Application pool crashes frequently: Exception code: 0xc0000374


2016-11-16 12:57:25 UTC


2017-08-21 06:16:41 UTC


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Application pool crashes frequently: Exception code: 0xc0000374

Applicable to:

  • Plesk 11.x for Windows
  • Plesk 12.0 for Windows
  • Plesk 12.5 for Windows


Domains application pools crash frequently with corresponding messages in Windows Event Viewer:

Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7a5f8
Faulting module name: ntdll.dll, version: 6.1.7601.17725, time stamp: 0x4ec49b8f
Exception code: 0xc0000374
Fault offset: 0x000ce6c3
Faulting process id: 0xca4
Faulting application start time: 0x01cff41fe8531644
Faulting application path: C:\\Windows\\SysWOW64\\inetsrv\\w3wp.exe
Faulting module path: C:\\Windows\\SysWOW64\

tdll.dll Report Id: 532649c8-6018-11e4-aa0d-8348922f9379


Issue is related to ntdll.dll file, exception code 0xc0000374 means heap corruption.


Apply solutions item by item and move to the next one only if previous step did not help:

  • Run Windows the System File Checker tool to repair corrupted .dll or replace it with one from test environment.

  • Review application pool performance and try to tweak it by increasing corresponding values in machine.config , refer to

  • If previous steps did not help, it is recommended to install DebugDiag tool . Then use the guide to create a Crash Dump and contact Microsoft Support for its analyzing, because this is a Windows operation system specific error and is not related to Plesk.

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