Symptoms

4.0.1.8404134 SP1.2 has been released which resolve the issue After code upgrade the statically configured DNS settings were removed for the management network, contents of file /etc/resolv.conf become erased. User will not receive email about successful completion of upgrade. All services that require DNS name resolution (NTP, SMTP, etc. etc.) will not work properly until DNS settings are re-entered by hand. Other than that, the user will not be able to connect to Unisphere GUI or UEM CLI using the system domain name. Please note that the NAS server DNS settings are not affected by this issue.

Cause

This is currently impacting upgrades involving the below code revisions 4.0.1.8194551 SP1 Code upgrade to product 4.0.1.8194551 erases DNS settings, if the latter were entered manually (Settings -> Management -> DNS Servers: Manage Domain Name Servers -> Configure DNS server address manually). After upgrade the contents of file /etc/resolv.conf are not restored. It will stop the DNS name resolving and delete the domain name information from the system. In turn, it may affect networking services, including NTP and SMTP, and remove the system domain name from the management connection SSL certificate.Due to a persistence of settings issue that may occur post upgrade to Unity OE (Operating Environment) 4.0.1.8194551, EMC decided to remove this Unity and UnityVSA release from support.emc.comA revised OE release is available 4.0.1.8404134 Unity SP1.2 Customers who were planning to upgrade to 4.0.1.8194551 are suggested to wait to upgrade to the upcoming release.For customers already running 4.0.1.8194551, please review that your DNS server preferences are set correctly under Unisphere > Settings > Management > DNS Server, and update as required. Please contact EMC support if you have any questions - go to EMC Online Support at: https://Support.EMC.com. After logging in, locate Create a service request .

Resolution

Current workaround is to recreate the DNS settings in the management setup GUI: Navigate to the Settings Menu in the upper rightClick on the Management section then DNS ServerFor manually configured DNS click Add and re-add the original DNS servers.Click "Apply" button at the bottom of the dialog.Navigate to: System --> Service -->Service TasksSelect "Restart Management Software", then press "Execute"Refresh the browser window. You may need to wait for a few minutes to allow management software to start.If asked, confirm the security exception for this connection. UEMCLI: Connect to the system by IP address.For each DNS address, enter the following command: uemcli /net/dns/config set -nameServer Then restart the management software by the command shown below. Note that it should be executed from the service administrator account: uemcli u service p /service/system restart If the security certificate got changed, accept the new certificate as usual. After the last step you should be able to connect to the system by name again. Upgrade: The latest release of SP1 contains the fix for this issue 4.0.1.84.04134

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