In a clustered environment, an Enterprise Manager serves as a Manager of Managers (MOM), managing the other Enterprise Managers in the cluster. When this problem occurs, the APM MOM log shows an error indicated a corrupted metadata file.
10.5.1 MOM, using NFS version 3
Network File System (NFS) 3 is outdated
Using Network File System (NFS) version 4, the issue is resolved and these errors cannot be reproduced. There is no fix for earlier releases; please upgrade to version 4 or a later release to obtain the fix.