Excpetion while calling NewObjectArray 2 times

Question

I am calling a C++ method from another C++ code 2 times. First time, it works ok but second time, JVM throws an exception and terminates. Any idea ? It throws an exception while calling
_env->NewObjectArray 
I have posted relavant portion of my method
# An unexpected error has been detected by HotSpot Virtual Machine:
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6d739bf5, pid=3592, tid=2888
# Java VM: Java HotSpot(TM) Client VM (1.5.0_02-b09 mixed mode)
# Problematic frame:
# V [jvm.dll+0x89bf5]
# An error report file with more information is saved as hs_err_pid3592.log
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
jclass cls;
     jmethodID mid;
     jstring domainString;
     jstring userLogonNameString;
     jstring userCommonNameString;
     jstring userDisplayNameString;
     jstring userDescriptionString;
     domainString = _env->NewStringUTF(domain);
     userLogonNameString = _env->NewStringUTF(userLogonName);
     userCommonNameString = _env->NewStringUTF(userCommonName);
     userDisplayNameString = _env->NewStringUTF(userDisplayName);
     userDescriptionString = _env->NewStringUTF(userDescription);
     printf("After NewStringUTF\n");
     cls=_env->GetObjectClass(_obj);
printf("After GetObjectClass\n");
printf("Number of Members %d\n",noOfMembers);
     jobjectArray ret;
     if (noOfMembers > 0)
     ret=(jobjectArray)_env->NewObjectArray(noOfMembers,
_env->FindClass ("java/lang/String"),
_env->NewStringUTF(""));
     printf("After NewObjectArray\n");
     for(int i=0;i<noOfMembers;i++) {
     jstring jStr = _env->NewStringUTF(memberOfArr);
     _env->SetObjectArrayElement(ret,i,jStr);
     _env->DeleteLocalRef(jStr);
     mid=_env->GetMethodID(cls, "updateModel",
               "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;)V");
     if (mid == 0) {
     printf("%s\n","Can't find method updateModel");
     return ;
     _env->ExceptionClear();
     _env->CallVoidMethod(_obj, mid,domainString,userLogonNameString,userCommonNameString,userDisplayNameString,userDescriptionString,ret);
     _env->DeleteLocalRef(domainString);
     _env->DeleteLocalRef(userLogonNameString);
     _env->DeleteLocalRef(userCommonNameString);
     _env->DeleteLocalRef(userDisplayNameString);
     _env->DeleteLocalRef(userDescriptionString);
     _env->DeleteLocalRef(ret);

Answer 1

Seems like after calling a java method from a native code using JNIEnv*, it is not reusable. How can i achieve my goal ?By keeping instead another structure as a class variable: JavaVM*.
With that variable you can retrieve JNIEnv* in each C++ method you need it.
Suppose you want to use JNIEnv* in SomeCppClass::someCppMethod() method:class SomeCppClass {
private:
    JavaVM * jvm;
public:
    SomeCppClass();
    ~SomeCppClass();
    void someCppMethod();
SomeCppClass::SomeCppClass() : jvm(NULL) {
    JavaVMInitArgs vm_args;
    JNIEnv * env;
    if (JNI_CreateJavaVM(&jvm, (void **)&env, &vm_args) != 0) {
        // some error handling
SomeCppClass::~SomeCppClass() {
    if (jvm != NULL) {
        jvm->DetachCurrentThread();
        jvm->DestroyJavaVM();
    jvm = NULL;
void SomeCppClass::someCppMethod() {
    JNIEnv * env;
    if (jvm->AttachCurrentThread((void **)&env, NULL) < 0) {
        // some error handling
}Regards