communication impossible between uvms/uvc and nodes through the network

Document ID : KB000087117
Last Modified Date : 14/04/2018
Show Technical Document Details
Issue:
Error Message :
From UVC log file: 
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Agent IO Connection problem - ServerException - connect: error creating socket to node_name/port_number
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From unijob universe.log file: 
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u_connect | u_gethostbyname_mf(uvms_node_name) returns error: Unknown host (gethostbyname(uvms_node_name) returns null pointer)
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From UVMS uvserver.log file:
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ERROR| consolidation-1-worker-xxx| com.orsyp.monitoring.consolidation.stdimpl.owls.OwlsConsolidationStdImpl | ConnectionException: 
com.orsyp.std.IoConnectionException: Connection Authenticate problem com.orsyp.UniverseException: ServerException - connect: error creating socket to distant.hostname.domain/port_number

UniverseException: The server is unreachable. Reason: NIO CDJ Connection problem - ServerException - connect: error creating socket [company_name/node_name/X]
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Patch level detected:Univiewer Management Server 6.3.00
Product Version: Dollar.Universe 6.3.01

Description :The Unijob or Dollar Universe nodes are not accessible from the Univiewer console. It is for example impossible to display the node settings and the job monitor for all the impacted nodes.
The registration process failed too.
Environment:
OS: All
Cause:
Cause type:
Other
Root Cause: To make a connection between the different nodes, we use the TCP IP protocol, so basically, some ports and an IP address.
Resolution:
We recommend to check the network configuration using the ping and telnet commands:

Check the ping result between the UVC host and the host where unijob or duas is installed
Check the ping result between the UVMS host and the host where unijob or duas is installed
Check the ping result distant_hostname

If the ping results are not ok, please check the network configuration for each impacted hosts
=> The address ip resolution, DNS or host file, must work correctly.

Check the telnet result between the UVMS host and the duas/unijob host: telnet duas_hostname 10600 (default IO port change if another port is used)
Check the telnet result between the UVC host and the duas/unijob host: telnet duas_hostname 10600 (default IO port change if another port is used)
Check the telnet result between the unijob/duas host and the UVMS host: telnet uvms_hostname 4184 (default port change if another port is used)
If the telnet is not ok the firewall rules must be checked and modified in order to open the concerned ports on the impacted hosts.

In a few words, to have a normal network behaviour, the ping and telnet commands must give positive results for the concerned hostname(and/or IP address) and the concerned port number.

Fix Status: No Fix
 
Additional Information:
Workaround :
N/A