Method Reconciler#reconcile is not triggered when resource is deleted.

[nevenr]

Bug Report

I wanted to create metric exporter for certain resource type.
For this I implemented Reconciler with triggerReconcilerOnAllEvents enabled (introducerd in JOSDK 5.2) to receive all events (create, update and delete).

Method Reconciler#reconcile is not triggered when resource is deleted.

What did you do?

@ControllerConfiguration(triggerReconcilerOnAllEvents = true, generationAwareEventProcessing = false)
public class MyResourceReconciler implements Reconciler<MyResource>{

    private static final Logger LOG = Logger.getLogger(MyResourceReconciler.class);

    @Override
    public UpdateControl<MyResource> reconcile(MyResource resource, Context<MyResource> context) throws Exception {
	   LOG.infof("Resource %s/%s event", resource.getMetadata().getNamespace(), resource.getMetadata().getName());
        if(context.isPrimaryResourceDeleted()){
            LOG.infof("deleted");
            return UpdateControl.noUpdate();
        }
        LOG.infof("created/updated");
        return UpdateControl.noUpdate();
    }

}

What did you expect to see?

When I create, update and delete resource I expected to see in logs:

INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-92) Resource mynamespace/myresource event
INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-92) created/updated
INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-93) Resource mynamespace/myresource event
INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-93) created/updated
INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-93) Resource mynamespace/myresource event
INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-93) deleted

What did you see instead? Under which circumstances?

When I create, update and delete resource I see in logs:

INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-92) Resource mynamespace/myresource event
INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-92) created/updated
INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-93) Resource mynamespace/myresource event
INFO  [com.test.MyResourceReconciler] (ReconcilerExecutor-myresourcereconciler-93) created/updated

Environment

Kubernetes cluster type:

OpenShift 4.19.43

$ Mention java-operator-sdk version from pom.xml file

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>io.quarkus.platform</groupId>
                <artifactId>quarkus-bom</artifactId>
                <version>3.39.3</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>io.quarkus.platform</groupId>
                <artifactId>quarkus-operator-sdk-bom</artifactId>
                <version>3.39.3</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependency>
        <groupId>io.quarkiverse.operatorsdk</groupId>
        <artifactId>quarkus-operator-sdk</artifactId>
    </dependency>

resolves to: io.javaoperatorsdk:operator-framework-core:5.5.0

$ java -version

openjdk version "25.0.4.1" 2026-08-18 LTS
OpenJDK Runtime Environment Temurin-25.0.4.1+1 (build 25.0.4.1+1-LTS)
OpenJDK 64-Bit Server VM Temurin-25.0.4.1+1 (build 25.0.4.1+1-LTS, mixed mode, sharing)

$ kubectl version

Client Version: 4.19.0-202608112108.p2.gb2a93a6.assembly.stream.el9-b2a93a6
Kustomize Version: v5.5.0
Kubernetes Version: v1.32.13

Additional context

• resources does not have finalizers
• adding defaultFilters = false to ControllerConfiguration did not helped

[csviri]

@nevenr thx for reporting we will take a look. Please use the latest version of the framework if possible.

[csviri]

Note that we have an integration test for this:

java-operator-sdk/operator-framework/src/test/java/io/javaoperatorsdk/operator/baseapi/triggerallevent/eventing/TriggerReconcilerOnAllEventIT.java

Lines 81 to 98 in 748f3a3

	@Test
	void deleteEventPresentWithoutFinalizer() {
	var reconciler = extension.getReconcilerOfType(TriggerReconcilerOnAllEventReconciler.class);
	reconciler.setUseFinalizer(false);
	extension.serverSideApply(testResource());
	await().untilAsserted(() -> assertThat(reconciler.isResourceEventPresent()).isTrue());
	extension.delete(getResource());
	await()
	.untilAsserted(
	() -> {
	var r = getResource();
	assertThat(r).isNull();
	assertThat(reconciler.isDeleteEventPresent()).isTrue();
	});
	}

Could you pls provide a simple reproducer?

[csviri]

added this small fix for deprecated flag, but this does not seems to be your case: #3622

[nevenr]

Hi,

Please find reproducer: https://github.com/nevenr/java-operator-sdk-reproducer-3621

• First login to some Kubernetes/OpenShift cluster with CLI, e.g.
  • oc login --server=http.... --token=abc....
• Run Quarkus development
  • mvn quarkus:dev
• then create one ConfigMap and you will see in log two lines
  • ConfigMap namespace/ name event
  • created/updated
• then update that ConfigMap and you will see in log two lines
  • ConfigMap namespace/ name event
  • created/updated
• and then delete ConfigMap and there is not event at all, no new related logging statements

Regards,
N.

[csviri]

@metacosm @xstefank could you take this one please, I suspect that there will some something we the Quarkus configurations