DUAS synchronization with UVMS KO u_retrieve_ipaddress_from u_gethostbyname_mf Unknown host

Products

• CA Automic Dollar Universe

Issue/Introduction

A node appears with the status "Connected with warning" in the Node list and the universe.log of the node, these kinds of messages appear every three or five minutes:

|ERROR|X|IO |pid=p.t| u_retrieve_ipaddress_from | u_gethostbyname_mf(uvms_hostname) returns error: Unknown host (gethostbyname_r(uvms_hostname) returns 0) 
|ERROR|X|IO |pid=p.t| connectUVMSgenericHA | Unable to connect to UVMS uvms_hostname:4184 (2/2) 
|ERROR|X|IO |pid=p.t| connectUVMSgenericHA | No UVMS reachable (2 instances unreachable) 
|ERROR|X|IO |pid=p.t| o_sync_uvms | Unable to connect to UVMS with passphrase

When the DUAS node has never been synchronized with the UVMS, after a new installation, the DUAS node may not be reachable via Univiewer Console. In that case, the error "Authentication: access denied" occurs:

 

Note that if the error looks like below, with error code -1 instead of 0, the following article applies: 

|ERROR|X|IO |pid=p.t| u_retrieve_ipaddress_from | u_gethostbyname_mf(uvms_hostname) returns error: Unknown host (gethostbyname_r(uvms_hostname) returns -1)

Environment

OS: All

Version: 6.x or 7.x

Component: Dollar Universe Application Server (node)

Cause

DNS did not have a correct record for the UVMS hostname which keeps the connection from the node to the UVMS impossible, so synchronization of the security from UVMS could no longer be received.

Resolution

Solution:

Fix the DNS record for the UVMS hostname so that the server where the Dollar Universe node is installed can resolve the IP address of the hostname.

Workaround:

Create an entry for the UVMS hostname with its corresponding IP in the 'hosts' file (/etc/hosts or C:\Windows\System32\drivers\etc\hosts) on the server where Dollar Universe is installed.