Question

我正在尝试将Python应用程序从App Engine标准环境移植到App Engine Flexible环境。在the directions in the App Engine documentation之后，我将app.yaml文件更改为使用“python-compat”模式，如下所示：

service: default
runtime: python-compat
api_version: 1
vm: true
threadsafe: true
instance_class: F2

inbound_services:
- warmup

builtins:
- remote_api: on

env_variables:
  GCLOUD_PROJECT: the-name-of-my-project

部署后，任何从应用程序调用数据存储区的尝试（使用NDB api）都会导致以下引用（截断）：

File "/env/local/lib/python2.7/site-packages/google/appengine/datastore/datastore_rpc.py" in check_rpc_success
  1371.       rpc.check_success()
File "/env/local/lib/python2.7/site-packages/google/appengine/api/apiproxy_stub_map.py" in check_success
  579.       self.__rpc.CheckSuccess()
File "/env/local/lib/python2.7/site-packages/google/appengine/ext/vmruntime/vmstub.py" in _WaitImpl
  312.         raise self._ErrorException(*_DEFAULT_EXCEPTION)

Exception Type: RPCFailedError at /volume-list/
Exception Value: The remote RPC to the application server failed for call datastore_v3.RunQuery().

知道问题是什么吗？据我所知，App Engine文档没有给出使用python-compat运行时设置NDB的特殊指令。

Answer 1

我本周刚遇到这个错误，在调试它并使用App Engine支持后，找到了答案。

查看我的SO answer here for more details，或者只需将以下代码添加到appengine_config.py：

try:
    import appengine.ext.vmruntime.vmstub as vmstub
except ImportError:
    pass
else:
    if isinstance(vmstub.DEFAULT_TIMEOUT, (int, long)):
        # Newer requests libraries do not accept integers as header values. 
        # Be sure to convert the header value before sending. 
        # See Support Case ID 11235929.
        vmstub.DEFAULT_TIMEOUT = bytes(vmstub.DEFAULT_TIMEOUT)

将应用程序移植到App Engine Flexible环境后的数据存储RPCFailedError

1 个答案: