Extra spans when exporting with gPRC protocol

[ralf0131]

Describe the bug

When exporting trace data to Jaeger using gRPC protocol, there is an span generated every 5 seconds.

Steps to reproduce

Using the official demo: https://github.com/alibaba/opentelemetry-go-auto-instrumentation/blob/main/example/demo/README.md

Config the go application to export with gprc protocol:

OTEL_EXPORTER_OTLP_PROTOCOL=grpc OTEL_EXPORTER_OTLP_ENDPOINT="http://127.0.0.1:4317" OTEL_EXPORTER_OTLP_INSECURE=true OTEL_SERVICE_NAME=demo REDIS_ADDR=localhost:6379 REDIS_PASSWORD=xxx MYSQL_DSN="xxx@tcp(127.0.0.1:3306)/test" ./demo

Expected behavior

Traces are exported to Jeager.

Actual behavior

Traces are exported to Jaeger, but with additional spans

opentelemetry-go-auto-instrumentation version

lastest

Environment

Go:
go version go1.22.9 (Red Hat 1.22.9-1.0.1.al8) linux/amd64
OS:
Alibaba Cloud Linux release 3 (OpenAnolis Edition)

Additional context

No response