diff --git a/infra/common/src/main/java/org/apache/shardingsphere/infra/rule/builder/database/DatabaseRulesBuilder.java b/infra/common/src/main/java/org/apache/shardingsphere/infra/rule/builder/database/DatabaseRulesBuilder.java
index f446c5e26b8292..312f09f3438d64 100644
--- a/infra/common/src/main/java/org/apache/shardingsphere/infra/rule/builder/database/DatabaseRulesBuilder.java
+++ b/infra/common/src/main/java/org/apache/shardingsphere/infra/rule/builder/database/DatabaseRulesBuilder.java
@@ -19,6 +19,7 @@
 
 import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.apache.shardingsphere.infra.config.database.DatabaseConfiguration;
 import org.apache.shardingsphere.infra.config.rule.RuleConfiguration;
 import org.apache.shardingsphere.infra.config.rule.checker.RuleConfigurationChecker;
@@ -43,6 +44,7 @@
  * Database rules builder.
  */
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
+@Slf4j
 public final class DatabaseRulesBuilder {
     
     /**
@@ -62,6 +64,9 @@ public static Collection<ShardingSphereRule> build(final String databaseName, fi
             if (null != configChecker) {
                 configChecker.check(databaseName, entry.getKey(), databaseConfig.getDataSources(), result);
             }
+            if (entry.getKey().getClass().getName().contains("SingleRule")) {
+                log.error("========from build1======");
+            }
             result.add(entry.getValue().build(entry.getKey(), databaseName, databaseConfig.getDataSources(), result, instanceContext));
         }
         return result;
@@ -88,6 +93,9 @@ public static Collection<ShardingSphereRule> build(final String databaseName, fi
             if (null != configChecker) {
                 configChecker.check(databaseName, entry.getKey(), dataSources, rules);
             }
+            if (entry.getKey().getClass().getName().contains("SingleRule")) {
+                log.error("========from build2======");
+            }
             result.add(entry.getValue().build(entry.getKey(), databaseName, dataSources, rules, instanceContext));
         }
         return result;