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WebLogic Server Startup Failed With Error: java.net.UnknownHostException: x.y.z: unknown error - Due to DNS Caching (Doc ID 2432463.1)

Last updated on AUGUST 14, 2018

Applies to:

Oracle WebLogic Server - Version 10.3.6 and later
Information in this document applies to any platform.

Symptoms

When attempting to start WebLogic Admin Server, a java.net.UnknownHostException occurs with an unknown error and error stack indicating java.net.Inet6AddressImpl.lookupAllHostAddr was performed:




Changes

 Recently changed the hostname and IP mapping at the firewall/DNS level.

Cause

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