08904ba8__in_Ruby__Python_and_C_Clients__What_should_the_client_do_
[Error Code Received] LCB_ETIMEOUT [What does it mean?] The server operation timed out [What should the client do?] 
This can occur if a server in the cluster fails and Couchbase yet has to detect this failure. The client should retry after some time.
Handling Runtime Errors in Ruby, Python and C Clients
What should the client do?