error: Failed to initialize NSS library

您可能在RHEL 7.3系统上运行" Yum更新"时遇到以下问题：

error: Failed to initialize NSS library
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
cannot import name ts
Please install a package which provides this module, or
verify that the module is installed correctly.
It's possible that the above module doesn't match the
current version of Python, which is:
2.7.5 (default, Aug 2 2015, 04:20:16)
[GCC 4.8.5 20140623 (Red Hat 4.8.5-4)]
If you cannot solve this problem yourself, please go to
the yum faq at:
http://yum.baseurl.org/wiki/Faq

显然，某些更新的组件在版本方面与系统中现有的未更新组件"不同步"。

要解决此问题，您需要使用" libnspr4"共享库调用yum，升级nspr。

1.下载libnspr4共享库：

www.theitroad.local/rhel/libnspr4.so.tar.bz2

备用链接(需要订阅)：https：//access.redhat.com/node/3134931/40/0

2.打开包装：

tar -jxvf libnspr4.so_.tar.bz2

3.调用Yum：

LD_PRELOAD=./libnspr4.so yum update nspr

Yum现在应该工作。