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fix: ownerRef for driver pod, ensuring correct GC cascade #758

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fix: ownerRef for driver pod, ensuring correct GC cascade #758

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Fixing ownerRef for driver pod, ensuring correct GC cascade
Maleware Aug 26, 2026
e4e398d
Merge branch 'main' into fix/701-restore-driver-ownerreference
Maleware Aug 27, 2026
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13 changes: 7 additions & 6 deletions rust/operator-binary/src/spark_k8s_controller/build/pod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -280,15 +280,16 @@ pub(crate) fn pod_template(

let mut metadata = omb.build();

// We explicitly remove the application owner reference from driver and executor pods.
// We explicitly remove the application owner reference from executor pods.
//
// The executors then only have the driver as owner and Kubernetes can garbage collect them
// early when the driver pod or the spark-submit job is deleted.
// Drivers must not have the SparkApplication as owner because this prevents proper cleanup
// when the application is finished.
// The submit pod doesn't use this function right now, but we keep the "if" below for future
// sanity.
if role == SparkApplicationRole::Executor || role == SparkApplicationRole::Driver {
//
// The driver keeps the SparkApplication as owner so that deleting the application cascades
// to the driver and, through it, to the executors. Without this, deleting the application
// orphans both roles for as long as the application does not reach a terminal phase, which
// never happens for streaming jobs.
if role == SparkApplicationRole::Executor {
metadata.owner_references = None;
}

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