fix the nullpointexception

ml_c_et_pe_preciseexposure_dimen_d_rt/src/main/java/com/gmei/function/DimRichAsyncFunction.java

@@ -108,7 +108,7 @@ public class DimRichAsyncFunction extends RichAsyncFunction<MlPreciseExposureBea
             DimPageType dimReferrerType = dimPageTypeCache.getValue(referrer_code, new DimTableCallable(referrer_code, DimTableList.DIM_PAGE_TYPE.getTableName(), dimJdbcUrl));
             if (dimReferrerType != null) {
                 if (dimReferrerType.getName() == null) {
-                    dimPageTypeCache.invalidate(page_code);
+                    dimPageTypeCache.invalidate(referrer_code);
                 } else {
                     mlPreciseExposureBean.setReferrer_name(dimReferrerType.getName());
                 }