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Oracle VM: Re-Discovering an Oracle VM Server with a Dynamic IP address shows ERROR "I/O error while communicating with HTTP server: Connection refused" (Doc ID 2037202.1)

Last updated on OCTOBER 10, 2022

Applies to:

Oracle VM - Version 3.2.1 and later
Oracle Cloud Infrastructure - Version N/A and later
Information in this document applies to any platform.


*** NOTE *** As stated in the Network Requirements section of the Oracle VM Installation and Upgrade guide, the Oracle VM server requires at least one stable and static IP address that does not change over server reboots.  This can be accomplished by providing a static IP during installation or configure DHCP to allocate static IP addresses based on the MAC address of eth0/bond0 for each server 

On Oracle VM, in some testing and/or development environments, the Oracle VM Servers are getting their IP addresses assigned dynamically, e.g. using DHCP.

 After a server reboot, the server is being reported by the Oracle VM manager as offline and attempting to re-discover it fails with the following kind of error message :

OVMAPI_4010E Attempt to send command: discover_hardware to server: ovs1 failed. OVMAPI_4004E Sync command failed on server: Command: discover_hardware, Server error: org.apache.xmlrpc.XmlRpcException: I/O error while communicating with HTTP server: Connection refused [Tue Jul 28 09:31:21 CEST 2015] [Tue Jul 28 09:31:21 CEST 2015]

 The issue doesn't reproduce after each reboot, it appears to be happening randomly, more often when the OVS server has been powered off for a long time.


Reboot of the server.


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