Question

I have the following native routine:

void sendMessage(const char* text)
{
    JNIEnv* env;

    if(!_jvm)
        return;

    _jvm->AttachCurrentThread(&env, NULL);

    if(!_nativesCls)
        _nativesCls = env->FindClass("com/foo/BaseLib");
    if(_nativesCls == 0)
            return;

    jstring message = env->NewStringUTF(text);
    if(!_sendStr)
        _sendStr = env->GetStaticMethodID(_nativesCls, "onMessage", "(Ljava/lang/String;)V");
    if(_sendStr)
        env->CallStaticVoidMethod(_nativesCls, _sendStr, message);
    //env->ReleaseStringUTFChars(message, text); // <----- * NOT WORKING
}

If I run this as is, it works fine up until memory fills up and I receive:

ReferenceTable overflow (max=512)

I thought adding the commented line above would fix the issue but it just causes the app to bomb out at that point.

Any suggestions?

Answer 1

DeleteLocalRef(). Just like any other Java object that was allocated within JNI. However, it will be automatically garbage-collected once the JNI method returns. Details here: http://download.oracle.com/javase/1.3/docs/guide/jni/spec/design.doc.html#1242