Not Able to send Traces to Elastic APM Server via http trace exporter

[abhi2510]

I have used Opentelemetry to send the traces to the Elastic APM Server in Flask Framework. But I am not able to see any traces in Elastic Server and not getting error responses in the logs also.
Can you please let me know the issue?

Python Script:

import logging
from flask import Flask

app = Flask(__name__)

from opentelemetry.instrumentation.flask import FlaskInstrumentor
FlaskInstrumentor().instrument_app(app)

from opentelemetry import trace
from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
from opentelemetry.sdk.resources import SERVICE_NAME, Resource
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor, ConsoleSpanExporter

resource = Resource(attributes={
    SERVICE_NAME: "Window-service"
})

provider = TracerProvider(resource=resource)
processor = BatchSpanProcessor(OTLPSpanExporter(
    endpoint="Elastic APM Server URL",
    headers={'authorization':'Bearer Secret token'}))
provider.add_span_processor(processor)
trace.set_tracer_provider(provider)

@app.route('/env', methods=['GET'])
def doNothing():
    print("env")
    logging.info("tets for env donothing")
    return "env setup"

if __name__=="__main__":
    app.run(host='0.0.0.0',port='9080',debug=True, threaded=True)

Requirements file:

opentelemetry-api==1.18.0
opentelemetry-sdk==1.18.0
opentelemetry-exporter-otlp==1.18.0
opentelemetry-instrumentation-flask==0.39b0
Flask==2.3.2

[srikanthccv]

It doesn't work in the debug hot reloading mode. Please see open-telemetry/opentelemetry-python-contrib#546, and it is documented in #1795