Google云端点:将v1迁移到v2，在发现调用中获取错误

Question

我们正在使用下面的google文档将google云端点v1迁移到v2。

https://cloud.google.com/endpoints/docs/frameworks/python/migrating

在部署迁移版本之后，出现以下错误。

"RuntimeError:一个微线程不应该产生一个普通值“

这是完整的回溯。

Traceback (most recent call last):
  File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 267, in Handle
    result = handler(dict(self._environ), self._StartResponse)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 1108, in add_context_wrapper
    return synctaskletfunc(*args, **kwds)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 1087, in synctasklet_wrapper
    return taskletfunc(*args, **kwds).get_result()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 383, in get_result
    self.check_success()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 378, in check_success
    self.wait()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 362, in wait
    if not ev.run1():
  File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/eventloop.py", line 268, in run1
    delay = self.run0()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/eventloop.py", line 230, in run0
    callback(*args, **kwds)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 509, in _help_tasklet_along
    '%.200s yielded %.200r' % (info, value))
RuntimeError: A tasklet should not yield a plain value: initial generator __call__(endpoints_dispatcher.py:128) yielded '{\n  "auth": {\n    "oauth2": {\n      "scopes": {}\n    }\n  },\n  "basePath": "<APINAME>",\n  "baseUrl": "https://<<PROJECTNAME>>.appspot.com/<APINAME>",\n  "batchPath": "batch"

我已经尝试了很少的事情，比如，我知道有些尝试是不符合逻辑的，但是尽管尝试过了。

• 使用gcloud和appcfg.py进行部署
• 删除所有旧版本并部署新版本
• 生成新的发现文档并部署
• 生成openapi服务json并部署新服务。

有任何一个类似的问题请帮帮我。

Answer 1

这是由于ndb库与WSGI规范不兼容造成的。你应该把这件事报告给那个库的支持小组。