yum update 升级报错的解决办法

# yum update
loaded plugins: 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 229, in user_main
errcode = main(args)
file “/usr/share/yum-cli/yummain.py”, line 104, in main
result, resultmsgs = base.docommands()
file “/usr/share/yum-cli/cli.py”, line 339, 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 _gettsinfo
pkgsack = self.pkgsack
file “/usr/lib/python2.4/site-packages/yum/__init__.py”, line 591, in
pkgsack = property(fget=lambda self: self._getsacks(),
file “/usr/lib/python2.4/site-packages/yum/__init__.py”, line 434, in _getsacks
self.repos.populatesack(which=repos)
file “/usr/lib/python2.4/site-packages/yum/repos.py”, line 223, in populatesack
self.dosetup()
file “/usr/lib/python2.4/site-packages/yum/repos.py”, line 71, in dosetup
self.ayum.plugins.run(‘postreposetup’)
file “/usr/lib/python2.4/site-packages/yum/plugins.py”, line 176, 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/lib/python2.4/threading.py”, line 416, in start
_start_new_thread(self.__bootstrap, ())
thread.error: can’t start new thread

yum –disableplugin=fastestmirror update