增加排查日志

ad-engine-service/src/main/java/com/tzld/piaoquan/ad/engine/service/remote/FeatureV2RemoteService.java

@@ -24,9 +24,17 @@ public class FeatureV2RemoteService {
 
     public Map<String, String> getFeature(List<FeatureKeyProto> protos) {
         if (CollectionUtils.isEmpty(protos)) {
+            log.debug("FeatureV2RemoteService.getFeature: protos is empty");
+            return Collections.emptyMap();
+        }
+        try {
+            Map<String, String> result = client.multiGetFeature(protos);
+            log.debug("FeatureV2RemoteService.getFeature: protos.size={}, result.size={}", protos.size(), result != null ? result.size() : 0);
+            return result;
+        } catch (Exception e) {
+            log.error("FeatureV2RemoteService.getFeature: unexpected exception", e);
             return Collections.emptyMap();
         }
-        return client.multiGetFeature(protos);
     }
 
 }