Networking code sometimes throws UnknownHostException
问题 I am trying to data from a server. Sometimes my code fails due to an UnknownHostException . Why is that? What is the cause of this problem? 回答1: This may occur if a hiccup in DNS server has occurred. Apart from making the DNS server more robust or looking for another one, you can also just use the full IP address instead of the hostname. This way it doesn't need to lookup the IP address based on the hostname. However, I would rather fix the DNS issue and prefer the DNS since IP addresses may