UnsatisfiedLinkError while using JNI
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hello, I am using JNI to load a library which I use for a Web Service running on a Tomcat5.5-Server using Axis. My problem is that when I call a native function it immediatly fails with java.lang.UnsatisfiedLinkError: new_ParticleSocket__SWIG_0 ( new_ParticleSocket__SWIG_0 being the function called ). No further information is provided by the exception. After checking the obvious ( classpath and java.library.path/LD_LIBRARY_PATH, also checked if the library was loaded twice ) I checked the library itself ( which is generated by SWIG 1.3.29 ) using nm to see if all symbols were generated correctly ( which they were, the symbols are all in the form Java_edu_teco_particles_libParticle_libparticleJNI_* and in a standalone form without the prefix). I then used LD_DEBUG=all to check if the library was indeed loaded. There I found that the library was loaded however when JNI searches for the necessary function it does not search the newly loaded library. ( A lookup is performed on all libraries loaded before but not on the new library ) I am using Debian GNU/Linux with Sun JDK 1.5.08 Any help would be appreciated - Daniel Wildschut -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFFX3dDUS3Mvw9vkgURArBYAJ9HFskU8O8jSXvBibCA0X+mqv4FPwCbBIDk jRUTnbGR1+t+ejlH9OLCoTk= =VkIX -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: UnsatisfiedLinkError while using JNI
the entries in the LD_LIBRARY_PATH must be colon separated if your setting thru bash make sure you export LD_LIBRARY_PATH If none that works take a look at these LD_LIBRARY_PATH diagnostics http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html M- This e-mail communication and any attachments may contain confidential and privileged information for the use of the designated recipients named above. If you are not the intended recipient, you are hereby notified that you have received this communication in error and that any review, disclosure, dissemination, distribution or copying of it or its contents - Original Message - From: Daniel Wildschut [EMAIL PROTECTED] To: users@tomcat.apache.org Sent: Saturday, November 18, 2006 4:12 PM Subject: UnsatisfiedLinkError while using JNI -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hello, I am using JNI to load a library which I use for a Web Service running on a Tomcat5.5-Server using Axis. My problem is that when I call a native function it immediatly fails with java.lang.UnsatisfiedLinkError: new_ParticleSocket__SWIG_0 ( new_ParticleSocket__SWIG_0 being the function called ). No further information is provided by the exception. After checking the obvious ( classpath and java.library.path/LD_LIBRARY_PATH, also checked if the library was loaded twice ) I checked the library itself ( which is generated by SWIG 1.3.29 ) using nm to see if all symbols were generated correctly ( which they were, the symbols are all in the form Java_edu_teco_particles_libParticle_libparticleJNI_* and in a standalone form without the prefix). I then used LD_DEBUG=all to check if the library was indeed loaded. There I found that the library was loaded however when JNI searches for the necessary function it does not search the newly loaded library. ( A lookup is performed on all libraries loaded before but not on the new library ) I am using Debian GNU/Linux with Sun JDK 1.5.08 Any help would be appreciated - Daniel Wildschut -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFFX3dDUS3Mvw9vkgURArBYAJ9HFskU8O8jSXvBibCA0X+mqv4FPwCbBIDk jRUTnbGR1+t+ejlH9OLCoTk= =VkIX -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: UnsatisfiedLinkError while using JNI
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hello, the library itself is found and loaded ( at least according to LD_DEBUG=all ), also if the library is not in the LD_LIBRARY_PATH I get a different error ( the runtime telling me the library could not be loaded). - - Daniel Wildschut Martin Gainty wrote: the entries in the LD_LIBRARY_PATH must be colon separated if your setting thru bash make sure you export LD_LIBRARY_PATH If none that works take a look at these LD_LIBRARY_PATH diagnostics http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html M- This e-mail communication and any attachments may contain confidential and privileged information for the use of the designated recipients named above. If you are not the intended recipient, you are hereby notified that you have received this communication in error and that any review, disclosure, dissemination, distribution or copying of it or its contents - Original Message - From: Daniel Wildschut [EMAIL PROTECTED] To: users@tomcat.apache.org Sent: Saturday, November 18, 2006 4:12 PM Subject: UnsatisfiedLinkError while using JNI Hello, I am using JNI to load a library which I use for a Web Service running on a Tomcat5.5-Server using Axis. My problem is that when I call a native function it immediatly fails with java.lang.UnsatisfiedLinkError: new_ParticleSocket__SWIG_0 ( new_ParticleSocket__SWIG_0 being the function called ). No further information is provided by the exception. After checking the obvious ( classpath and java.library.path/LD_LIBRARY_PATH, also checked if the library was loaded twice ) I checked the library itself ( which is generated by SWIG 1.3.29 ) using nm to see if all symbols were generated correctly ( which they were, the symbols are all in the form Java_edu_teco_particles_libParticle_libparticleJNI_* and in a standalone form without the prefix). I then used LD_DEBUG=all to check if the library was indeed loaded. There I found that the library was loaded however when JNI searches for the necessary function it does not search the newly loaded library. ( A lookup is performed on all libraries loaded before but not on the new library ) I am using Debian GNU/Linux with Sun JDK 1.5.08 Any help would be appreciated - Daniel Wildschut - - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFFX39wUS3Mvw9vkgURAixpAKCh2kMLolGaGQjSbNhSHmSVYSLNbQCgzDsk 2WUnnKZboeY2/o+mTiXHudc= =K55o -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: UnsatisfiedLinkError while using JNI
From: Daniel Wildschut [mailto:[EMAIL PROTECTED] Subject: UnsatisfiedLinkError while using JNI I then used LD_DEBUG=all to check if the library was indeed loaded. There I found that the library was loaded however when JNI searches for the necessary function it does not search the newly loaded library. This may be a classloader conflict. What triggers the loading of the native library? If this is done under a classloader that's not in the same branch of the tree that's now making the reference to the native method, it may not be able to find it. Look at: http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html for Tomcat classloading info. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: UnsatisfiedLinkError while using JNI
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hello, I checked the classloader and indeed the problem was a classloader conflict ( the imported classes used the System-default ClassLoader, which lead to the problem ). I was able to place the call to LoadLibrary into a separate class which I put into the classpath. This solved the problem. Thank you for your time advice - - Daniel Wildschut Caldarale, Charles R wrote: From: Daniel Wildschut [mailto:[EMAIL PROTECTED] Subject: UnsatisfiedLinkError while using JNI I then used LD_DEBUG=all to check if the library was indeed loaded. There I found that the library was loaded however when JNI searches for the necessary function it does not search the newly loaded library. This may be a classloader conflict. What triggers the loading of the native library? If this is done under a classloader that's not in the same branch of the tree that's now making the reference to the native method, it may not be able to find it. Look at: http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html for Tomcat classloading info. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFFX5auUS3Mvw9vkgURAolnAJ9g/TckEBJCaiSz7s4nS0lfDMBvZgCfdUUB aSL3e87jRRe9Av8L7WmFCKw= =Dt97 -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
using JNI
Hi, I have a DLL that I need to use from some of my servlets. Where should I put the DLL? How do I load the DLL from all those servlets (should it be loaded only once?)? Is there anywhere I can read about this? Thanks, Zohar. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
