output: #fixed code
                                  @Override
      protected CommandLine processOptions(ObjectInspector[] argOIs) throws UDFArgumentException {
          CommandLine cl = super.processOptions(argOIs);
          if(cl == null) {
              this.eta0 = 0.1f;
              this.eps = 1.f;
              this.scaling = 100f;
          } else {
              this.eta0 = Primitives.parseFloat(cl.getOptionValue("eta0"), 0.1f);
              this.eps = Primitives.parseFloat(cl.getOptionValue("eps"), 1.f);
              this.scaling = Primitives.parseFloat(cl.getOptionValue("scale"), 100f);
          }
          return cl;
      }
input: #vulnerable code 
                                  @Override
      protected CommandLine processOptions(ObjectInspector[] argOIs) throws UDFArgumentException {
          CommandLine cl = super.processOptions(argOIs);
          this.eta0 = Primitives.parseFloat(cl.getOptionValue("eta0"), 0.1f);
          this.eps = Primitives.parseFloat(cl.getOptionValue("eps"), 1.f);
          this.scaling = Primitives.parseFloat(cl.getOptionValue("scale"), 100f);
          return cl;
      } 
                              #location 4 
                              #vulnerability type NULL_DEREFERENCE