问题
I deployed my application in App engine successfully. However, when I try to access my API, I receive the following message:
Error: Server Error The server encountered an error and could not complete your request. Please try again in 30 seconds.
I'm unable to understand the cause of this issue, as it is coming from Datastore API. Can somebody please help me to troubleshoot this issue?
Below is all the relevant information.
Backtraces
When referred to root of the URL
2018-03-27 08:08:45,090 <root> [ERROR]
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Traceback (most recent call last):
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File "/base/alloc/tmpfs/dynamic_runtimes/python27/6baee03590d046f1_unzipped/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 240, in Handle
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handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
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File "/base/alloc/tmpfs/dynamic_runtimes/python27/6baee03590d046f1_unzipped/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 299, in _LoadHandler
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handler, path, err = LoadObject(self._handler)
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File "/base/alloc/tmpfs/dynamic_runtimes/python27/6baee03590d046f1_unzipped/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 96, in LoadObject
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__import__(cumulative_path)
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/web/app.py", line 6, in <module>
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from web.routes import ROUTES_BLUEPRINT
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/web/routes.py", line 7, in <module>
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from metadata.repository.gcp_clouddatastore import GCPCloudDataStore
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/metadata/repository/gcp_clouddatastore.py", line 8, in <module>
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from google.cloud import datastore
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/cloud/datastore/__init__.py", line 60, in <module>
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from google.cloud.datastore.batch import Batch
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/cloud/datastore/batch.py", line 24, in <module>
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from google.cloud.datastore import helpers
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/cloud/datastore/helpers.py", line 29, in <module>
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from google.cloud.datastore_v1.proto import datastore_pb2
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/cloud/datastore_v1/__init__.py", line 18, in <module>
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from google.cloud.datastore_v1.gapic import datastore_client
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/cloud/datastore_v1/gapic/datastore_client.py", line 18, in <module>
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import google.api_core.gapic_v1.client_info
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/api_core/gapic_v1/__init__.py", line 16, in <module>
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from google.api_core.gapic_v1 import config
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/api_core/gapic_v1/config.py", line 23, in <module>
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import grpc
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/grpc/__init__.py", line 22, in <module>
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from grpc._cython import cygrpc as _cygrpc
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ImportError: dynamic module does not define init function (initcygrpc)
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This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application.
Accessing API other then root, shows me another backtrace
2018-03-27 16:13:41.378 HKT
2018-03-27 08:13:41,377 <root> [ERROR]
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Traceback (most recent call last):
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File "/base/alloc/tmpfs/dynamic_runtimes/python27/6baee03590d046f1_unzipped/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 240, in Handle
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handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
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File "/base/alloc/tmpfs/dynamic_runtimes/python27/6baee03590d046f1_unzipped/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 299, in _LoadHandler
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handler, path, err = LoadObject(self._handler)
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File "/base/alloc/tmpfs/dynamic_runtimes/python27/6baee03590d046f1_unzipped/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 96, in LoadObject
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__import__(cumulative_path)
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/web/app.py", line 6, in <module>
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from web.routes import ROUTES_BLUEPRINT
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/web/routes.py", line 7, in <module>
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from metadata.repository.gcp_clouddatastore import GCPCloudDataStore
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/metadata/repository/gcp_clouddatastore.py", line 8, in <module>
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from google.cloud import datastore
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/cloud/datastore/__init__.py", line 60, in <module>
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from google.cloud.datastore.batch import Batch
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/cloud/datastore/batch.py", line 24, in <module>
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from google.cloud.datastore import helpers
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/cloud/datastore/helpers.py", line 29, in <module>
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from google.cloud.datastore_v1.proto import datastore_pb2
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File "/base/data/home/apps/s~singapore-profile-dev2/20180327t160251.408595751204823647/lib/google/cloud/datastore_v1/__init__.py", line 17, in <module>
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from google.cloud.datastore_v1 import types
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ImportError: cannot import name types
app.yaml file contents
runtime: python27
api_version: 1
threadsafe: true
handlers:
- url: /.*
script: web.app.app
libraries:
- name: lxml
version: latest
appengine_config.py file contents
# appengine_config.py
from google.appengine.ext import vendor
# Add any libraries install in the "lib" folder.
vendor.add('lib')
回答1:
You are using the datastore client library, but this does not work in the standard environment. From the docs:
You cannot use the Cloud Datastore client library with Python applications in the App Engine standard environment.
You need to use the ndb package, as recommended in the docs (I believe there is also a REST API, but I've never used it).
回答2:
The first traceback appears to suggest that grpc is somehow involved, and that's a problem. According to comments on issue 149 grpc is not yet supported on GAE standard environment.
But since you're on the GAE standard environment you should really use the recommended, GAE-optimized (and more feature-rich) NDB Client Library to access the datastore, not the generic google.cloud.datastore one (which might indeed include features not meeting the standard env sandbox restrictions).
来源：https://stackoverflow.com/questions/49527475/grpc-and-types-import-error-in-app-engine-datastore