HI,

We encountered the issue last week in our Openstack cloud with following symptoms.

1. Can create instances and can SSH with out issue.
2. Can WGET from the instances to internet.
3. When trying to SCP to instances it is getting hang and not getting copied.

Could not find details from the log files, finally rebooted the Controller server which resolved the issue. Can any one give some instructions/ideas to resolve this situation if encountered again?

 - Details
    Controller is on RHEL 7
    Openstack Juno is installed using RDO
    We are having 4 compute  nodes with 1 TB RAM and SAN mounted using multipath.
    Currently we are having nearly 178 active instances.

Thank You, Chamara