RHEL 6.x – yum gives "ImportError: No module named cElementTree" errors

环境:centos6.3 , oracle11.2.0.1

安装完oracle后,发现yum报错
如下:
# yum update
Plugin "refresh-packagekit" can't be imported
Loaded plugins: priorities, protectbase, remove-with-leaves, security
Traceback (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 276, in user_main
errcode = main(args)
File "/usr/share/yum-cli/yummain.py", line 129, 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 883, in <lambda>
pkgSack = property(fget=lambda self: self._getSacks(),
File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 668, in _getSacks
self.repos.populateSack(which=repos)
File "/usr/lib/python2.6/site-packages/yum/repos.py", line 294, in populateSack
sack.populate(repo, mdtype, callback, cacheonly)
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 164, in populate
if self._check_db_version(repo, mydbtype):
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 222, in _check_db_version
return repo._check_db_version(mdtype)
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1263, in _check_db_version
repoXML = self.repoXML
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1462, in <lambda>
repoXML = property(fget=lambda self: self._getRepoXML(),
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1454, in _getRepoXML
self._loadRepoXML(text=self)
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1444, in _loadRepoXML
return self._groupLoadRepoXML(text, self._mdpolicy2mdtypes())
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1419, in _groupLoadRepoXML
if self._commonLoadRepoXML(text):
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1237, in _commonLoadRepoXML
result = self._getFileRepoXML(local, text)
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1015, in _getFileRepoXML
size=102400) # setting max size as 100K
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 837, in _getFile
size=size
File "/usr/lib/python2.6/site-packages/urlgrabber/mirror.py", line 408, in urlgrab
return self._mirror_try(func, url, kw)
File "/usr/lib/python2.6/site-packages/urlgrabber/mirror.py", line 394, in _mirror_try
return func_ref( *(fullurl,), **kwargs )
File "/usr/lib/python2.6/site-packages/urlgrabber/grabber.py", line 985, in urlgrab
return self._retry(opts, retryfunc, url, filename)
File "/usr/lib/python2.6/site-packages/urlgrabber/grabber.py", line 886, in _retry
r = apply(func, (opts,) + args, {})
File "/usr/lib/python2.6/site-packages/urlgrabber/grabber.py", line 980, in retryfunc
apply(cb_func, (obj, )+cb_args, cb_kwargs)
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1501, in _checkRepoXML
repoXML = repoMDObject.RepoMD(self.id, filepath)
File "/usr/lib/python2.6/site-packages/yum/repoMDObject.py", line 124, in __init__
self.parse(srcfile)
File "/usr/lib/python2.6/site-packages/yum/repoMDObject.py", line 140, in parse
parser = iterparse(infile)
File "/usr/lib/python2.6/site-packages/yum/misc.py", line 1169, in cElementTree_iterparse
_cElementTree_import()
File "/usr/lib/python2.6/site-packages/yum/misc.py", line 1164, in _cElementTree_import
import cElementTree
ImportError: No module named cElementTree

原因:
The fix:
Apparently, the Oracle installation on this system injected Oracle’s path into LD_LIBRARY_PATH…

[root@dev1v etc]# export
declare -x LD_LIBRARY_PATH="/home/oracle/app/oracle/product/11.2.0/client_1/lib"

Unsetting the variable allowed yum to function properly again.

或把root下的 /etc/profile 把oracle相关的定义去掉就可以.

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