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| hilltops |
 Posted: Thu Apr 20, 2006 6:35 am Post subject: The libraries libmqjbnd05.so or mqjbnd05 can't be located |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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I have got difficulties getting my installation of MQ to locate the library libmqjbnd05.so. I have tried some of the solution recommended on this site.
I started with MQ version 5.3 CSD10 on Linux and using a JMS application try to connect to the queue manager. I get the following exception;
Exception in thread "main" java.lang.UnsatisfiedLinkError: no mqjbnd05 in java.library.path
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
I have set the env variable LD_LIBRARY_PATH=/opt/mqm/java/lib/
I upgraded my MQ to Version 6.0.0.0 but still got similar problems
I am running a 64-bit JVM. The thrust of previous postings on this subject seems to suggest that there is a conflict in the 64-bit classloader loading 32 bit libraries. Is that correct? Is there a definitive solution/fix/workaround to this problem for Versions 5.3 and 6.0.
Thankx in anticipation of your responses. |
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| jefflowrey |
| Posted: Thu Apr 20, 2006 6:39 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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LD_LIBRARY_PATH should work.
If it doesn't, adding "-D java.library.path=/opt/mqm/java/lib" to your startup should work.
_________________
I am *not* the model of the modern major general. |
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| hilltops |
| Posted: Thu Apr 20, 2006 8:24 am Post subject: |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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Still does not work with the env variable set:
This proves the vairable is set:
echo $LD_LIBRARY_PATH
/opt/mqm/java/lib/
and I run the application as follows;
java -Djava.library.path=/opt/mqm/java/lib -jar mqtest.jar "My Test Message"
I get the exception;
Exception in thread "main" java.lang.UnsatisfiedLinkError: /opt/mqm/java/lib/libmqjbnd05.so: /opt/mqm/java/lib/libmqjbnd05.so: cannot open shared object file: No such file or directory
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
Do I need to put some sym link somewhere?
Thankx |
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| mvic |
| Posted: Thu Apr 20, 2006 8:26 am Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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What is the output from
| Code: |
| ls -l /opt/mqm/java/lib/libmqjbnd05.so |
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| hilltops |
| Posted: Thu Apr 20, 2006 8:38 am Post subject: |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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this is the output of ls -l /opt/mqm/java/lib/libmqjbnd05.so
-r-xr-xr-x 1 mqm mqm 93466 2005-05-19 22:09 /opt/mqm/java/lib/libmqjbnd05.so |
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| mvic |
| Posted: Thu Apr 20, 2006 8:50 am Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| hilltops wrote: |
this is the output of ls -l /opt/mqm/java/lib/libmqjbnd05.so
-r-xr-xr-x 1 mqm mqm 93466 2005-05-19 22:09 /opt/mqm/java/lib/libmqjbnd05.so |
Thanks. I think the answer is in your first post; if this JVM is a 64-bit process, it will not be able to load a 32-bit shared library. I'm assuming that libmqjbnd05.so is a 32-bit library, but maybe
| Code: |
| file /opt/mqm/java/lib/libmqjbnd05.so |
will say for sure.
Now, this doesn't explain why the error message written by the JVM was "cannot open shared object file: No such file or directory"  |
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| hilltops |
| Posted: Thu Apr 20, 2006 9:02 am Post subject: |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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Yes, I have got a 32-bit version of MQ Version 6 as implied by /opt/mqm/lib.
64-bit would be in /opt/mqm/lib64. |
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| mvic |
| Posted: Thu Apr 20, 2006 9:13 am Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| hilltops wrote: |
Yes, I have got a 32-bit version of MQ Version 6 as implied by /opt/mqm/lib.
64-bit would be in /opt/mqm/lib64. |
I think you are probably right, but NB. /opt/mqm/java/lib is neither /opt/mqm/lib nor /opt/mqm/lib64. What do you get from the "file" command, out of interest? |
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| mvic |
| Posted: Thu Apr 20, 2006 9:20 am Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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I just verified the point at http://www.ibm.com/developerworks/eserver/library/es-JNI_AIX_PAPER.html with a little help from Google. (I've emphasized the most important bit).
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| Trying to load a 64-bit shared library into a 32-bit JVM process address space, or vice versa, will also most likely result in java.lang.UnsatisfiedLinkError. There is no way to load a 64-bit object into a 32-bit process space, or vice versa. The linker appropriately selects objects from the library based on the type of linking that is requested (32-bit or 64-bit), and creates an object or application of that type. |
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| hilltops |
| Posted: Fri Apr 21, 2006 2:02 am Post subject: |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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I changed my JVM to a 32-bit version and resolved the problems.
Thankx everyone for your suggestions. |
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