pan3793 commented on code in PR #7408:
URL: https://github.com/apache/kyuubi/pull/7408#discussion_r3119489918


##########
kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/ldap/Query.scala:
##########
@@ -56,7 +58,9 @@ object Query {
      * @return the current instance of the builder
      */
     def filter(filterTemplate: String): Query.QueryBuilder = {
-      this.filterTemplate = new ST(filterTemplate)
+      val group = new STGroup()
+      this.filterTemplateGroup = Some(group)
+      this.filterTemplate = new ST(group, filterTemplate)

Review Comment:
   I mean
   
   ```
   builder
     .filter("exp1")
     .filter("exp2") // this replaces exp1
     .build()
   ```
   
   will this case cause a leak?



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