Hi,

We are facing issue with production application. It's some datastore 
internal error. Looks like data reads and writes are randomly failing. At 
start the frequency was more, but then decreased. It's been almost one 
hour, but still not resolved completely. Please find stacktrace below.

  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/ext/ndb/model.py",
 
line 3458, in _put
    return self._put_async(**ctx_options).get_result()
  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py",
 
line 383, in get_result
    self.check_success()
  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py",
 
line 427, in _help_tasklet_along
    value = gen.throw(exc.__class__, exc, tb)
  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/ext/ndb/context.py",
 
line 824, in put
    key = yield self._put_batcher.add(entity, options)
  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py",
 
line 427, in _help_tasklet_along
    value = gen.throw(exc.__class__, exc, tb)
  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/ext/ndb/context.py",
 
line 358, in _put_tasklet
    keys = yield self._conn.async_put(options, datastore_entities)
  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py",
 
line 513, in _on_rpc_completion
    result = rpc.get_result()
  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/api/apiproxy_stub_map.py",
 
line 613, in get_result
    return self.__get_result_hook(self)
  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/datastore/datastore_rpc.py",
 
line 1879, in __put_hook
    self.check_rpc_success(rpc)
  File 
"/base/data/home/runtimes/python27_experiment/python27_lib/versions/1/google/appengine/datastore/datastore_rpc.py",
 
line 1371, in check_rpc_success
    raise _ToDatastoreError(err)
InternalError: internal error.

Can anyone suggest anything??

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