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[KYUUBI #7407] STGroup free to avoid OOM Kill #7408

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[KYUUBI #7407] STGroup free to avoid OOM Kill #7408

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28cadbc
STGroup free to avoid OOM Kill
Apr 16, 2026
321c430
Update kyuubi-common/src/main/scala/org/apache/kyuubi/service/authent…
oh0873 Apr 20, 2026
dd0f910
Explicit group definition
Apr 20, 2026
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10 changes: 8 additions & 2 deletions kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/ldap/Query.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ package org.apache.kyuubi.service.authentication.ldap
import java.util
import javax.naming.directory.SearchControls

import org.stringtemplate.v4.ST
import org.stringtemplate.v4.{ST, STGroup}

/**
* The object that encompasses all components of a Directory Service search query.
Expand All @@ -40,6 +40,8 @@ object Query {
* A builder of the [[Query]].
*/
final class QueryBuilder {
/** The [[STGroup]] used only for this builder's filter template; unloaded in [[build]]. */
private var filterTemplateGroup: Option[STGroup] = None
private var filterTemplate: ST = _
private val controls: SearchControls = {
val _controls = new SearchControls
Expand All @@ -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)
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@pan3793 pan3793 Apr 21, 2026

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does cache only happen in filterTemplate.render?

what will happen if we call def filter multi times?

this
}

Expand Down Expand Up @@ -127,6 +131,8 @@ object Query {
def build: Query = {
validate()
val filter: String = createFilter
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@pan3793 pan3793 Apr 21, 2026

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could you update the def createFilter to add a () to the signature? because it actually has a side-effect.

// Unload template cache after render to avoid CompiledST/STToken retention
filterTemplateGroup.foreach(_.unload())
updateControls()
new Query(filter, controls)
}
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