Remove the volatile keyword.

Author: zerolbsony

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/protocol/session/IClientSession.java

@@ -38,27 +38,27 @@
 
 public abstract class IClientSession {
 
-  private volatile long id;
+  private long id;
 
   private ClientVersion clientVersion;
 
   private ZoneId zoneId;
 
   private TimeZone timeZone;
 
-  private volatile long userId;
+  private long userId;
 
-  private volatile String username;
+  private String username;
 
-  private volatile boolean login = false;
+  private boolean login = false;
 
   private long logInTime;
 
   private SqlDialect sqlDialect = SqlDialect.TREE;
 
   @Nullable private String databaseName;
 
-  private volatile long lastActiveTime = CommonDateTimeUtils.currentTime();
+  private long lastActiveTime = CommonDateTimeUtils.currentTime();
 
   public abstract String getClientAddress();