opentelemetry python threading

otel-threading.py

import threading
import time

from opentelemetry import trace
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import ConsoleSpanExporter
from opentelemetry.sdk.trace.export import SimpleExportSpanProcessor

tracer_provider = TracerProvider()
trace.set_tracer_provider(tracer_provider)

tracer_provider.add_span_processor(
    SimpleExportSpanProcessor(ConsoleSpanExporter())
)

tracer = tracer_provider.get_tracer(__name__)

# This works. Child span actually refers to the parent span as a parent
with tracer.start_as_current_span('parent'):
    with tracer.start_as_current_span('child'):
        time.sleep(1)

time.sleep(2)

print('-----------')

def target():
    with tracer.start_as_current_span('t-child'):
        time.sleep(1)

# This doesn't work. Both spans are independent with no spans 
with tracer.start_as_current_span('t-parent'):
    t = threading.Thread(target=target)
    t.start()
    t.join()

Hello, is there update on the issue?

I have used this solution

# diff from the gist import
from opentelemetry import context

def propagate_otel_context_thread(ctx: Context, fn: Callable):
    with tracer.start_as_current_span('Start thread', ctx):
        fn()

def any_function():
    with tracer.start_as_current_span('t-child'):
        time.sleep(1)


with tracer.start_as_current_span('t-parent'):
    ctx = context.get_current()

    t = threading.Thread(target=propagate_otel_context_thread,
                         args=(ctx, lambda: any_function()))
    t.start()
    t.join()