code: protected void connectionErrorOccurred() {
          if (tc.isEntryEnabled()) {
              Tr.entry(this, tc, "connectionErrorOccurred");
          }
          connectionErrorOccurred(null);
          if (tc.isEntryEnabled()) {
              Tr.exit(this, tc, "connectionErrorOccurred");
          }
      }
docs: /*
  This method is called by the connectionEventListener when a connection error occurs.
  This is method will, when possible, and as much as possible, initiate cleanup of all
  stuff associated with this MCWrapper.