Cannot access Plesk: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full

Created:

2016-11-16 13:08:53 UTC

Modified:

2017-08-08 13:18:28 UTC

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Cannot access Plesk: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full

Applicable to:

  • Plesk 12.5 for Windows

Symptoms

Plesk is not accessible with the following message is web browser:

ERROR: PleskMainDBException: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.
(Error code: 2002) (db.php:444)

Cause

TCP stack is not tuned to process high number of connections.

Resolution

  1. Create two parameters in Windows Registry:

    HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

    TcpTimedWaitDelay (DWORD) = 30

    MaxUserPort (DWORD) = 65534

  2. Reboot the server

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