropertyValue ByRef)+0xd1
26 0000008f`caa730e0 00007ffe`efca2836 Serilog!Serilog.Capturing.PropertyValueConverter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring, Int32)+0x156
27 0000008f`caa73180 00007ffe`efca26f0 Serilog!Serilog.Capturing.PropertyValueConverter+DepthLimiter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring)+0x56
28 0000008f`caa731d0 00007fff`45bd5218 Serilog!Serilog.Capturing.PropertyValueConverter+<<TryConvertEnumerable>g__MapToDictionaryElements14_0>d.MoveNext()+0x150
29 0000008f`caa73220 00007ffe`efca2492 System_Core_ni!System.Linq.Enumerable.ToDictionary[[System.__Canon, mscorlib],[System.__Canon, mscorlib],[System.__Canon, mscorlib]](System.Collections.Generic.IEnumerable`1<System.__Canon>, System.Func`2<System.__Canon,System.__Canon>, System.Func`2<System.__Canon,System.__Canon>, System.Collections.Generic.IEqualityComparer`1<System.__Canon>)+0xffffffff`fffffa58
2a 0000008f`caa732c0 00007ffe`efc14b49 Serilog!Serilog.Events.DictionaryValue..ctor(System.Collections.Generic.IEnumerable`1<System.Collections.Generic.KeyValuePair`2<Serilog.Events.ScalarValue,Serilog.Events.LogEventPropertyValue>>)+0x102
2b 0000008f`caa73310 00007ffe`ec7f7446 Serilog!Serilog.Capturing.PropertyValueConverter.TryConvertEnumerable(System.Object, Serilog.Parsing.Destructuring, System.Type, Serilog.Events.LogEventPropertyValue ByRef)+0x89
2c 0000008f`caa73370 00007ffe`efca2836 Serilog!Serilog.Capturing.PropertyValueConverter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring, Int32)+0x156
2d 0000008f`caa73410 00007ffe`efca26f0 Serilog!Serilog.Capturing.PropertyValueConverter+DepthLimiter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring)+0x56
2e 0000008f`caa73460 00007fff`45bd5218 Serilog!Serilog.Capturing.PropertyValueConverter+<<TryConvertEnumerable>g__MapToDictionaryElements14_0>d.MoveNext()+0x150
2f 0000008f`caa734b0 00007ffe`efca2492 System_Core_ni!System.Linq.Enumerable.ToDictionary[[System.__Canon, mscorlib],[System.__Canon, mscorlib],[System.__Canon, mscorlib]](System.Collections.Generic.IEnumerable`1<System.__Canon>, System.Func`2<System.__Canon,System.__Canon>, System.Func`2<System.__Canon,System.__Canon>, System.Collections.Generic.IEqualityComparer`1<System.__Canon>)+0xffffffff`fffffa58
30 0000008f`caa73550 00007ffe`efc14b49 Serilog!Serilog.Events.DictionaryValue..ctor(System.Collections.Generic.IEnumerable`1<System.Collections.Generic.KeyValuePair`2<Serilog.Events.ScalarValue,Serilog.Events.LogEventPropertyValue>>)+0x102
31 0000008f`caa735a0 00007ffe`ec7f7446 Serilog!Serilog.Capturing.PropertyValueConverter.TryConvertEnumerable(System.Object, Serilog.Parsing.Destructuring, System.Type, Serilog.Events.LogEventPropertyValue ByRef)+0x89
32 0000008f`caa73600 00007ffe`efca2836 Serilog!Serilog.Capturing.PropertyValueConverter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring, Int32)+0x156
33 0000008f`caa736a0 00007ffe`efca2bd5 Serilog!Serilog.Capturing.PropertyValueConverter+DepthLimiter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring)+0x56
34 0000008f`caa736f0 00007fff`45bc81d8 Serilog!Serilog.Capturing.PropertyValueConverter+<<TryConvertEnumerable>g__MapToSequenceElements14_1>d.MoveNext()+0xe5
35 0000008f`caa73740 00007fff`45bc803b System_Core_ni!System.Linq.Buffer`1[[System.Collections.Generic.KeyValuePair`2[[System.__Canon, mscorlib],[System.__Canon, mscorlib]], mscorlib]]..ctor(System.Collections.Generic.IEnumerable`1<System.Collections.Generic.KeyValuePair`2<System.__Canon,System.__Canon>>)+0xffffffff`ffff5828
36 0000008f`caa737d0 00007ffe`ef360b0c System_Core_ni!System.Linq.Enumerable.ToArray[[System.Linq.Parallel.Pair`2[[System.Decimal, mscorlib],[System.Int64, mscorlib]], System.Core]](System.Collections.Generic.IEnumerable`1<System.Linq.Parallel.Pair`2<System.Decimal,Int64>>)+0xffffffff`ffd49a2b
37 0000008f`caa73840 00007ffe`efc14b91 Serilog!Serilog.Events.SequenceValue..ctor(System.Collections.Generic.IEnumerable`1<Serilog.Events.LogEventPropertyValue>)+0x1c
38 0000008f`caa73870 00007ffe`ec7f7446 Serilog!Serilog.Capturing.PropertyValueConverter.TryConvertEnumerable(System.Object, Serilog.Parsing.Destructuring, System.Type, Serilog.Events.LogEventPropertyValue ByRef)+0xd1
39 0000008f`caa738d0 00007ffe`efca2836 Serilog!Serilog.Capturing.PropertyValueConverter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring, Int32)+0x156
3a 0000008f`caa73970 00007ffe`efca26f0 Serilog!Serilog.Capturing.PropertyValueConverter+DepthLimiter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring)+0x56
3b 0000008f`caa739c0 00007fff`45bd5218 Serilog!Serilog.Capturing.PropertyValueConverter+<<TryConvertEnumerable>g__MapToDictionaryElements14_0>d.MoveNext()+0x150
3c 0000008f`caa73a10 00007ffe`efca2492 System_Core_ni!System.Linq.Enumerable.ToDictionary[[System.__Canon, mscorlib],[System.__Canon, mscorlib],[System.__Canon, mscorlib]](System.Collections.Generic.IEnumerable`1<System.__Canon>, System.Func`2<System.__Canon,System.__Canon>, System.Func`2<System.__Canon,System.__Canon>, System.Collections.Generic.IEqualityComparer`1<System.__Canon>)+0xffffffff`fffffa58
3d 0000008f`caa73ab0 00007ffe`efc14b49 Serilog!Serilog.Events.DictionaryValue..ctor(System.Collections.Generic.IEnumerable`1<System.Collections.Generic.KeyValuePair`2<Serilog.Events.ScalarValue,Serilog.Events.LogEventPropertyValue>>)+0x102
3e 0000008f`caa73b00 00007ffe`ec7f7446 Serilog!Serilog.Capturing.PropertyValueConverter.TryConvertEnumerable(System.Object, Serilog.Parsing.Destructuring, System.Type, Serilog.Events.LogEventPropertyValue ByRef)+0x89
3f 0000008f`caa73b60 00007ffe`edafa7a0 Serilog!Serilog.Capturing.PropertyValueConverter.CreatePropertyValue(System.Object, Serilog.Parsing.Destructuring, Int32)+0x156
40 0000008f`caa73c00 00007ffe`ec7f8878 Serilog!Serilog.Capturing.MessageTemplateProcessor.CreateProperty(System.String, System.Object, Boolean)+0x50
41 0000008f`caa73c50 00007ffe`ec7f814b Serilog_Exceptions!Serilog.Exceptions.Core.ExceptionEnricher.Enrich(Serilog.Events.LogEvent, Serilog.Core.ILogEventPropertyFactory)+0x58
42 0000008f`caa73ca0 00007ffe`ec7f7ed9 Serilog!Serilog.Core.Enrichers.SafeAggregateEnricher.Enrich(Serilog.Events.LogEvent, Serilog.Core.ILogEventPropertyFactory)+0x5b
43 0000008f`caa73cf0 00007ffe`ed300830 Serilog!Serilog.Core.Logger.Dispatch(Serilog.Events.LogEvent)+0x39
44 0000008f`caa73d30 00007fff`4bdb1f3c Serilog_Extensions_Logging!Serilog.Extensions.Logging.SerilogLogger.Log[[System.__Canon, mscorlib]](Microsoft.Extensions.Logging.LogLevel, Microsoft.Extensions.Logging.EventId, System.__Canon, System.Exception, System.Func`3<System.__Canon,System.Exception,System.String>)+0x550
45 0000008f`caa73e40 00007ffe`ed302416 clr!InstantiatingMethodStubWorker+0xbc
46 0000008f`caa73f00 00007ffe`ef3cb811 Microsoft_Extensions_Logging_Abstractions!Microsoft.Extensions.Logging.LoggerMessage+<>c__DisplayClass6_0`2[[System.__Canon, mscorlib],[System.__Canon, mscorlib]].<Define>b__0(Microsoft.Extensions.Logging.ILogger, System.__Canon, System.__Canon, System.Exception)+0x146
47 0000008f`caa73fb0 00007ffe`eda7fdb1 Microsoft_AspNetCore_Server_Kestrel_Core!Microsoft.AspNetCore.Server.Kestrel.Core.Internal.KestrelTrace.ApplicationError(System.String, System.String, System.Exception)+0x31
48 0000008f`caa73fe0 00007fff`4be0989d Microsoft_AspNetCore_Server_Kestrel_Core!Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol+<ProcessRequests>d__185`1[[Microsoft.AspNetCore.Hosting.Internal.HostingApplication+Context, Microsoft.AspNetCore.Hosting]].MoveNext()+0xce1
49 0000008f`caa74030 00007fff`4be09764 clr!ExceptionTracker::CallHandler+0xfd
4a 0000008f`caa74120 00007fff`4be09678 clr!ExceptionTracker::CallCatchHandler+0x90
4b 0000008f`caa741c0 00007fff`59faa5fd clr!ProcessCLRException+0x31c
4c 0000008f`caa742a0 00007fff`59f406ba ntdll!RtlpExecuteHandlerForUnwind+0xd
4d 0000008f`caa742d0 00007fff`4be0a380 ntdll!RtlUnwindEx+0x38a
4e 0000008f`caa749b0 00007fff`4be0a33b clr!ClrUnwindEx+0x40
4f 0000008f`caa74ed0 00007fff`59faa57d clr!ProcessCLRException+0x2e9
50 0000008f`caa74fb0 00007fff`59f3fd23 ntdll!RtlpExecuteHandlerForException+0xd
51 0000008f`caa74fe0 00007fff`59f41a39 ntdll!RtlDispatchException+0x373
52 0000008f`caa756e0 00007fff`56873c58 ntdll!RtlRaiseException+0x2d9
53 0000008f`caa75ec0 00007fff`4be0a83a KERNELBASE!RaiseException+0x68
54 0000008f`caa75fa0 00007fff`4be0aa9a clr!RaiseTheExceptionInternalOnly+0x2aa
55 0000008f`caa760a0 00007fff`4a3868ef clr!IL_Throw+0x10b
56 0000008f`caa76250 00007fff`499fb6fc mscorlib_ni!System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()+0x1f
57 0000008f`caa76280 00007ffe`eda7f703 mscorlib_ni!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)+0x3c
58 0000008f`caa762b0 00007fff`499b3423 Microsoft_AspNetCore_Server_Kestrel_Core!Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol+<ProcessRequests>d__185`1[[Microsoft.AspNetCore.Hosting.Internal.HostingApplication+Context, Microsoft.AspNetCore.Hosting]].MoveNext()+0x633
59 0000008f`caa764a0 00007fff`499b32b4 mscorlib_ni!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+0x163
5a 0000008f`caa76570 00007fff`499fea8c mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+0x14
5b 0000008f`caa765a0 00007fff`49a05882 mscorlib_ni!System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run()+0x6c
5c 0000008f`caa765f0 00007fff`499816f7 mscorlib_ni!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action, Boolean, System.Threading.Tasks.Task ByRef)+0x62
5d 0000008f`caa76640 00007fff`499fc060 mscorlib_ni!System.Threading.Tasks.Task.FinishContinuations()+0x3d7
5e 0000008f`caa766d0 00007fff`49a08641 mscorlib_ni!System.Threading.Tasks.Task.Finish(Boolean)+0x50
5f 0000008f`caa76730 00007fff`499fd6c3 mscorlib_ni!System.Threading.Tasks.Task`1[[System.__Canon, mscorlib]].TrySetException(System.Object)+0xade1
60 0000008f`caa76780 00007ffe`edaa5f67 mscorlib_ni!System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1[[System.__Canon, mscorlib]].SetException(System.Exception)+0xffffffff`fffff893
61 0000008f`caa767c0 00007fff`4be0989d Microsoft_AspNetCore_Server_IISIntegration!Microsoft.AspNetCore.Server.IISIntegration.IISMiddleware+<Invoke>d__13.MoveNext()+0x717
62 0000008f`caa76840 00007fff`4be09764 clr!ExceptionTracker::CallHandler+0xfd
63 0000008f`caa76930 00007fff`4be09678 clr!ExceptionTracker::CallCatchHandler+0x90
64 0000008f`caa769d0 00007fff`59faa5fd clr!ProcessCLRException+0x31c
65 0000008f`caa76ab0 00007fff`59f406ba ntdll!RtlpExecuteHandlerForUnwind+0xd
66 0000008f`caa76ae0 00007fff`4be0a380 ntdll!RtlUnwindEx+0x38a
67 0000008f`caa771c0 00007fff`4be0a33b clr!ClrUnwindEx+0x40
68 0000008f`caa776e0 00007fff`59faa57d clr!ProcessCLRException+0x2e9
69 0000008f`caa777c0 00007fff`59f3fd23 ntdll!RtlpExecuteHandlerForException+0xd
6a 0000008f`caa777f0 00007fff`59f41a39 ntdll!RtlDispatchException+0x373
6b 0000008f`caa77ef0 00007fff`56873c58 ntdll!RtlRaiseException+0x2d9
6c 0000008f`caa786d0 00007fff`4be0a83a KERNELBASE!RaiseException+0x68
6d 0000008f`caa787b0 00007fff`4be0aa9a clr!RaiseTheExceptionInternalOnly+0x2aa
6e 0000008f`caa788b0 00007fff`4a3868ef clr!IL_Throw+0x10b
6f 0000008f`caa78a60 00007fff`499fb6fc mscorlib_ni!System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()+0x1f
70 0000008f`caa78a90 00007ffe`edaa5eef mscorlib_ni!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)+0x3c
71 0000008f`caa78ac0 00007fff`499b3423 Microsoft_AspNetCore_Server_IISIntegration!Microsoft.AspNetCore.Server.IISIntegration.IISMiddleware+<Invoke>d__13.MoveNext()+0x69f
72 0000008f`caa78bd0 00007fff`499b32b4 mscorlib_ni!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+0x163
73 0000008f`caa78ca0 00007fff`499fea8c mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+0x14
74 0000008f`caa78cd0 00007fff`49a05882 mscorlib_ni!System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run()+0x6c
75 0000008f`caa78d20 00007fff`499816f7 mscorlib_ni!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action, Boolean, System.Threading.Tasks.Task ByRef)+0x62
76 0000008f`caa78d70 00007fff`499fc060 mscorlib_ni!System.Threading.Tasks.Task.FinishContinuations()+0x3d7
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Issue Analytics

State:
Created 5 years ago
Reactions:1
Comments:25 (9 by maintainers)

Top GitHub Comments

7reactions

Homertaxcommented, Jan 30, 2019

I had a very similar situation. My project used Serilog.Exceptions and .Enrich.WithExceptionDetails() as well as EF Core. On certain EF Core db exceptions it would trigger a SELECT of all data in every table included in the context! Obviously the memory usage skyrocketed. Removing .Enrich.WithExceptionDetails() solved the issue, but I never had time to investigate what was happening.

3reactions

joshmouchcommented, Feb 22, 2019

Thanks for the clarification. I added the destructor back in with more restrictive settings, and I started seeing the memory leak again, but this time it’s much slower and I can actually get a memory dump as it’s occurring. The objects are definitely all EntityFramework core-related, though I can’t tell from the dump what the root objects are that’s hanging on to them. I’m going to have to guess Serilog, since it doesn’t occur unless I have the Destructure enabled.

.Destructure.ToMaximumCollectionCount(10) // Default is int.MaxValue
			.Destructure.ToMaximumStringLength(1024) // Default is int.MaxValue
			.Destructure.ToMaximumDepth(5) // Default is 10
			.Enrich.WithExceptionDetails(new DestructuringOptionsBuilder()
				.WithDefaultDestructurers()
				.WithIgnoreStackTraceAndTargetSiteExceptionFilter()
				.WithDestructuringDepth(5) // default is 10
			)