Incompatible Changes in Cloudera Data Science Workbench 1.2.0

Proxy Configuration Change: [DSE-2948] If you are using a proxy server, you must ensure that the IP addresses for the web and Livelog services are skipped from the proxy.

Depending on your deployment (parcel or package), append the following IP addresses to either the No Proxy property in the Cloudera Manager CDSW service, or to the NO_PROXY parameter in cdsw.conf.
100.77.0.129
100.77.0.130

These have also been added to the installation instructions.