Patching CentOS 7 (and overcoming problems)

So I was working on patching some of my Icinga infrastructure at work, and it seems that sometimes libyajl breaks things, as illustrated below

root@icingasatellite ~]# yum update
Loaded plugins: fastestmirror, rhnplugin
This system is receiving updates from RHN Classic or Red Hat Satellite.
Loading mirror speeds from cached hostfile

  • epel: mirror.optus.net
    Resolving Dependencies
    --> Running transaction check
    ---> Package icinga2.x86_64 0:2.10.4-1.el7.icinga will be updated
    ---> Package icinga2.x86_64 0:2.10.5-1.el7.icinga will be an update
    ---> Package icinga2-bin.x86_64 0:2.10.4-1.el7.icinga will be updated
    ---> Package icinga2-bin.x86_64 0:2.10.5-1.el7.icinga will be an update
    --> Processing Dependency: libyajl.so.2()(64bit) for package: icinga2-bin-2.10.5-1.el7.icinga.x86_64
    Traceback (most recent call last):
    File "/bin/yum", line 29, in
    yummain.user_main(sys.argv[1:], exit_code=True)
    File "/usr/share/yum-cli/yummain.py", line 375, in user_main
    errcode = main(args)
    File "/usr/share/yum-cli/yummain.py", line 239, in main
    (result, resultmsgs) = base.buildTransaction()
    File "/usr/lib/python2.7/site-packages/yum/
    init.py", line 1198, in buildTransaction
    (rescode, restring) = self.resolveDeps()
    File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 893, in resolveDeps
    CheckDeps, checkinstalls, checkremoves, missing = self._resolveRequires(errors)
    File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 1025, in _resolveRequires
    (checkdep, missing, errormsgs) = self._processReq(po, dep)
    File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 350, in _processReq
    CheckDeps, missingdep = self._requiringFromTransaction(po, requirement, errormsgs)
    File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 680, in _requiringFromTransaction
    rel=pkg.rel)
    File "/usr/lib/python2.7/site-packages/yum/
    init.py", line 5280, in update
    availpkgs = self._compare_providers(availpkgs, requiringPo)
    File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 1648, in _compare_providers
    bestnum = max(pkgresults.values())
    ValueError: max() arg is an empty sequence

Turns out the secret is simply to install yaljl and yajal-devel and then I can patch successfully, really surprised nobody else out there has run into this yet but its the second time in a month I have had it happen when patching.

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