yum安装rabbitmq报yum doesn't have enough cached data to continue

文章参考自：https://www.cnblogs.com/rwxwsblog/p/5765886.html

利用yum安装rabbitmq过程中，执行yum makecache命令时，下载erlang-solutions/7/x86_64/prim过程中，经常Trying other mirror.

报错的情况如下：

erlang-solutions                                                                             1039/1039
erlang-solutions/7/x86_64/filelists                                             | 1.5 MB  00:00:00     
http://packages.erlang-solutions.com/rpm/centos/7/x86_64/repodata/filelists.xml.gz: [Errno -1] Metadata file does not match checksum
Trying other mirror.

 One of the configured repositories failed (Centos 7 - x86_64 - Erlang Solutions),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=erlang-solutions ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable erlang-solutions
        or
            subscription-manager repos --disable=erlang-solutions

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=erlang-solutions.skip_if_unavailable=true

failure: repodata/filelists.xml.gz from erlang-solutions: [Errno 256] No more mirrors to try.
http://packages.erlang-solutions.com/rpm/centos/7/x86_64/repodata/filelists.xml.gz: [Errno -1] Metadata file does not match checksum

解决方法：

1、/usr/bin/vi /etc/yum.repos.d/epel.repo

将文件中mirrorlist改为baseurl，并把这条的注释符号去掉。

2、vi /etc/resolv.conf

添加nameserver 144.144.144.144

做完这两步执行yum makecache还是不行，第二天执行就通过了。具体不知道是不是这两步的原因。