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Exceptions History - Get

Captures a history of first chance exceptions that were thrown in the specified process.

Note

This feature is not enabled by default and requires configuration to be enabled. The in-process features must be enabled since the exceptions history feature uses shared libraries loaded into the target application for collecting the exception information.

HTTP Route

GET /exceptions?pid={pid}&uid={uid}&name={name}&egressProvider={egressProvider}&tags={tags} HTTP/1.1

Note

Process information (IDs, names, environment, etc) may change between invocations of these APIs. Processes may start or stop between API invocations, causing this information to change.

Host Address

The default host address for these routes is https://localhost:52323. This route is only available on the addresses configured via the --urls command line parameter and the DOTNETMONITOR_URLS environment variable.

URI Parameters

Name In Required Type Description
pid query false int The ID of the process.
uid query false guid A value that uniquely identifies a runtime instance within a process.
name query false string The name of the process.
egressProvider query false string If specified, uses the named egress provider for egressing the collected exceptions. When not specified, the exceptions are written to the HTTP response stream. See Egress Providers for more details.
tags query false string (7.1+) A comma-separated list of user-readable identifiers for the operation.

See ProcessIdentifier for more details about the pid, uid, and name parameters.

If none of pid, uid, or name are specified, exceptions from the default process will be captured. Attempting to capture exceptions from the default process when the default process cannot be resolved will fail.

Authentication

Authentication is enforced for this route. See Authentication for further information.

Allowed schemes:

  • Bearer
  • Negotiate (Windows only, running as unelevated)

Responses

Name Type Description Content Type
200 OK ExceptionInstance[] Newline-delimited JSON representation of first chance exceptions from the target process. application/x-ndjson
200 OK ExceptionInstance[] Separator-delimited JSON representation of first chance exceptions from the target process. application/json-seq
200 OK text Text representation of first chance exceptions from the target process. text/plain
202 Accepted When an egress provider is specified.
400 Bad Request ValidationProblemDetails An error occurred due to invalid input. The response body describes the specific problem(s). application/problem+json
401 Unauthorized Authentication is required to complete the request. See Authentication for further information.

Examples

Sample Request

Collect exceptions from a specific process in plain text format:

GET /exceptions?pid=21632 HTTP/1.1
Host: localhost:52323
Authorization: Bearer fffffffffffffffffffffffffffffffffffffffffff=
Accept: text/plain

or

GET /exceptions?uid=cd4da319-fa9e-4987-ac4e-e57b2aac248b HTTP/1.1
Host: localhost:52323
Authorization: Bearer fffffffffffffffffffffffffffffffffffffffffff=
Accept: text/plain

Sample Response

HTTP/1.1 200 OK
Content-Type: text/plain

First chance exception at 2023-07-13T21:45:11.8056355Z
System.InvalidOperationException: Operation is not valid due to the current state of the object.
   at WebApplication3.Pages.IndexModel+<GetData>d__3.MoveNext()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext,System.Threading.ContextCallback,System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1+TResult,System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1+TStateMachine].MoveNext(System.Threading.Thread)
   at System.Runtime.CompilerServices.YieldAwaitable+YieldAwaiter+<>c.<OutputCorrelationEtwEvent>b__6_0(System.Action,System.Threading.Tasks.Task)
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool+WorkerThread.WorkerThreadStart()

First chance exception at 2023-07-13T21:46:18.7530773Z
System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.Net.Sockets.NetworkStream'.
   at System.Net.Sockets.NetworkStream.ReadAsync(System.Memory`1[[System.Byte, System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]][System.Byte],System.Threading.CancellationToken)
   at System.Net.Http.HttpConnection+<<EnsureReadAheadTaskHasStarted>g__ReadAheadWithZeroByteReadAsync|43_0>d.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1+TResult,System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1+TStateMachine].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext,System.Threading.ContextCallback,System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1+TResult,System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1+TStateMachine].MoveNext(System.Threading.Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1+TResult,System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1+TStateMachine].MoveNext()
   at System.Net.Sockets.SocketAsyncEventArgs+<>c.<.cctor>b__176_0(System.UInt32,System.UInt32,System.Threading.NativeOverlapped*)
   at System.Threading.PortableThreadPool+IOCompletionPoller+Callback.Invoke(System.Threading.PortableThreadPool+IOCompletionPoller+Event)
   at System.Threading.ThreadPoolTypedWorkItemQueue`2[System.Threading.ThreadPoolTypedWorkItemQueue`2+T,System.Threading.ThreadPoolTypedWorkItemQueue`2+TCallback].System.Threading.IThreadPoolWorkItem.Execute()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool+WorkerThread.WorkerThreadStart()

Sample Request

Collect exceptions from the default process in newline-delimited JSON format:

GET /exceptions HTTP/1.1
Host: localhost:52323
Authorization: Bearer fffffffffffffffffffffffffffffffffffffffffff=
Accept: application/x-ndjson

Sample Response

HTTP/1.1 200 OK
Content-Type: application/x-ndjson

{
  "id": 2,
  "timestamp": "2023-07-13T21:45:11.8056355Z",
  "typeName": "System.InvalidOperationException",
  "moduleName": "System.Private.CoreLib.dll",
  "message": "Operation is not valid due to the current state of the object.",
  "innerExceptions": [],
  "stack": {
    "threadId": 4768,
    "threadName": null,
    "frames": [
      {
        "methodName": "MoveNext",
        "methodToken": 100663639,
        "parameterTypes": [],
        "typeName": "WebApplication3.Pages.IndexModel\u002B\u003CGetData\u003Ed__3",
        "moduleName": "WebApplication3.dll",
        "moduleVersionId": "bf769014-c2e2-496a-93b7-76fbbcd04be5",
        "hidden": false
      },
      ... // see stacks.md
    ]
  }
}
{
  "id": 3,
  "timestamp": "2023-07-13T21:46:18.7530773Z",
  "typeName": "System.ObjectDisposedException",
  "moduleName": "System.Private.CoreLib.dll",
  "message": "Cannot access a disposed object.\r\nObject name: \u0027System.Net.Sockets.NetworkStream\u0027.",
  "innerExceptions": [],
  "stack": {
    "threadId": 15912,
    "threadName": null,
    "frames": [
      {
        "methodName": "ThrowObjectDisposedException",
        "methodToken": 100663639,
        "parameterTypes": [
          "System.Object"
        ],
        "typeName": "System.ThrowHelper",
        "moduleName": "System.Private.CoreLib.dll",
        "moduleVersionId": "bf769014-c2e2-496a-93b7-76fbbcd04be5",
        "hidden": true
      },
      ... // see stacks.md
    ]
  }
}

Supported Runtimes

Operating System Runtime Version
Windows .NET 6+
Linux .NET 6+
MacOS .NET 6+