dotnet-gcdump error : Process 1 not running compatible .NET runtime

I have a .Net 7 API thats runs as a background service and it is running on tanzu kubernetes environment. I have installed dotnet-gcdump but when I try to execute a dump (after exec into pod) using :

./dotnet-gcdump collect -p 1 -o sample1

I am getting an error :

 0.0s: Creating type table flushing task
0.0s: [Error] Exception during gcdump: Microsoft.Diagnostics.NETCore.Client.ServerNotAvailableException: Process 1 not running compatible .NET runtime.
at Microsoft.Diagnostics.NETCore.Client.PidIpcEndpoint.GetDefaultAddress() in /_/src/Microsoft.Diagnostics.NETCore.Client/DiagnosticsIpc/IpcTransport.cs:line 282
at Microsoft.Diagnostics.NETCore.Client.PidIpcEndpoint.Connect(TimeSpan timeout) in /_/src/Microsoft.Diagnostics.NETCore.Client/DiagnosticsIpc/IpcTransport.cs:line 243
at Microsoft.Diagnostics.NETCore.Client.IpcClient.SendMessageGetContinuation(IpcEndpoint endpoint, IpcMessage message) in /_/src/Microsoft.Diagnostics.NETCore.Client/DiagnosticsIpc/IpcClient.cs:line 40
at Microsoft.Diagnostics.NETCore.Client.EventPipeSession.Start(IpcEndpoint endpoint, IEnumerable`1 providers, Boolean requestRundown, Int32 circularBufferMB) in /_/src/Microsoft.Diagnostics.NETCore.Client/DiagnosticsClient/EventPipeSession.cs:line 34
at Microsoft.Diagnostics.NETCore.Client.DiagnosticsClient.StartEventPipeSession(IEnumerable`1 providers, Boolean requestRundown, Int32 circularBufferMB) in /_/src/Microsoft.Diagnostics.NETCore.Client/DiagnosticsClient/DiagnosticsClient.cs:line 70
at Microsoft.Diagnostics.Tools.GCDump.EventPipeSessionController..ctor(Int32 pid, List`1 providers, Boolean requestRundown) in /_/src/Tools/dotnet-gcdump/DotNetHeapDump/EventPipeDotNetHeapDumper.cs:line 235
at Microsoft.Diagnostics.Tools.GCDump.EventPipeDotNetHeapDumper.DumpFromEventPipe(CancellationToken ct, Int32 processID, MemoryGraph memoryGraph, TextWriter log, Int32 timeout, DotNetHeapInfo dotNetInfo) in /_/src/Tools/dotnet-gcdump/DotNetHeapDump/EventPipeDotNetHeapDumper.cs:line 52

The Dockerfile for the API is generated dynamically in Gitlab CI using the following script :

.generate_dockerfile:
script: |
echo "checking dockerfile existence"
if ! [ -e Dockerfile ]; then 
echo "dockerfile doesn't exist. Trying to create a new dockerfile from csproj."
pwd
cd ./src
echo "$PWD"
docker_entrypoint=$(grep -m 1 AssemblyName $PWD/*.csproj | sed -r 's/\s*<[^>]*>//g' | sed -r 's/\r$//g').dll
echo "${docker_entrypoint}"
cat > Dockerfile << EOF
FROM mcr.microsoft.com/dotnet/aspnet:7.0 AS base
RUN apt-get update && apt-get install -y wget
RUN wget -O sdk_install.sh https://dot.net/v1/dotnet-install.sh
RUN chmod 777 sdk_install.sh
RUN ./sdk_install.sh -c 7.0
RUN cd /root/.dotnet
RUN /root/.dotnet/dotnet tool install --global dotnet-gcdump
RUN echo $PATH
RUN export ENV PATH="$PATH:/root/.dotnet/tools"
RUN echo $PATH
WORKDIR /app
COPY ./publish .
ENTRYPOINT dotnet $docker_entrypoint
EOF
echo "dockerfile created"
else
echo "dockerfile exists"
fi

When I run ./dotnet-gcdump --version I get :

7.0.410101+f9938321xxxxxxxxxxxxxxxxxxxxxxxxxxxx

And when I run ./dotnet --info I get :

.NET SDK:
Version:   7.0.202
Commit:    6c74320bc3
Runtime Environment:
OS Name:     debian
OS Version:  11
OS Platform: Linux
RID:         debian.11-x64
Base Path:   /root/.dotnet/sdk/7.0.202/
Host:
Version:      7.0.4
Architecture: x64
Commit:       0a396acafe
.NET SDKs installed:
7.0.202 [/root/.dotnet/sdk]
.NET runtimes installed:
Microsoft.AspNetCore.App 7.0.4 [/root/.dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 7.0.4 [/root/.dotnet/shared/Microsoft.NETCore.App]
Other architectures found:
None
Environment variables:
Not set
global.json file:
Not found

What am I missing ?

The issue was with the process ID - i was passing in a wrong process ID.

You have to check the process ID of the dotnet DLL (main process) before running the dump with :

cd /root/.dotnet/tools
./dotnet-gcdump ps

./dotnet-gcdump ps lists all the processes running in the container , with their corresponding ID like in the example output below:

./dotnet-gcdump ps
6  dotnet  /usr/share/dotnet/dotnet  dotnet MyAPP.Core.MyAPI.dll