We are getting Mds info by calling mds.serviceget(null, callback) on an mds object. That mds object has been obtained previously by Phd.getObjects() among other Dim objects.
We can see that serviceCompleted gets called with successful result.
We then issue mds.getConfigId() on that mds object expecting to get a config id.

However NullPointerException gets thrown.

In the stack trace we can see:

java.lang.NullPointerException
at com.oracle.phd.dim.MdsImpl.getConfigId(MdsImpl.java:129)