Metadata error - Google App Engine

[ffejrekaburb]

Hi,

I have the following sync service which is creating an error on a meta dataservice. Can I ask for help interpreting this? What is the meta dataservice? Is there a link to this logic?

sync.yml

service: sync

instance_class: F2

automatic_scaling:

  max_instances: 1

runtime: python312

app_engine_apis: true

entrypoint: gunicorn -b :$PORT sync:app

#inbound_services:

#- warmup

#libraries:

#- name: jinja2

#  version: latest

#- name: ssl

#  version: latest

# taskqueue and cron tasks can access admin urls

handlers:

- url: /.*

  script: sync.app

  secure: always

  redirect_http_response_code: 301

env_variables:

  MEMCACHE_USE_CROSS_COMPATIBLE_PROTOCOL: "True"

  NDB_USE_CROSS_COMPATIBLE_PICKLE_PROTOCOL: "True"

  DEFERRED_USE_CROSS_COMPATIBLE_PICKLE_PROTOCOL: "True"

  CURRENT_VERSION_TIMESTAMP: "1677721600"

sync.py 

import google.appengine.api

client = ndb.Client()

def ndb_wsgi_middleware(wsgi_app😞

    def middleware(environ, start_response😞

        with client.context():

            return wsgi_app(environ, start_response)

    return middleware

log that appears when service is starting

app.wsgi_app = ndb_wsgi_middleware(google.appengine.api.wrap_wsgi_app(app.wsgi_app))

2024-05-17 04:04:53 sync[20240515t183736] File "/layers/google.python.pip/pip/lib/python3.12/site-packages/google/cloud/ndb/_datastore_query.py", line 373, in _next_batch
2024-05-17 04:04:53 sync[20240515t183736] response = yield _datastore_run_query(query)
2024-05-17 04:04:53 sync[20240515t183736] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-05-17 04:04:53 sync[20240515t183736] File "/layers/google.python.pip/pip/lib/python3.12/site-packages/google/cloud/ndb/tasklets.py", line 319, in _advance_tasklet
2024-05-17 04:04:53 sync[20240515t183736] yielded = self.generator.throw(type(error), error, traceback)
2024-05-17 04:04:53 sync[20240515t183736] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-05-17 04:04:53 sync[20240515t183736] File "/layers/google.python.pip/pip/lib/python3.12/site-packages/google/cloud/ndb/_datastore_query.py", line 1030, in _datastore_run_query
2024-05-17 04:04:53 sync[20240515t183736] response = yield _datastore_api.make_call(

2024-05-17 04:04:45 sync[20240515t183736] google.api_core.exceptions.RetryError: Maximum number of 3 retries exceeded while calling <function make_call.<locals>.rpc_call at 0x3e956b7625c0>, last exception: 503 Getting metadata from plugin failed with error: Failed to retrieve http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/?recursive=true from the Google Compute Engine metadata service. Compute Engine Metadata server unavailable