java.lang.UnsatisfiedLinkError - when running z/OS application

Question

When I am trying to run one of my Java application (which is deployed in IBM Websphere App server), I am getting the below error,

java.lang.UnsatisfiedLinkError: PATH/file.so (EDC5253S An AMODE64 application is attempting to load an AMODE31 DLL load module. (errno2= some_address )) at java.lang.ClassLoader.loadLibraryWithPath(ClassLoader.java:1344)

Did anyone face the same issue of AMODE64 ?

Or could someone provide info on how to compile code to AMODE64.

Any reference in this would also be of great help.

Thanks in advance.

Answer 1

You asked for info on how to compile code in 64-bt mode, but typically, as the end-user, you would not be the one to do that, the provider of the native library/dll would do that because you need the source code. You replaced the file name of the library in the error message above with PATH/file.so, so I can't provide you any guidance on who the provider of that library might be. Using the name of the library, search for for the provider and then ask them for a version of the library compiled in 64-bit mode. On the outside chance you own the code for the library, see this IBM KnowledgeCenter topic for information on how to compile and bind code in 64-bit mode.

Answer 2

On z/OS, you can't have a mixed single-address application that has some parts compiled 31-bit and some parts compiled 64-bit, if you are using Language Environment. All modern high level languages -do- use Language Environment (eg C, C++, Java, COBOL, PL/I), and so this is what is causing your problem. Depending on the version of Java you are using, you can either switch to a 31-bit JVM or (preferably) recompile and relink your C DLLs as 64-bit.