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sqljdbc_auth.dll already loaded in another classloader [message #1007532]

Wed, 06 February 2013 10:46

Ville Kaukonen

Messages: 19
Registered: January 2011

Junior Member

com.microsoft.sqlserver.jdbc.AuthenticationJNI <clinit>
WARNING: Failed to load the sqljdbc_auth.dll cause : Native Library C:\apache-to
mcat-7.0.35\bin\sqljdbc_auth.dll already loaded in another classloader

I placed the files according to this http://stackoverflow.com/questions/10637585/native-library-sqljdbc-auth-dll-already-loaded-in-another-classloader

And I no longer had the issue I posted few days ago. Now I get error above and I'm very lost with the solution.

This suggests that I need to add the jar to shared lib and to have PATH variable to the dll http://wiki.apache.org/tomcat/HowTo#I.27m_encountering_classloader_problems_when_using_JNI_under_Tomcat

It did not solve issue either.

Viewer Version : 4.2.1
Engine Version: 4.2.1
JRE version: 1.7.0_13
apache-tomcat-7.0.35

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Re: sqljdbc_auth.dll already loaded in another classloader [message #1007630 is a reply to message #1007532]

Wed, 06 February 2013 19:30

Michael Williams

Messages: 1925
Registered: July 2009

Senior Member

Have you seen this page? It has some info about that error.

blogs.msdn.com - JDBC Blog

Michael

Developer Evangelist, Silanis

[Updated on: Wed, 06 February 2013 19:31]

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Re: sqljdbc_auth.dll already loaded in another classloader [message #1007921 is a reply to message #1007630]

Fri, 08 February 2013 08:25

Ville Kaukonen

Messages: 19
Registered: January 2011

Junior Member

Hello,
Thanks for answering.

I tried a few thing mentioned on that page. I moved the sql_auth to new location. Also made sure there is only one versio of it and the driver in the machine.

After defining -Djava.library.path=C:\SharedDLL\

INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\SharedDLL

I moved sqljdbc4.jar to Birts Lib folder hoping that nothing else would load it.

Still get

WARNING: Failed to load the sqljdbc_auth.dll cause : Native Library C:\SharedDLL
\sqljdbc_auth.dll already loaded in another classloader

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