Unable to run "port selfupdate"

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zeus:~ root# port -d selfupdate DEBUG: MacPorts sources location: /opt/local/var/macports/sources/rsync.macports.org/release/tarballs ---> Updating MacPorts base sources using rsync rsync: getaddrinfo: rsync.macports.org 873: nodename nor servname provided, or not known rsync error: error in socket IO (code 10) at /SourceCache/rsync/rsync-45/rsync/clientserver.c(105) [receiver=2.6.9] Command failed: /usr/bin/rsync -rtzv --delete-after rsync://rsync.macports.org/release/tarballs/base.tar /opt/local/var/macports/sources/rsync.macports.org/release/tarballs Exit code: 10 DEBUG: Error synchronizing MacPorts sources: command execution failed

while executing

"macports::selfupdate [array get global_options] base_updated" Error: Error synchronizing MacPorts sources: command execution failed To report a bug, follow the instructions in the guide:

​http://guide.macports.org/#project.tickets

Error: /opt/local/bin/port: port selfupdate failed: Error synchronizing MacPorts sources: command execution failed

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I have resolved the issue thus please proceed to close the ticket,