When I use grpc for datastore_api to get entities in GAE flex, there is no response.

Yesterday, I update my project’s environment from vm: true to env: flex and datastore api version from 0.22.* to 1.0.0. In local test, there is no problem and I can fetch entities with datastore_api=make_datastore_api(self)(google-cloud-python/datastore/google/cloud/datastore/client.py) However, in GAE flex, when I use grpc for datastore_api to get entities in GAE flex, there is no response. I can get entities in GAE flex when I use HTTPDatastoreAPI as datastore_api. How can I use grpc for datastore_api in GAE flex?

1. OS type and version Local: Ubuntu 16.04 Cloud: Google App Engine Flexible Environment
2. Python version and virtual environment information python --version Python 3.5.3
3. google-cloud-python version pip show google-cloud, pip show google-<service> or pip freeze

cachetools==2.0.0
certifi==2017.4.17
chardet==3.0.3
click==6.7
colorama==0.3.9
defusedxml==0.5.0
dill==0.2.6
Django==1.10
django-allauth==0.27.0
django-bmemcached==0.2.3
django-bootstrap3==7.1.0
django-password-validation==0.1.1
django-recaptcha==1.3.0
docopt==0.6.2
enum34==1.1.6
feedparser==5.2.1
future==0.16.0
gapic-google-cloud-datastore-v1==0.15.3
gapic-google-cloud-error-reporting-v1beta1==0.15.3
gapic-google-cloud-logging-v2==0.91.3
gapic-google-cloud-pubsub-v1==0.15.4
gapic-google-cloud-spanner-admin-database-v1==0.15.3
gapic-google-cloud-spanner-admin-instance-v1==0.15.3
gapic-google-cloud-spanner-v1==0.15.3
gapic-google-cloud-speech-v1beta1==0.15.3
gapic-google-cloud-vision-v1==0.90.3
geoip2==2.5.0
gevent==1.2.2
gitsome==0.7.2
google-auth==1.0.1
google-auth-httplib2==0.0.2
google-cloud==0.25.0
google-cloud-bigquery==0.24.0
google-cloud-bigtable==0.24.0
google-cloud-core==0.24.1
google-cloud-datastore==1.0.0
google-cloud-dns==0.24.0
google-cloud-error-reporting==0.24.2
google-cloud-happybase==0.24.0
google-cloud-language==0.24.1
google-cloud-logging==1.0.0
google-cloud-monitoring==0.24.0
google-cloud-pubsub==0.25.0
google-cloud-resource-manager==0.24.0
google-cloud-runtimeconfig==0.24.0
google-cloud-spanner==0.24.2
google-cloud-speech==0.24.0
google-cloud-storage==1.1.1
google-cloud-translate==0.24.0
google-cloud-vision==0.24.0
google-gax==0.15.13
google-resumable-media==0.0.2
googleapis-common-protos==1.5.2
greenlet==0.4.12
grpc-google-cloud-datastore-v1==0.14.0
grpc-google-iam-v1==0.11.1
grpcio==1.3.5
gunicorn==19.7.1
html5lib==1.0b8
httplib2==0.10.3
idna==2.5
iso8601==0.1.11
Markdown==2.6.6
maxminddb==1.3.0
mysqlclient==1.3.7
numpy==1.13.0
numpydoc==0.6.0
oauth2client==3.0.0
oauthlib==2.0.2
ply==3.8
prompt-toolkit==1.0.14
proto-google-cloud-datastore-v1==0.90.4
proto-google-cloud-error-reporting-v1beta1==0.15.3
proto-google-cloud-logging-v2==0.91.3
proto-google-cloud-pubsub-v1==0.15.4
proto-google-cloud-spanner-admin-database-v1==0.15.3
proto-google-cloud-spanner-admin-instance-v1==0.15.3
proto-google-cloud-spanner-v1==0.15.3
proto-google-cloud-speech-v1beta1==0.15.3
proto-google-cloud-vision-v1==0.90.3
protobuf==3.3.0
pyasn1==0.2.3
pyasn1-modules==0.0.9
pycrypto==2.6.1
Pygments==2.2.0
pylibmc==1.5.2
python-binary-memcached==0.26.0
python3-openid==3.1.0
pytz==2017.2
requests==2.17.3
requests-oauthlib==0.8.0
rsa==3.4.2
six==1.10.0
tweepy==3.5.0
ua-parser==0.7.3
uritemplate==3.0.0
uritemplate.py==3.0.2
urllib3==1.21.1
user-agents==1.1.0
wcwidth==0.1.7

1. Stacktrace if available No error occur.
2. Steps to reproduce I don’t know whether this is reproducable.
3. Code example

from google.cloud import datastore
c = datastore.Client()
c.get(c.key('kind', 'name')) # freeze here in GAE flex.

[sengoontoh]

Has anyone tried this solution? It worked for me

https://github.com/grpc/grpc/issues/4629

from gevent import monkey monkey.patch_all()

import grpc.experimental.gevent as grpc_gevent grpc_gevent.init_gevent()

[zero-master]

@dhermes Here you go https://github.com/zero-master/grcp-issue

On, step 4 you’ll see that it blocks forever but if you use sync worker class by commenting the last line, it will work as expected.

http://docs.gunicorn.org/en/stable/design.html