When defining the counter monitor, the threshold, offset and modulus
must be of the same type (either Integer or Long or Short or Byte).

It seems that the type is no more checked as no more THRESHOLD_ERROR
notifications are emitted when counter monitor attributes have different
types (only the min and max values seems to be checked).

The javadoc explicitly says:
public static final java.lang.String THRESHOLD_ERROR
    Notification type denoting that the type of the thresholds, offset or modulus is not correct. This notification is fired by counter and gauge monitors.
    The value of this notification type is jmx.monitor.error.threshold.

Same problem with gauge monitor.

###@###.### 2004-02-19