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运行yum命令报错的解决方法记录

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使用yum命令式报错:thread.error: can't start new thread。
错误具体内容为:

[root@lxy.me]# yum update
Loaded plugins: fastestmirror
Determining fastest mirrors
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 _getTsInfo
    pkgSack = self.pkgSack
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 661, in <lambda>
    pkgSack = property(fget=lambda self: self._getSacks(),
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 501, in _getSacks
    self.repos.populateSack(which=repos)
  File "/usr/lib/python2.4/site-packages/yum/repos.py", line 232, in populateSack
    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/lib/python2.4/threading.py", line 416, in start
    _start_new_thread(self.__bootstrap, ())
thread.error: can't start new thread

解决办法:禁用fastestmirror,将/etc/yum/pluginconf.d/fastestmirror.conf中的enabled=1改成enabled=0;

禁用后还出现如下错误提示:

Component: pirut
Summary: TBe8ae967a sqlitesack.py:94:_read_db_obj:TypeError: unsubscriptable object

Traceback (most recent call last):
File "/usr/sbin/pup", line 407, in _apply
    output = self.applyChanges(self.mainwin)
File "/usr/lib/python2.4/site-packages/pirut/__init__.py", line 813, in applyChanges
    self.checkDeps(mainwin)
File "/usr/lib/python2.4/site-packages/pirut/__init__.py", line 550, in checkDeps
    (result, msgs) = self.buildTransaction()
File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 647, in buildTransaction
    (rescode, restring) = self.resolveDeps()
File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 704, in resolveDeps
    for po, dep in self._checkFileRequires():
File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 939, in _checkFileRequires
    if not self.tsInfo.getOldProvides(filename) and not self.tsInfo.getNewProvides(filename):
File "/usr/lib/python2.4/site-packages/yum/transactioninfo.py", line 414, in getNewProvides
    for pkg, hits in self.pkgSack.getProvides(name, flag, version).iteritems():
File "/usr/lib/python2.4/site-packages/yum/packageSack.py", line 300, in getProvides
    return self._computeAggregateDictResult("getProvides", name, flags, version)
File "/usr/lib/python2.4/site-packages/yum/packageSack.py", line 470, in _computeAggregateDictResult
    sackResult = apply(method, args)
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 861, in getProvides
    return self._search("provides", name, flags, version)
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 43, in newFunc
    return func(*args, **kwargs)
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 837, in _search
    for pkg in self.searchFiles(name, strict=True):
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 43, in newFunc
    return func(*args, **kwargs)
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 586, in searchFiles
    self._sql_pkgKey2po(rep, cur, pkgs)
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 470, in _sql_pkgKey2po
    pkg = self._packageByKey(repo, ob['pkgKey'])
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 413, in _packageByKey
    po = self.pc(repo, cur.fetchone())
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 68, in __init__
    self._read_db_obj(db_obj)
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 94, in _read_db_obj
    setattr(self, item, _share_data(db_obj[item]))
TypeError: unsubscriptable object

Local variables in innermost frame:
item: name
db_obj: None

这个问题是由于yum的原数据损坏导致的。
需要先删除原数据和数据库缓存,然后重建,问题即可解决。
解决方法:依次运行以下命令:

yum clean metadata //删除原数据,通常执行这句就能解决,如果这句不能解决问题,继续下面操作
yum clean dbcache //删除数据库缓存
yum makecache //重建缓存

通过上述方法,yum命令执行成功


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