If some services have been terminated, run all services with the command: If there is an external Platform Service Controller (PSC), check vCenter connection to the PSC.Connect to vCenter via SSH, or connect to the VCSA console (Press Alt+F1 in the DCUI of vCenter, log in, type shell, and press Enter).Ĭheck the status of vCenter services by running the command on the machine running vCenter:.As an alternative, you can enable Bash Shell and SSH access in the DCUI (Direct Console User Interface) of vCenter Server Appliance (VCSA) in the Troubleshooting Mode options.Įnsure that there is a connection between your computer and vCenter server by running the command from your computer (enter the host name or IP address of your vCenter):.Enable SSH login, console CLI, and Bash Shell in the Access section of the vCenter Appliance Management Interface. You can check the status of vCenter services in the console and the command line interface (CLI).For example, if the vSphere Web Client service is Started, and the vCenter Server service is Stopped, the VMware 503 Service Unavailable error can occur. Check the status of vCenter services in the Services section.Open the Appliance Management Interface (for vCenter Server Appliance) in a web browser by entering the IP address or the FQDN (a Fully Qualified Domain Name) for vCenter and port 5480, for example:.If this doesn’t help, check whether all needed services have started. Try connecting to vCenter from another client.If you have just started a vCenter instance, and all the needed services have not started yet, wait for a few minutes and try again. You should find and fix the error on the vCenter server and not on the client side. Incorrect firewall settings (for vCenter installed on Windows) and network issues.There are issues with a database used by vCenter.Some services have not loaded yet and are not running (one of the common issues is that the reverse Proxy service or the vSphere web client service is down).In the case of the vCenter 503 Service Unavailable error, the error can be caused by different factors: Here’s the full text of this error for VMware vSphere Client:ĥ03 Service Unavailable (Failed to connect to endpoint: _serverNamespace = / action = Allow _pipeName =/var/run/vmware/vpxd-webserver-pipe) Usually this error indicates that a server cannot handle a request and you should look for the issue on the web server hosting an application. Based on this, 503 Service Unavailable is a response that describes a server-side error. The 5xx class of HTTP status codes is used to notify users about server errors. DISCOVER SOLUTION What is “503 service unavailable” error?ĥ03 Service Unavailable is one of the standard HTTP status codes that are returned by a server when a client sends a request to the server.
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