diff --git a/chat/core/src/main/java/com/tencent/supersonic/chat/processor/MetricCheckProcessor.java b/chat/core/src/main/java/com/tencent/supersonic/chat/processor/MetricCheckProcessor.java
index 958ff57de..7160df7fa 100644
--- a/chat/core/src/main/java/com/tencent/supersonic/chat/processor/MetricCheckProcessor.java
+++ b/chat/core/src/main/java/com/tencent/supersonic/chat/processor/MetricCheckProcessor.java
@@ -15,7 +15,6 @@ import com.tencent.supersonic.chat.service.SemanticService;
 import com.tencent.supersonic.common.pojo.QueryType;
 import com.tencent.supersonic.common.pojo.enums.TimeDimensionEnum;
 import com.tencent.supersonic.common.util.ContextUtils;
-import com.tencent.supersonic.common.util.JsonUtil;
 import com.tencent.supersonic.common.util.jsqlparser.SqlParserRemoveHelper;
 import com.tencent.supersonic.common.util.jsqlparser.SqlParserSelectHelper;
 import lombok.extern.slf4j.Slf4j;