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Asked: 2026-05-22T20:04:38+00:00

Hy ppl, I’m having a problem trying to use Log4J’s NTEventLogAppender. I’ve set my

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Hy ppl,

I’m having a problem trying to use Log4J’s NTEventLogAppender.

I’ve set my Log4J properties like this:

log4j.rootLogger=DEBUG, CA, NTEventLog 


    #Console Appender 
    log4j.appender.CA=org.apache.log4j.ConsoleAppender 
    log4j.appender.CA.layout=org.apache.log4j.PatternLayout 
    log4j.appender.CA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n 

    #File Appender 
    log4j.appender.FA=org.apache.log4j.FileAppender 
    log4j.appender.FA.File=sample.log 
    log4j.appender.FA.layout=org.apache.log4j.PatternLayout 
    log4j.appender.FA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

    #Event Log Appender
    log4j.appender.NTEventLog=org.apache.log4j.nt.NTEventLogAppender
    log4j.appender.NTEventLog.source=ESB Web Services


    # Set the logger level of File Appender to WARN 
    log4j.appender.FA.Threshold = WARN

Following the advice here, I’ve placed NTEventLogAppender.amd64.dll file on my System32 Folder, but when I try to instance a class that uses a Logger I get this exception:

Exception in thread “main” java.lang.UnsatisfiedLinkError: NTEventLogAppender (Not found in java.library.path)

What’s wrong here?

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1 Answer

  1. Editorial Team

    This is to allow you to debug easily:

    If you did add the dll in the System32 folder, make sure that the directory is also included in Java’s library path java.library.path:

    To test (via code):

    System.out.println(System.getProperty("java.library.path"));

    Output (partial):

    C:\Program
    Files\Java\jdk1.6.0_21\bin;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program
    Files/Java/jre6/bin/client;C:/Program
    Files/Java/jre6/bin;C:\Program
    Files\Common Files\Microsoft
    Shared\Windows Live;C:\Program
    Files\Borland\Delphi7\Bin;C:\Program
    Files\Borland\Delphi7\Projects\Bpl\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program
    Files\Microsoft SQL
    Server\80\Tools\BINN;C:\Program
    Files\RemObjects
    Software\Everwood\Bin;C:\Program
    Files\RemObjects Software\RemObjects
    SDK for Delphi\Dcu\D7;C:\Program
    Files\Microsoft SQL
    Server\100\Tools\Binn\;C:\Program
    Files\Microsoft SQL
    Server\100\DTS\Binn\;C:\Program
    Files\Microsoft SQL
    Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program
    Files\Microsoft Visual Studio
    9.0\Common7\IDE\PrivateAssemblies\;C:\Program
    Files\Microsoft SQL
    Server\80\Tools\Binn\;c:\Program
    Files\Microsoft SQL
    Server\90\Tools\binn\;C:\Program
    Files\Embarcadero\Delphi
    Prism\bin;C:\Program Files\Developer
    Express.VCL\Library\Delphi14;C:\Program
    Files\QuickTime\QTSystem\;C:\Program
    Files\Developer
    Express.VCL\Library\Delphi7

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