Unable to start vCenter service.Failed to start sca, vpxd, vpxd-svcs, vapi-endpoint services. Error:

Unable to access the vCenter UI

service-control --start --all 

Performing start operation on service vmdird...
Successfully started service vmdird 
Performing start operation on service vmcad... 
Successfully started service vmcad 
Performing start operation on service vmware-sts-idmd... 
Successfully started service vmware-sts-idmd 
Performing start operation on service vmware-stsd... 
Successfully started service vmware-stsd 
Performing start operation on service vmdnsd... 
Successfully started service vmdnsd 
Performing start operation on profile: ALL...
Successfully started service vmware-vmon 
Service-control failed. Error: Failed to start services in profile ALL. RC=4, stderr=Failed to start sca, vpxd, vpxd-svcs, vapi-endpoint services. Error: A system error occurred. Check logs for details

/var/log/vmware/vapi/endpoint/endpoint.log

YYYY-MM-DDTHH:MM:SS.955Z | INFO  | state-manager1            | DefaultStateManager            | Invoking configuration-utilities
YYYY-MM-DDTHH:MM:SS.234Z | INFO  | state-manager1            | DefaultStateManager            | Invoking http-server
YYYY-MM-DDTHH:MM:SS.235Z | INFO  | state-manager1            | BaseServerBuilder              | Creating endpoint with name 'default' on address(es): 127.0.0.1, ::1 with port: 12346
YYYY-MM-DDTHH:MM:SS.345Z | INFO  | state-manager1            | DefaultJettyServer             | Logging initialized @13986ms to com.vmware.vapi.endpoint.http.DefaultJettyServer$JettyLogWrapper
YYYY-MM-DDTHH:MM:SS.729Z | WARN  | state-manager1            | BaseServerBuilder              | Failed to bind /0:0:0:0:0:0:0:1:12346 while testing the endpoint validity
java.net.SocketException: Protocol family unavailable
        at java.net.PlainSocketImpl.socketBind(Native Method)
        at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:513)
        at java.net.Socket.bind(Socket.java:661)
        at com.vmware.vapi.endpoint.http.BaseServerBuilder.isPortAccessible(BaseServerBuilder.java:172)
        at com.vmware.vapi.endpoint.http.BaseServerBuilder.trimInvalidEndpoints(BaseServerBuilder.java:148)
        at com.vmware.vapi.endpoint.http.BaseServerBuilder.populateEndpointSettings(BaseServerBuilder.java:184)
        at com.vmware.vapi.endpoint.http.BaseServerBuilder.createServer(BaseServerBuilder.java:233)
        at com.vmware.vapi.endpoint.http.BaseServerBuilder.buildInitial(BaseServerBuilder.java:75)
        at com.vmware.vapi.state.impl.DefaultStateManager.build(DefaultStateManager.java:353)
        at com.vmware.vapi.state.impl.DefaultStateManager$1.doInitialConfig(DefaultStateManager.java:167)
        at com.vmware.vapi.state.impl.DefaultStateManager$1.run(DefaultStateManager.java:150)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
YYYY-MM-DDTHH:MM:SS.769Z | WARN  | state-manager1            | BaseServerBuilder              | Hostname ::1 was found to be invalid and removed from the configuration
YYYY-MM-DDTHH:MM:SS.509Z | INFO  | state-manager1            | BaseServerBuilder              | Starting endpoint with name 'default' on address(es): 127.0.0.1, ::1 with port: 12346
YYYY-MM-DDTHH:MM:SS.786Z | INFO  | state-manager1            | DefaultJettyServer             | Starting jetty server.
YYYY-MM-DDTHH:MM:SS.261Z | INFO  | state-manager1            | BaseServerBuilder              | Started endpoint with name 'default' on address(es): 127.0.0.1, ::1 with port: 12346.
YYYY-MM-DDTHH:MM:SS.261Z | INFO  | state-manager1            | DefaultStateManager            | Invoking cis-sso-settings-builder
YYYY-MM-DDTHH:MM:SS.433Z | INFO  | state-manager1            | CertificateUtil                | Creating anonymous SSO Admin Client for URI https://<IPaddress of VCenter>/sso-adminserver/sdk/vsphere.local
YYYY-MM-DDTHH:MM:SS.641Z | INFO  | state-manager1            | DefaultStateManager            | Invoking sts-builder
YYYY-MM-DDTHH:MM:SS.311Z | INFO  | shutdown-hook             | ApiEndpointServer              | Start shutting down...
YYYY-MM-DDTHH:MM:SS.312Z | INFO  | shutdown-hook             | DefaultStateManager            | shutdown
YYYY-MM-DDTHH:MM:SS.321Z | INFO  | shutdown-hook             | ApiEndpointServer              | Shutdown.

1. SSH to the affected vCenter with root

2. Check the hosts file

cat /etc/hosts

Example:

3. If the hosts file is similar to the above screenshot, edit the hosts file:

4. To enter insert mode, press the i key

5. Add the following line to the bottom of the file, where <IP address of the vCenter> is the affected vCenter's IP:

<IP address of the vCenter>  localhost 

Example:

6. Save the file by pressing the ESC key and entering:

7. Stop and start all vCenter services:

Impact/Risks:

Note: This change may be reverted during a patch or reboot

If the affected vCenter is standalone, take a valid snapshot of the vCenter Server.

If the affected vCenter is in ELM, take a power-off snapshot of all the vCenters.