Plesk is not accessible: HTTP Error 503. The service is unavailable.

Created:

2016-11-16 12:58:43 UTC

Modified:

2017-06-05 05:32:32 UTC

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Plesk is not accessible: HTTP Error 503. The service is unavailable.

Applicable to:

  • Plesk 12.5 for Windows

Symptoms

  • Plesk is not accessible with ythe following error:

    HTTP Error 503. The service is unavailable.
    

PleskControlPanel application pool permanently goes down with the following errors in Event Viewer:

  • Web Server (IIS) Event ID 5057 contains the following:

    Application pool PleskControlPanel has been disabled. Windows Process Activation Service (WAS) did not create a worker process to serve the application pool because the application pool identity is invalid.
    
  • Security Audit event with ID 4625 has contents like:

    An account failed to log on.
    
    Subject:
        Security ID:        SYSTEM
        Account Name:       SOMENAME$
        Account Domain:     SOMEGRP
        Logon ID:       0x3E7
    
    Logon Type:         4
    
    Account For Which Logon Failed:
        Security ID:        NULL SID
        Account Name:       psaadm
        Account Domain:     SOMEGRP
    
    Failure Information:
        Failure Reason:     The user has not been granted the requested logon type at this machine.
    

Cause

psaadm user does not have necessary rights.

Resolution

  1. Open Local Group Policy Editor via gpedit.msc
  2. Go to Local Computer Policy > Computer Configuration > Security Settings > Local Policies > User Rights Assignment
  3. Ensure that Everyone group is not listed in 'Deny log on as a batch job.'
  4. Ensure that psaadm user is listed in 'Logon as Batch Job' policy
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