Hi. This is a new error I got. Anyone know why it ...
# prefect-community
j
Hi. This is a new error I got. Anyone know why it just started appearing? Fails like this once out every 100 tasks. Anyone know why it just started appearing?
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Flow could not be retrieved from deployment.
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/dist-packages/prefect/engine.py", line 247, in retrieve_flow_then_begin_flow_run
    flow = await load_flow_from_flow_run(flow_run, client=client)
  File "/usr/local/lib/python3.9/dist-packages/prefect/client.py", line 104, in with_injected_client
    return await fn(*args, **kwargs)
  File "/usr/local/lib/python3.9/dist-packages/prefect/deployments.py", line 47, in load_flow_from_flow_run
    await storage_block.get_directory(from_path=None, local_path=".")
  File "/usr/local/lib/python3.9/dist-packages/prefect/filesystems.py", line 98, in get_directory
    shutil.copytree(from_path, local_path, dirs_exist_ok=True)
  File "/usr/lib/python3.9/shutil.py", line 568, in copytree
    return _copytree(entries=entries, src=src, dst=dst, symlinks=symlinks,
  File "/usr/lib/python3.9/shutil.py", line 522, in _copytree
    raise Error(errors)
shutil.Error: [('/home/app/app/.prefect/orion.db-shm', './.prefect/orion.db-shm', "[Errno 2] No such file or directory: '/home/app/app/.prefect/orion.db-shm'")]
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m
Hey @js10 Do you have an example for the flow/tasks that are being run so we can try and reproduce this?
b
Also, QQs, ā€¢ What version of Prefect are you running? ā€¢ Around when did this start happening?
j
Removed some stuff so this is really pseudocode, but it's just two simple flows in one file that execute at 15 and 30 min intervals.
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import sys
sys.path.append("/home/app/app")


import pytz
import uuid
from datetime import datetime

from prefect import flow, task, get_run_logger

@task(name='trend:store')
def store_data(data, kw, timeframe, geo):
  logger = get_run_logger()
  <http://logger.info|logger.info>(f"saved some stuff to db from the internet")

@flow(name="store7day")
def store_7_day():
  store_data(data, coninuous_7_day, timeframe='123', geo='US')

@flow(name="store4h")
def store_4_hour():
  store_data(data, coninuous_7_day, timeframe='123', geo='US')




if __name__ == "__main__":
  store_meta()
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prefect = "^2.0.2"
this started happening when I upgraded to 2.0.2
could it be an issue with the same container executing the two flows?
a
looks like you got to a point where you hit the limits of SQLite https://www.sqlite.org/wal.html and it may be time to consider upgrading either to Cloud 2.0 or to Postgres -- the reason is that it's essentially a single file not meant for concurrent writes you can sign up for Cloud 2.0 using https://app.prefect.cloud/
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