Problem

Error Detail Message:
java.net.UnknownHostException


Cause


  • The DNS server is incorrectly specified in the Operating System's configuration.
  • The DNS server is correctly specified in the Operating System's configuration, but the DNS server itself is misconfigured
  • The hostname that JIRA is attempting to resolve is incorrect
  • There is some other network error causing the JIRA instance to be unable to reach the DNS server

Solution

 You can enable the java networking logging  and take a closer look at the traffic.


Alternatively you can switch over to a different DNS server.