Fix code smell
diff --git a/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/conf/SystemPropertiesUtils.java b/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/conf/SystemPropertiesUtils.java
index 7e0f9de..9faebf5 100644
--- a/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/conf/SystemPropertiesUtils.java
+++ b/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/conf/SystemPropertiesUtils.java
@@ -292,7 +292,7 @@
         SERIES_PARTITION_EXECUTOR_CLASS, conf.getSeriesPartitionExecutorClass());
     systemProperties.setProperty(
         TIME_PARTITION_INTERVAL, String.valueOf(COMMON_CONFIG.getTimePartitionInterval()));
-    systemProperties.setProperty("timestamp_precision", COMMON_CONFIG.getTimestampPrecision());
+    systemProperties.setProperty(TIMESTAMP_PRECISION, COMMON_CONFIG.getTimestampPrecision());
 
     // DataNode Functions
     systemProperties.setProperty("schema_engine_mode", COMMON_CONFIG.getSchemaEngineMode());
diff --git a/iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/conf/CommonDescriptor.java b/iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/conf/CommonDescriptor.java
index d18adf7..542806b 100644
--- a/iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/conf/CommonDescriptor.java
+++ b/iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/conf/CommonDescriptor.java
@@ -25,16 +25,11 @@
 import org.apache.iotdb.commons.utils.NodeUrlUtils;
 import org.apache.iotdb.confignode.rpc.thrift.TGlobalConfig;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.io.File;
 import java.util.Properties;
 
 public class CommonDescriptor {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(CommonDescriptor.class);
-
   private final CommonConfig config = new CommonConfig();
 
   private CommonDescriptor() {}