SkyAPM.Diagnostics.CAP System.MissingMethodException: Method not found sometimes

[bingtianyiyan]

Please answer these questions before submitting your issue.

• Why do you submit this issue?
• Question or discussion
• Bug
• Requirement
• Feature or performance improvement

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Question

• What do you want to know?

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Bug

• Which version of SkyWalking, OS and .NET Runtime?
  -SkyWalking 8.9.1-91ab0a3 (20211210154203)
  SkyAPM.Agent.AspNetCore：2.1.0
  SkyAPM.Diagnostics.CAP：2.1.0

• Which company or project?

• What happen?
  when i use SkyAPM.Diagnostics.CAP(2.1.0) to monitor cap，The application is open and run， my computer is Lock screen,the newwork mybe break sometimes，When I come back, unlock my computer and connect to the internet，application is to print this error and Will not automatically recover，but cap can normal use to publish message and receivemessage
  Invoke diagnostic method exception.
  System.MissingMethodException: Method not found: 'DotNetCore.CAP.Messages.TransportMessage DotNetCore.CAP.Diagnostics.CapEventDataPubSend.get_TransportMessage()'.
  at SkyApm.Diagnostics.CAP.CapTracingDiagnosticProcessor.BeforePublish(CapEventDataPubSend eventData)
  at invoker_Void BeforePublish(CapEventDataPubSend)(Object , Object[] )
  at SkyApm.Diagnostics.TracingDiagnosticMethod.Invoke(String diagnosticName, Object value)
  at SkyApm.Diagnostics.TracingDiagnosticObserver.OnNext(KeyValuePair`2 value)

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Requirement or improvement

• Please describe about your requirements or improvement suggestions.

[feiyun0112]

It may be that the new version of DotNetCore.CAP modifies the TransportMessage definition, try the version referenced by SkyAPM.Diagnostics.CAP

 <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
        <PackageReference Include="DotNetCore.CAP" Version="3.1.2" PrivateAssets="All" />
    </ItemGroup>

    <ItemGroup Condition="'$(TargetFramework)' == 'net5.0'">
        <PackageReference Include="DotNetCore.CAP" Version="5.2.0" />
    </ItemGroup>

    <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
        <PackageReference Include="DotNetCore.CAP" Version="6.2.1" />
    </ItemGroup>

    <ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">
        <PackageReference Include="DotNetCore.CAP" Version="7.0.1" />
    </ItemGroup>

[bingtianyiyan]

It may be that the new version of DotNetCore.CAP modifies the TransportMessage definition, try the version referenced by SkyAPM.Diagnostics.CAP

 <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
        <PackageReference Include="DotNetCore.CAP" Version="3.1.2" PrivateAssets="All" />
    </ItemGroup>

    <ItemGroup Condition="'$(TargetFramework)' == 'net5.0'">
        <PackageReference Include="DotNetCore.CAP" Version="5.2.0" />
    </ItemGroup>

    <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
        <PackageReference Include="DotNetCore.CAP" Version="6.2.1" />
    </ItemGroup>

    <ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">
        <PackageReference Include="DotNetCore.CAP" Version="7.0.1" />
    </ItemGroup>

thanks for you,i try it.my CAP version is 7.1.4