[CentOS] Yum hangs while doing anything

Hmm.  Not even trying to do an update and yum hangs:

# ls /var/run/yum*
ls: /var/run/yum*: No such file or directory
# yum -d 10 info xulrunner
Loading "aliases" plugin
Loading "allowdowngrade" plugin
Loading "changelog" plugin
Loading "downloadonly" plugin
Loading "fastestmirror" plugin
Loading "filter-data" plugin
Loading "kernel-module" plugin
Loading "keys" plugin
Loading "kmod" plugin
Loading "list-data" plugin
Loading "merge-conf" plugin
Loading "priorities" plugin
Loading "security" plugin
Loading "tsflags" plugin
Loading "verify" plugin
Running "config" handler for "aliases" plugin
Running "config" handler for "allowdowngrade" plugin
Running "config" handler for "changelog" plugin
Running "config" handler for "downloadonly" plugin
Running "config" handler for "filter-data" plugin
Running "config" handler for "keys" plugin
Running "config" handler for "list-data" plugin
Running "config" handler for "merge-conf" plugin
Running "config" handler for "priorities" plugin
Running "config" handler for "security" plugin
Running "config" handler for "verify" plugin