how to fix broken YUM in CentOS
When we type the command yum, we encounter the error such as the one below.
# yum update Loaded plugins: downloadonly, fastestmirror Loading mirror speeds from cached hostfile Traceback (most recent call last): File "/usr/bin/yum", line 29, in ? yummain.user_main(sys.argv[1:], exit_code=True) File "/usr/share/yum-cli/yummain.py", line 309, in user_main errcode = main(args) File "/usr/share/yum-cli/yummain.py", line 178, in main result, resultmsgs = base.doCommands() File "/usr/share/yum-cli/cli.py", line 345, in doCommands self._getTs(needTsRemove) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 101, in _getTs self._getTsInfo(remove_only) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 112, in _getTsIn fo pkgSack = self.pkgSack File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 661, in pkgSack = property(fget=lambda self: self._getSacks(), File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 501, in _getSack s self.repos.populateSack(which=repos) File "/usr/lib/python2.4/site-packages/yum/repos.py", line 232, in populateSac k self.doSetup() File "/usr/lib/python2.4/site-packages/yum/repos.py", line 79, in doSetup self.ayum.plugins.run('postreposetup') File "/usr/lib/python2.4/site-packages/yum/plugins.py", line 179, in run func(conduitcls(self, self.base, conf, **kwargs)) File "/usr/lib/yum-plugins/fastestmirror.py", line 181, in postreposetup_hook all_urls = FastestMirror(all_urls).get_mirrorlist() File "/usr/lib/yum-plugins/fastestmirror.py", line 333, in get_mirrorlist self._poll_mirrors() File "/usr/lib/yum-plugins/fastestmirror.py", line 376, in _poll_mirrors pollThread.start() File "/usr/lib64/python2.4/threading.py", line 416, in start _start_new_thread(self.__bootstrap, ()) thread.error: can't start new thread
Possible Solution 1: (which solve my problem immediately). Modify the the following.
# yum clean all # vim /etc/yum/pluginconf.d/fastestmirror.conf
enabled=0
Possible Solution 2: The good old yum clean all. (Clean everything)
# yum clean all Loaded plugins: downloadonly, fastestmirror Cleaning up Everything Cleaning up list of fastest mirrors
Possible Solution 3: Rebuild the yum database
# yum clean all # rm -f /var/lib/rpm/__db* # rpm --rebuilddb # yum update
Hope this help.
Courtesy: http://linuxtoolkit.blogspot.com/2012/02/how-to-fix-broken-yum-for-centos.html