TCP/IP, OMVS, Resolver, VTAM address space being available

ERRNO=2 ERRNOJR=78801000
ERRNO=70 ERRNOJR=12CA00B6

When required services are not yet available for socket communications, some of the common reasons are revealed in system logger messages IXG371E and IXG372I.

IXG371E ZAI LOGSTREAM CLIENT MANAGER UNAVAILABLE REASON:

OMVS NOT INITIALIZED OR IS UNAVAILABLE.: OMVS has not been initialized or z/OS® UNIX System Services is not available.
OMVS BPX-SERVICE ERROR.: An error was encountered on a BPX-service request.

IXG372I LOGSTREAM CLIENT MANAGER ERROR FOR item logstream:

FUNCTION=BPX1GAI ERRNO=00000002 ERRNOJR=78801000: Logger BPX1GAI request to determine the location (getaddrinfo) for the ZAI SERVER value could not be satisfied since the 'Resolver' is not available. Ensure the Resolver is started.
FUNCTION=BPX1SOC ERRNO=00000070 ERRNOJR=12CA00B6: Logger BPX1SOC request to create a socket to the IBM zAware server could not be satisfied since the physical file system (PFS) was not available.

The z/OS Communications Server environment must be available, that is, the z/OS UNIX System Services (OMVS) and resolver address spaces, VTAM® address space and appropriate TCP/IP address space have been started. Also the necessary TCP/IP (network) definitions provided for the server location need to be determined in order for logger to establish a (socket) connection to the IBM zAware server. See z/OS Communications Server: IP Configuration Guide and z/OS UNIX System Services Planning for additional details for establishing the desired environment.

Verify that the OMVS, Resolver, VTAM, and TCP/IP address spaces have completed initialization. Look for the following messages:

EZZ9291I RESOLVER INITIALIZATION COMPLETE
BPXI004I OMVS INITIALIZATION COMPLETE
IST020I VTAM INITIALIZATION COMPLETE FOR level