openshift-master server won't start because of corrupted etcd wal file.

Issue

Openshift does not start properly occuring following error messages :

master.example.com systemd[1]: openshift-master[33889]: 2015/07/13 13:35:03 etcdserver: read wal error: unexpected EOF
master.example.com systemd[1]: openshift-master.service: main process exited, code=exited, status=1/FAILURE

It seems that file system is full and /var/lib/openshift/openshift.local.etcd/member/wal/ gets corrupt.

How to recover openshift master?

• Why do we see below messages when restarting the master :

janv. 06 11:10:14 masterv3ft.acs.altran.com openshift[9584]: loaded cluster information from store: <nil>
janv. 06 11:10:14 masterv3ft.acs.altran.com openshift[9584]: read wal error (walpb: crc mismatch) and cannot be repaired
janv. 06 11:10:14 masterv3ft.acs.altran.com systemd[1]: atomic-openshift-master.service: main process exited, code=exited, status=1/FAILURE
janv. 06 11:10:14 masterv3ft.acs.altran.com systemd[1]: Failed to start Atomic OpenShift Master.