cpu too high

mport etcd3
import json
import time

etcd = etcd3.client(host='127.0.0.1', port=2379)

while True:
try:
etcd.put('test', '123456')
time.sleep(1)
print '===='
except Exception as error:
print 'error'

if kill the etcd server, then the cpu of the client is too high, maybe 80%

Run the provided Python snippet with the etcd server stopped and confirm the client CPU usage. Then trace the client behavior after the connection fails; done means the client no longer consumes excessive CPU while the server is unavailable.

Written by the indexing model from the issue text.