Support Advisory: Applications using NewtonSoft.Json may crash in 4.3

This document describes the support advisory for an AppDynamics product.

Summary

Applications using the NewtonSoft.Json library could potentially crash.

Affected Software

The issue affects 4.3.0.x versions of the AppDynamics .NET Agent.

Impact

In some cases, an instrumented application can crash with one of the following exception details:

  • Exception: System.IO.FileLoadExceptionMessage: Loading this assembly would produce a different grant set from other instances. (Exception from HRESULT: 0x80131401)

  • Exception: System.IO.FileLoadExceptionMessage: Could not load file or assembly 'Newtonsoft.Json, Version=8.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The system cannot find the file specified.

  • Exception: System.InvalidProgramExceptionMessage: Common Language Runtime detected an invalid program.

Applications not using NewtonSoft.Json.dll are not affected.

Resolution

Customers running 4.3.0.x (4.3.0.1, 4.3.0.2, 4.3.0.3, or 4.3.0.4) versions of the .NET Agent should either:

  • Upgrade to the 4.3.1 or later version of the .NET agent.

  • Uninstall 4.3.0.x and install version 4.2.15 of the .NET agent.