Shuffle nodeurls to make sure all connections aren't to the first nod…

…e by default #14983 (#14986)

Signed-off-by: OneSizeFitQuorum <tanxinyu@apache.org>

iotdb-client/session/src/main/java/org/apache/iotdb/session/Session.java

@@ -412,6 +412,7 @@ public Session(
     if (nodeUrls.isEmpty()) {
       throw new IllegalArgumentException("nodeUrls shouldn't be empty.");
     }
+    Collections.shuffle(nodeUrls);
     this.nodeUrls = nodeUrls;
     this.username = username;
     this.password = password;
@@ -428,6 +429,7 @@ public Session(Builder builder) {
       if (builder.nodeUrls.isEmpty()) {
         throw new IllegalArgumentException("nodeUrls shouldn't be empty.");
       }
+      Collections.shuffle(builder.nodeUrls);
       this.nodeUrls = builder.nodeUrls;
       this.enableQueryRedirection = true;
     } else {