I am using the python pubsublite client(async version) for subscribing from pubsub-lite. I get the below error intermittently
Traceback (most recent call last):
File \"/usr/local/lib/python3.10/site-packages/grpc/_plugin_wrapping.py\", line 89, in __call__
self._metadata_plugin(
File \"/usr/local/lib/python3.10/site-packages/google/auth/transport/grpc.py\", line 101, in __call__
callback(self._get_authorization_headers(context), None)
File \"/usr/local/lib/python3.10/site-packages/google/auth/transport/grpc.py\", line 87, in _get_authorization_headers
self._credentials.before_request(
File \"/usr/local/lib/python3.10/site-packages/google/auth/credentials.py\", line 134, in before_request
self.apply(headers)
File \"/usr/local/lib/python3.10/site-packages/google/auth/credentials.py\", line 110, in apply
_helpers.from_bytes(token or self.token)
File \"/usr/local/lib/python3.10/site-packages/google/auth/_helpers.py\", line 130, in from_bytes
raise ValueError(\"{0!r} could not be converted to unicode\".format(value))
ValueError: None could not be converted to unicode"
I don't use GOOGLE_APPLICATION_CREDENTIALS env variable to specify credentials, instead I do as below(I don't want to write credentials to a file in aws host)
import asyncio
from google.cloud.pubsublite.cloudpubsub import AsyncSubscriberClient
from google.cloud.pubsublite.types import (
CloudRegion,
CloudZone,
FlowControlSettings,
SubscriptionPath,
)
from google.oauth2 import service_account
class AsyncTimedIterable:
def __init__(self, iterable, poll_timeout=90):
class AsyncTimedIterator:
def __init__(self):
self._iterator = iterable.__aiter__()
async def __anext__(self):
try:
result = await asyncio.wait_for(
self._iterator.__anext__(), int(poll_timeout)
)
if not result:
raise StopAsyncIteration
return result
except asyncio.TimeoutError as e:
raise e
self._factory = AsyncTimedIterator
def __aiter__(self):
return self._factory()
# TODO add project info below
location = CloudZone(CloudRegion("region"), "zone")
subscription_path = SubscriptionPath("project_number", location, "subscription_id")
# TODO add service account details
gcp_creds = {}
async def async_receive_from_subscription(per_partition_count=100):
# Configure when to pause the message stream for more incoming messages based on the
# maximum size or number of messages that a single-partition subscriber has received,
# whichever condition is met first.
per_partition_flow_control_settings = FlowControlSettings(
# 1,000 outstanding messages. Must be >0.
messages_outstanding=per_partition_count,
# 10 MiB. Must be greater than the allowed size of the largest message (1 MiB).
bytes_outstanding=10 * 1024 * 1024,
)
async with AsyncSubscriberClient(
credentials=service_account.Credentials.from_service_account_info(gcp_creds)
) as async_subscriber_client:
message_iterator = await async_subscriber_client.subscribe(
subscription_path,
per_partition_flow_control_settings=per_partition_flow_control_settings,
)
timed_iter = AsyncTimedIterable(message_iterator, 90)
async for message in timed_iter:
yield message
async def main():
async for message in async_receive_from_subscription(per_partition_count=100_000):
print(message.data)
if __name__ == "__main__":
asyncio.run(main())
when I went through the files in stack trace I saw a code comment as below in file ``
# The plugin may be invoked on a thread created by Core, which will not
# have the context propagated. This context is stored and installed in
# the thread invoking the plugin.
Is it because the credentials I set are not being sent to another thread when it is created?
