Events 1138 and 1139 are logged and contain incorrect data in the AD DS log

Applies to: Windows 8Windows 8 EnterpriseWindows 8 Pro


Consider the following scenario:
  • You are an Active Directory administrator of a domain controller that's running on a Windows Server 2012-based server.
  • The domain controller has Lightweight Directory Access Protocol (LDAP) Interface logging enabled.
  • You check for performance issues in the Active Directory Domain Services (AD DS) event log.

In this scenario, events 1138 and 1139 are logged, and the events contain incorrect data that resembles the following:

Internal event: Function %1 entered.%n
SID: %2%n
Source IP: %3%n
Operation identifier: %4%n
Data1: %5%n
Data2: %6%n
Data3: %7%n
Data4: %8%n
;// logging_level: 5 MessageId=1139
Internal event: Function %1 exited.%n
Elapsed time (ms): %2%n
SID: %3%n
Source IP: %4%n
Operation identifier: %5%n
Data1: %6%n
Data2: %7%n
Data3: %8%n
;// logging_level: 5


This problem occurs because of a bug that's triggered when parameters are passed to these event log entries.


Hotfix information

A supported hotfix is available from Microsoft Support. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, go to the following Microsoft website: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


There are no prerequisites for installing this hotfix.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


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