Site shows: 500.19 - Internal Server Error, Config Error - Lock violation

[Suhitha]

Question: Site shows: 500.19 - Internal Server Error, Config Error - Lock violation


Applicable to:

• Plesk for Windows

Symptoms

• Website is showing error:

Code Select Expand

HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.
Detailed Error Information
Module IIS Web Core
Notification BeginRequest
Handler Not yet determined
Error Code 0x80070021
Config Error Lock violation
Config File \\?\C:\Inetpub\vhosts\example.com\web.config


• The following error can be found if Failed Request Tracing is enabled:

Code Select Expand

ModuleName
IIS Web Core
Notification 1
HttpStatus 500
HttpReason Internal Server Error
HttpSubStatus 19
ErrorCode 2147942433
ConfigExceptionInfo \\?\C:\Inetpub\vhosts\example.com\httpdocs\web.config (80) :Lock violation
Notification BEGIN_REQUEST
ErrorCode The process cannot access the file because another process has locked a portion of the file.
(0x80070021)

• Prohibit the ability to override handlers via web.config is enabled in Tools & Settings > Security Policy.

Cause

Prohibit the ability to override handlers via web.config blocks attempts to set custom handlers in web.config.


Resolution

Apply one of the following solutions:

• Change the default Security Policy on the server

1.Log into Plesk

2.Untick Prohibit the ability to override handlers via web.config in Plesk > Tools & Settings > Security

In case the issue is still present, apply the following steps

1.Connect to the server via RDP

2.Repair the configuration:

c:\> plesk repair web example.com

3.Create backup of C:\windows\system32\inetsrv\config\applicationHost.config and open it with a text editor

4.Remove lockElements="" from the <handlers> section of the affected website

• Modify the web.config of the affected server:

1.Log into Plesk

2.Navigate to Domains > example.com > File Manager and open the web.config file for editing

3.Remove the <handlers> section from the file and save it

Note: The section may differ. The initial error will point at the line that holds the offending configuration: \\?\C:\Inetpub\vhosts\example.com\httpdocs\web.config (80)