j9 vm crash on windows, not on linux

Question

Hi all, An eclipse plugin for IBM RSM launches a java process to make some computations (realized in C/C++ via JNI). The problem here is when the process is started, it crashes...but only on windows. Moreover, if the process is started using Oracle/Sun jvm, it works fine.

Under linux, java -version gives

java version "1.6.0"
Java(TM) SE Runtime Environment (build pxi3260sr7-20091215_02(SR7))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux x86-32 jvmxi3260sr7-20091214_49398 (JIT   enabled, AOT enabled)
J9VM - 20091214_049398
JIT  - r9_20091123_13891
GC   - 20091111_AA)
JCL  - 20091202_01

and under windows:

java version "1.6.0"
Java(TM) SE Runtime Environment (build pwi3260sr7ifix-20100202_01(SR7+IZ67488))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Windows XP x86-32 jvmwi3260sr7-20091125_47905  (JIT enabled, AOT enabled)
J9VM - 20091125_047905
JIT  - r9_20091123_13891
GC   - 20091111_AA)
JCL  - 20100202_01 

My question here:

Anyone knows what are the differences between these two jvm, and eventually could tell me the reasons of this crash ? Is there a bug to report to IBM ?

I can post a dump of the crash if necessary

EDIT: After some work, we have replaced JNI by JNA, and everything works fine...

Answer 1

Can you post the dump and your interface code?

I think examining your JNI code will help you figure out what's going on; J9 is brittle to begin with, JNI is most likely destabilizing it somehow.