Updated - 10/16 4pm: This problem has been resolved. Please submit a help ticket if you notice additional issues
We are aware of problems with logins to CCR servers mounting the Isilon storage are hanging. As a workaround, users can hit CTRL+C during the login which will skip the loading of modules and return you to a prompt. However, if you are using modules they will not work at this time. We are in the process of investigating the problem with EMC support.
Thank you for your patience!