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1. By default, SigNoz listens on ports

4317

and

4318

for incoming telemetry data, instead, it seems that you are exporting data to port

3301

which is used for frontend. Refer here for instrumenting your spring boot application. You can also see the sample app. 2. It is to be noticed from the message that there are some internal errors within your Java application. To resolve this, please ensure that you launch the app correctly and address any potential issues.

4317/4318 is also not working

Are you on a Windows machine? If so, I suggest trying the same on a Linux machine or even WSL, because as of now SigNoz is not fully supported on Windows.

yes