Description
Environment
SaaS (https://sentry.io/)
Version
No response
Steps to Reproduce
Using the python SDK. version 1.5.4.
if you run multiple subtasks concurrently (with async await) within each of these subtasks there are a few nested spans.
async def _batch_task(task: Coroutine, pool: asyncio.Semaphore, span: Span, index: int):
async with pool:
# Sleep 0 means if we have been canceled we exit before calling the task
# await asyncio.sleep(0)
with span.start_child(op="batch", description=f'task-{index}'):
await task
async def batch(items: List[Coroutine], size=10):
with start_span(op="utils", description='batch') as span:
span.set_data('size', size)
span.set_data('number_of_coroutines', len(items))
if len(items) == 0:
return
loop = asyncio.get_event_loop()
pool = asyncio.Semaphore(value=size)
tasks = [
loop.create_task(
_batch_task(coroutine_item, pool, span, index)
) for index, coroutine_item in enumerate(items)
]
try:
await asyncio.wait(
tasks,
return_when=asyncio.FIRST_EXCEPTION
)
finally:
# loop over unfinished tasks canceling them.
for task in tasks:
task.cancel()
try:
# To raise any exception it might have thrown
await task
except asyncio.CancelledError:
pass
Expected Result
For each nested subtask to see the full tree of spans on sentry.io
Actual Result
See the attache screenshot here the 3 items labeled batch should have identical trees within them. Other code running on the server has validated that those nested code did in fact run so the issue is either in the python sdk not recording them or the sentry UI not display them.
when I inspect the json that I can download from the page, (not sharing here as it contained sensitive data) I see that the spans that should have children in the graph do not have any child entries in the json.
