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Puppet/Hiera：服务器上出现错误 400：未定义 Hiera::Backend:Module 的方法“empty_answer”

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Puppet/Hiera：服务器上出现错误 400：未定义 Hiera::Backend:Module 的方法“empty_answer”

我让 Puppet Master 运行了相当长一段时间。最近重新启动该进程后，我开始收到以下信息：

    # puppet agent -t
    info: Retrieving plugin
    info: Loading facts in /var/lib/puppet/lib/facter/mountpoints.rb
    info: Loading facts in /var/lib/puppet/lib/facter/pe_version.rb
    info: Loading facts in /var/lib/puppet/lib/facter/concat_basedir.rb
    info: Loading facts in /var/lib/puppet/lib/facter/disks.rb
    info: Loading facts in /var/lib/puppet/lib/facter/root_home.rb
    info: Loading facts in /var/lib/puppet/lib/facter/puppet_vardir.rb
    err: Could not retrieve catalog from remote server: Error 400 on SERVER: undefined method `empty_answer' for Hiera::Backend:Module at /etc/puppet/environments/production/modules/sshauthkeys/manifests/helper.pp:2

如果我跑

    hiera -c /etc/puppet/hiera.yaml <key>

它按预期工作。知道这可能是什么吗？

我正在运行 puppet 2.7、hiera 1.2.1 和 hiera-puppet 1.0.0

亲切的问候，

克里斯蒂安

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