The description field in the mbean info object for some of the mbeans is null.

The mbeaninfo equals() method does not check this field. It just does this...

if (this.getDescription().equals(other.getDescription()) == false)
return false;

Unfortunately, when description equals null, this generates a null pointer exception. There should be a check for null too.

The comparison should be:

if ((getDescription() != null) && (getDescription().equals(other.getDescription()) == false))
return false;
if ((getDescription() == null) && (other.getDescription() != null))
return false;

Henry