Re: AttachCurrentThread() is getting MCH3601

Got the problem fixed. But I'm not understand why it has been working for
these years. It is currently running fine in production without my fixes.

below is what I did to fix it:
In the QSYSINC/QRPGLESRC/JNI copy book, there is a JavaVM field with base
pointer of JavaVM_P. Looking at the JDBCR4 coding, I see that scott is
setting this JavaVM_P with jvm pointer that it gets from calling
JNI_GetCreatedJavaVMs(). This is the one line of code that is missing in my
service program that calls attachCurrentThread. So, I added a line of code
to populate the JavaVM_P and, bam, it works.


"Hockchai Lim" <lim.hock-chai@xxxxxxxxxxxxxxx> wrote in message
news:mailman.2988.1310747834.2630.rpg400-l@xxxxxxxxxxxx...

I'm getting the MCH3601 when executing the AttachCurrentThread()
procedure. The service program that performs the execution has been
working fine (as far as I know) and I'm not sure why all the sudden I'm
getting this error. Can someone gives me some pointers on what could be
the cause of the problem? Below is the joblog and code snippet.

==> Relevant joblog
JAVA_HOME = /QOpenSys/QIBM/ProdData/JavaVM/jdk50/32bit.
Environment variable added.
QIBM_RPG_JAVA_PROPERTIES =
-Dorg.omg.CORBA.ORBClass=com.ibm.CORBA.iiop.ORB;.
Environment variable added.
Java Virtual Machine is IBM Technology for Java. PID(8251)
JVM properties were loaded from a properties file.
Pointer not set for location referenced.
Application error. MCH3601 unmonitored by QJVAJNI at statement
0000000001, instruction X'0000'.


Code snippet:
If (rc = 0
and nVMs > 0);
attachArgs = *ALLX'00';
attachArgs.version = JNI_VERSION_1_4 ;
Monitor;
rc = AttachCurrentThreadX (jvm_PTR(1) :
env_PTR : %addr(attachArgs));
On-Error;
rc = -1 ;
EndMon;
EndIf;

Below is the values for the params when in debug mode:
JVM_PTR(1) = SPP:E9F9E9F298009320
ENV_PTR = SPP:*NULL
ATTACHARGS.VERSION = 65540
ATTACHARGS.NAME = SPP:*NULL
ATTACHARGS.GROUP = 0