"User root@127.0.0.1 logged in" every minute ?

Hi,

We observe that 2 ESXi 5 Hosts in the same cluster (We only have 2 ESXi Hosts in that Cluster) get the following message every minute:

User root@127.0.0.1 logged in

User root logged out

Both ESXi Host and vCenter Server are of the latest build.  We also don't get such message in other Clusters of ESXi 5 Hosts.

That 2 ESXi Hosts are running on IBM Server with the latest IBM CIM installed.

Your advice is sought.

Thanks