How to solve the "unicodedecodeerror: 'ascii 'codec" problem when using yum in centos

Problem

When centos 6.5 is installed, the following error occurs when you plan to use the yum Installer:

Loading mirror speeds from cached hostfileTraceback (most recent call last):  File "/usr/bin/yum", line 29, in <module>    yummain.user_main(sys.argv[1:], exit_code=True)  File "/usr/share/yum-cli/yummain.py", line 285, in user_main    errcode = main(args)  File "/usr/share/yum-cli/yummain.py", line 136, in main    result, resultmsgs = base.doCommands()  File "/usr/share/yum-cli/cli.py", line 434, in doCommands    self._getTs(needTsRemove)  File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 99, in _getTs    self._getTsInfo(remove_only)  File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 110, in _getTsInfo    pkgSack = self.pkgSack  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 887, in <lambda>    pkgSack = property(fget=lambda self: self._getSacks(),  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 669, in _getSacks    self.repos.populateSack(which=repos)  File "/usr/lib/python2.6/site-packages/yum/repos.py", line 279, in populateSack    self.doSetup()  File "/usr/lib/python2.6/site-packages/yum/repos.py", line 105, in doSetup    self.ayum.plugins.run('postreposetup')  File "/usr/lib/python2.6/site-packages/yum/plugins.py", line 184, in run    func(conduitcls(self, self.base, conf, **kwargs))  File "/usr/lib/yum-plugins/fastestmirror.py", line 197, in postreposetup_hook    if downgrade_ftp and _len_non_ftp(repo.urls) == 1:  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 699, in <lambda>    urls = property(fget=lambda self: self._geturls(),  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 696, in _geturls    self._baseurlSetup()  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 648, in _baseurlSetup    self.mirrorurls = self._replace_and_check_url(mirrorurls)  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 691, in _replace_and_check_url    print 'YumRepo Error: All mirror URLs are not using ftp, http[s] or file.\n Eg. %s' % misc.to_utf8(skipped)  File "/usr/lib64/python2.6/codecs.py", line 351, in write    data, consumed = self.encode(object, self.errors)UnicodeDecodeError: 'ascii' codec can't decode byte 0xbc in position 3746: ordinal not in range(128)

Solution

Perform the following operations in sequence:

 cd /var/lib/rpm/rm -i __db.*yum clean allyum history new

How to solve the "unicodedecodeerror: 'ascii 'codec" problem when using yum in centos