If you configure the SAS object spawner to use the DNSNAME option, the following error might occur when you log on to SAS Studio:

Cannot invoke "java.net.InetAddress.getHostAddress()" because "addr" is null

This failure occurs when SAS Studio attempts to connect back to the workspace server after enabling reconnect and disconnecting. When you configure the SAS object spawner to use the DNSNAME option, it passes only the connection port to SAS Studio. SAS Studio should rely on the URI’s host name information.

There is no workaround for this issue.