C main pgm creates too many local refs

Question

Okay I give up ... I have a main program in C which calls methods in a helper class to read and write JMS queues. Right now it is leaking a local reference somewhere in the routine below, and I can't figure out where. Each time it calls this routine it seems to create one local reference which is not freed, eventually resulting in lots of "JNI local ref creation exceeded capacity" messages. (I assume that the local references are not cleaned up automatically because my main() function is in C rather than Java ... I haven't seen this addressed anywhere though.)
Anyway, the routine attached below is what my program calls each time through its loop. There is nothing on the queue for this test, so the return value of the method is always NULL.
Any help would be appreciated ...
Roy Goodman
Code follows ...
static JNIEnv *env;
#define CHECK_EXCEPTION() \
    if ((*env)->ExceptionOccurred(env)) { \
          (*env)->ExceptionDescribe(env); \
          logError( "Java exception encountered - see log file" ); \
          (*env)->ExceptionClear(env); \
          return JAVA_EXCEPTION; \
int receiveWait( const char *queueName, const char *url, int wait, ppMsg msg )
  static jmethodID mid;
  static jclass cls = NULL;
  jstring receivedMsg;
  jstring jQueueName;
  jstring jUrl;
  const char *tmp;
  if ( env == NULL )
    return JAVA_EXCEPTION;
  if ( cls == NULL )
    jclass lCls = NULL;
    lCls = ( *env )->FindClass( env, QUEUE_HELPER );
    CHECK_EXCEPTION(  );
    cls = ( *env )->NewGlobalRef( env, lCls );
    ( *env )->DeleteLocalRef( env, lCls );
    mid = ( *env )->GetStaticMethodID( env, cls, "receive",
                           "(Ljava/lang/String;Ljava/lang/String;I)Ljava/lang/String;" );
    CHECK_EXCEPTION(  );
  jQueueName = ( *env )->NewStringUTF( env, queueName );
  jUrl = ( *env )->NewStringUTF( env, url );
  receivedMsg =
    ( *env )->CallStaticObjectMethod( env, cls, mid, jQueueName, jUrl,
                          ( jint ) wait );
  ( *env )->DeleteLocalRef( env, jQueueName );
  ( *env )->DeleteLocalRef( env, jUrl );
  CHECK_EXCEPTION(  );
  if ( receivedMsg != NULL )
    int len = ( *env )->GetStringUTFLength( env, receivedMsg );
    tmp = ( *env )->GetStringUTFChars( env, receivedMsg, 0 );
    if ( tmp != NULL && *tmp != '\0' )
      *msg = malloc( len+1 );
      memcpy( *msg, tmp, len+1 );
    else
      *msg = NULL;
  else
    *msg = NULL;
  if ( receivedMsg != NULL )
    ( *env )->ReleaseStringUTFChars( env, receivedMsg, tmp );
  ( *env )->DeleteLocalRef( env, receivedMsg );
  return OK;
}

Answer 1

After further investigation, it seems that the references are being created to the QUEUE_HELPER class. Could this be a problem in CallStaticObjectMethod() where it creates a local reference that it doesn't delete?
Thanks again,
Roy Goodman