I had a server run out of space recently, to the point that it couldn't complete the yum update. This server ended up corrupting a yum packages database.
Here's how corrupted YUM database looks
Correctly called rpmdb, packaged database used by YUM looks like this when it can't be opened:
root@s3:/ # yum update error: db5 error(11) from dbenv->open: Resource temporarily unavailable error: cannot open Packages index using db5 - Resource temporarily unavailable (11) error: cannot open Packages database in /var/lib/rpm CRITICAL:yum.main: Error: rpmdb open failed
Rebuilding RPM DB
The fix is to rebuild the RPM database, like this:
root@s3:/ # rpm --rebuilddb
and just to try things, do the same yum update – it should work now:
root@s3:/backup/linux # yum update Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: centos.mirror.ate.info * epel: mirror.1000mbps.com * extras: rep-centos-fr.upress.io * updates: centos.mirror.ate.info Resolving Dependencies ...
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