[SOLVED] yum database is locked

Issue

When I do yum update I get the following error response:

One of the configured repositories failed (Unkown), 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= ...

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 or subscription-manager repos --disable=

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=.skip_if_unavailable=true

   database is locked

I already did yum clean all, rm -f /var/lib/rpm/__db* and rpm --rebuilddb without any change.

Solution

After spending couple of days, finally fixed this error by deleting the following folder

/var/lib/yum/history 

Answered By - Abhishek Galoda