Could not connect to host "xxxxxx" to determine the OS type. This host cannot currently be monitored. (4339473)

Infrastructure Cartridge (IC) agent throws error "Could not connect to host "xxxxxx" to determine the OS type. This host cannot currently be monitored".

In the Agent Manager logs:

2016-05-19 10:29:45.987 ECHO    ERROR [HostActivitiesCreator[4613]-1] com.dell.foglight.infrastructure.UnixAgentDelegate - Could not connect to host "xxxxxx" to determine the OS type. This host cannot currently be monitored.
2016-05-19 10:29:45.987 ECHO    ERROR [HostActivitiesCreator[4613]-1] com.dell.foglight.infrastructure.InfrastructureAgent - No activities for host "xxxxxx" were provided by agent "com.dell.foglight.infrastructure.UnixAgent@5699de79".
2016-05-19 10:29:45.987 ECHO    ERROR [HostActivitiesCreator[4613]-1] com.dell.foglight.infrastructure.InfrastructureAgent - Unable to create data collection actions for configuration com.dell.foglight.infrastructure.DellUnixAgentPropertyWrapperSnapshot@fc33b739. No monitoring will be done for this configuration.
2016-05-19 10:29:45.994 ECHO    ERROR [fb8be857-fbcf-4747-973d-295a8570e581/HostAgents/5.8.5/DellUnixAgent/Monitor@xxxxxx[4617]-0] com.dell.foglight.infrastructure.InfrastructureAgent - No hosts have been configured for this agent to monitor.
2016-05-19 10:29:45.994 ECHO    ERROR [fb8be857-fbcf-4747-973d-295a8570e581/HostAgents/5.8.5/DellUnixAgent/Monitor@xxxxxxxx[4617]-0] com.dell.foglight.infrastructure.InfrastructureAgent - No activities were provided by agent com.dell.foglight.infrastructure.UnixAgent@5699de79.

According to Foglight™ for Infrastructure User and Reference Guide:

• The DellUnixAgent monitors Linux® and Oracle Solaris® platforms
• The UnixAgent monitors Linux, Oracle Solaris, HP-UX, or AIX systems 

For HP-UX monitored host, use UnixAgent instead of DellUnixAgent.  For detail information about the UnixAgent or DellUnixAgent, please refer here.