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OPERATIONAL DEFECT DATABASE
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A Client Error message will appear as you fail to connect to a horizon desktop:"VDPCONNECT_PEER_UNAVAILABLE: The connection encountered an unavailable peer. This could be because a peer computer, such as a proxy, was unable to handle the connection request. If the issue persists, please contact your system administrator."Horizon Client logs and Horizon MKS logs, with the latest cross-platform client release, contain a keyword Blast_Connect_Failure_Alert to aid in expedited failure diagnosis.Log Location: Location of Horizon (VDM) log files (1027744) vmware-mks-<pid>.log 2023-02-25T01:29:27.194Z In(05) blastSocket [BlastSocketClient] BlastSocketClientConnectFailureAlert: Could not connect to Desktop. 2023-02-25T01:29:27.194Z In(05)+ blastSocket Blast_Connect_Failure_Alert: Reason: VDPCONNECT_PEER_UNAVAILABLE (41) 2023-02-25T01:29:27.194Z In(05)+ blastSocket Blast_Connect_Failure_Alert: host:127.0.0.1 port: 8443 httpProxy:X.X.X.X:3128 fqdn:localhost 2023-02-25T01:29:27.194Z In(05)+ blastSocket Blast_Connect_Failure_Alert: error: 6 detailed: 0 httpStatus: 503 ClientContext:28E929D3ED0 vmware-horizon-viewclient-<nnn>.txt 2023-02-24T17:29:27.195-08:00 WARN (01) [libsdk] : RMKSWindow::OnConnectionStateChanged:2352: Blast_Connect_Failure_Alert: (281D199E9F0) disconnected with VDPCONNECT_PEER_UNAVAILABLE error: 'VDPCONNECT_PEER_UNAVAILABLE: The connection encountered an unavailable peer. This could be because a peer computer, such as a proxy, was unable to handle the connection request. If the issue persists, please contact your system administrator.'
The client encounters an HTTP 503 error while connecting to a peer. Please reference the following for a definition in terms of this error response code: 503 service unavailable
When attempting to establish a connection with another computer or network device, the user receives the error message "VDPCONNECT_PEER_UNAVAILABLE". This error message indicates that the connection encountered an unavailable peer, which could be due to network issues, firewalls, or proxies that are temporarily blocking the connection. If you encounter the "VDPCONNECT_PEER_UNAVAILABLE" error message when attempting to establish a connection, follow the steps below to troubleshoot and resolve the issue:Client Side - End User Perspective: Wait a few moments and try again if you typically have consistent access - it may be a transient issue.Can you reach the address configured for your horizon client via a Browser?Restart your network device or computer: Try restarting your network device or computer and attempting the connection again.Contact your system administrator: If the issue persists, it is recommended that you contact your system administrator for further assistance in troubleshooting the issue. Your system administrator can help you determine the root cause of the issue and provide guidance on how to resolve it. Troubleshooting Steps for a Horizon Administrator: Check your network settings: Ensure that your network settings are configured correctly and that your device or endpoint firewall or proxies are not blocking the connection.Verify event logs on appropriate devices in the chain to ensure general health and that no systems involved are under load.
This is a child article of Enhanced Horizon Blast Error Codes with Horizon Client 2303 and Later (91013)