RE: JNI with AXIS - InvocationTargetException

["Martin, Richard" <rm...@essex.ac.uk>]

Hi Sai,
 
I'm not sure what container you are running Axis in. However there is an
entry in the Tomcat 5.0 release notes relating to JNI with tomcat:
http://jakarta.apache.org/tomcat/tomcat-5.0-doc/RELEASE-NOTES.txt
 
The following is copied verbatim:
 
-------------------------------------
Tomcat 5.0 and JNI Based Applications:
-------------------------------------

Applications that require native libraries must ensure that the
libraries have
been loaded prior to use.  Typically, this is done with a call like:

  static {
    System.loadLibrary("path-to-library-file");
  }

in some class.  However, the application must also ensure that the
library is
not loaded more than once.  If the above code were placed in a class
inside
the web application (i.e. under /WEB-INF/classes or /WEB-INF/lib), and
the
application were reloaded, the loadLibrary() call would be attempted a
second
time.

To avoid this problem, place classes that load native libraries outside
of the
web application, and ensure that the loadLibrary() call is executed only
once
during the lifetime of a particular JVM.
 
-------------------------------------
 
 
I'm not sure whether this has any relevance to your container but I
remember reading that there was a similar problem with Tomcat 4.x series
of applications, and it looks like the steps listed above might be true
of other servlet containers as well.
 
Hope this helps,
 
Richard


	-----Original Message-----
	From: Sai Pradeep - Hotmail [mailto:pradeep_sai@hotmail.com] 
	Sent: 13 January 2004 00:42
	To: axis-user@ws.apache.org
	Subject: JNI with AXIS - InvocationTargetException
	
	
	Hi All!
	 
	I came to know from the mailing list that many people used Jni
with Axis. My task was to develop a web service which can invoke a JNI.
Whenever I try to invoke jni from my service I get an Exception
"InvocationTargetException". When i try to run this jni application
without deploying it on the Axis, everything seems to work fine. I would
be grateful to you, if anyone of you could be able to get me out of this
Exception.
	 
	Cheers
	Sai.