$ sudo port selfupdate
Password:
--->  Updating MacPorts base sources using rsync
MacPorts base version 2.3.0 installed,
MacPorts base version 2.3.0 downloaded.
--->  Updating the ports tree
--->  MacPorts base is already the latest version

The ports tree has been updated. To upgrade your installed ports, you should run
  port upgrade outdated
$ sudo port upgrade outdated
--->  Fetching archive for icu
Warning: Your DNS servers incorrectly claim to know the address of nonexistent hosts. This may cause checksum mismatches for some ports. See this page for more information: <https://trac.macports.org/wiki/MisbehavingServers>
--->  Attempting to fetch icu-53.1_0.darwin_13.x86_64.tbz2 from http://mse.uk.packages.macports.org/sites/packages.macports.org/icu
--->  Attempting to fetch icu-53.1_0.darwin_13.x86_64.tbz2.rmd160 from http://mse.uk.packages.macports.org/sites/packages.macports.org/icu
--->  Installing icu @53.1_0
--->  Cleaning icu
--->  Deactivating icu @51.2_1
--->  Cleaning icu
--->  Activating icu @53.1_0
--->  Cleaning icu
--->  Computing dependencies for gettext
--->  Fetching archive for gettext
--->  Attempting to fetch gettext-0.19.1_0.darwin_13.x86_64.tbz2 from http://mse.uk.packages.macports.org/sites/packages.macports.org/gettext
--->  Attempting to fetch gettext-0.19.1_0.darwin_13.x86_64.tbz2.rmd160 from http://mse.uk.packages.macports.org/sites/packages.macports.org/gettext
--->  Installing gettext @0.19.1_0
--->  Cleaning gettext
--->  Computing dependencies for gettext
--->  Deactivating gettext @0.19_0
--->  Cleaning gettext
--->  Activating gettext @0.19.1_0
--->  Cleaning gettext
--->  Computing dependencies for boost
--->  Fetching archive for boost
--->  Attempting to fetch boost-1.55.0_4+no_single+no_static+python27.darwin_13.x86_64.tbz2 from http://mse.uk.packages.macports.org/sites/packages.macports.org/boost
      [                                        ]  95.0 %        speed: 20.2 KiB/s   --->  Attempting to fetch boost-1.55.0_4+no_single+no_static+python27.darwin_13.x86_64.tbz2 from http://lil.fr.packages.macports.org/boost
--->  Attempting to fetch boost-1.55.0_4+no_single+no_static+python27.darwin_13.x86_64.tbz2 from http://nue.de.packages.macports.org/macports/packages/boost
--->  Attempting to fetch boost-1.55.0_4+no_single+no_static+python27.darwin_13.x86_64.tbz2 from http://packages.macports.org/boost
--->  Attempting to fetch boost-1.55.0_4+no_single+no_static+python27.darwin_13.x86_64.tbz2 from http://jog.id.packages.macports.org/macports/packages/boost
--->  Fetching distfiles for boost
--->  Attempting to fetch boost_1_55_0.tar.bz2 from http://aarnet.dl.sourceforge.net/project/boost/boost/1.55.0
--->  Attempting to fetch boost_1_55_0.tar.bz2 from http://citylan.dl.sourceforge.net/project/boost/boost/1.55.0
--->  Verifying checksums for boost                                                  
--->  Extracting boost
Error: org.macports.extract for port boost returned: 
Please see the log file for port boost for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_boost/boost/main.log
Error: Unable to upgrade port: 1
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
$ emacs /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_boost/boost/main.log