GCP components update causes "ConnectionRefusedError: [Errno 111] Connection refused" errors - google-cloud-platform

Question

My GCP deployment was working fine until I did "gcloud components update" two weeks ago. I understand that the command updates the libraries, and there was an option to revert back to the previous version at the end of the update, but I do not understand why there are so many connection-refused errors with the new update. On the client side, I see "502 Bad Gateway errors". These errors are not consistent. I see them occurring 12 times in the last 48 minutes.
2018-07-31 09:13:19.000 MST
Traceback (most recent call last): File "/env/lib/python3.6/site-packages/urllib3/connection.py", line 171, in _new_conn (self._dns_host, self.port), self.timeout, **extra_kw) File "/env/lib/python3.6/site-packages/urllib3/util/connection.py", line 79, in create_connection raise err File "/env/lib/python3.6/site-packages/urllib3/util/connection.py", line 69, in create_connection sock.connect(sa) ConnectionRefusedError: [Errno 111] Connection refused
Expand all | Collapse all
{
insertId: "crhycg4civkq14" 
labels: {…} 
logName: "projects/eps-server/logs/appengine.googleapis.com%2Fstderr" 
receiveTimestamp: "2018-07-31T16:13:24.966198879Z" 
resource: {…} 
textPayload: "Traceback (most recent call last):
File "/env/lib/python3.6/site-packages/urllib3/connection.py", line 171, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "/env/lib/python3.6/site-packages/urllib3/util/connection.py", line 79, in create_connection
raise err
File "/env/lib/python3.6/site-packages/urllib3/util/connection.py", line 69, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused
" 
timestamp: "2018-07-31T16:13:19Z" 
}
2018-07-31 09:13:19.000 MST
AuthMetadataPluginCallback "<google.auth.transport.grpc.AuthMetadataPlugin object at 0x7fdd9f316b00>" raised exception!
Expand all | Collapse all
{
insertId: "crhycg4civkq14" 
labels: {…} 
logName: "projects/eps-server/logs/appengine.googleapis.com%2Fstderr" 
receiveTimestamp: "2018-07-31T16:13:24.966198879Z" 
resource: {…} 
textPayload: "AuthMetadataPluginCallback "<google.auth.transport.grpc.AuthMetadataPlugin object at 0x7fdd9f316b00>" raised exception!
" 
timestamp: "2018-07-31T16:13:19Z" 
}