Cannot delete namespaces

[AdamSendible]

Issue

When trying to delete a TemporalNamespace I often encounter issues where the operator gets stuck and fails to reconcile Temporal namespaces.

Logs

│ 2025-06-26T14:35:39Z    INFO    Starting reconciliation    {"controller": "temporalnamespace", "controllerGroup": "temporal.io", "controllerKind": "TemporalNamespace", "TemporalNamespace": {"name":"debugging │
│ ","namespace":"workers"}, "namespace": "workers", "name": "debugging", "reconcileID": "984db7f0-dc94-42d4-9c90-4f37195c34ce"}                                                                                   │
│ 2025-06-26T14:35:39Z    INFO    Deleting namespace    {"controller": "temporalnamespace", "controllerGroup": "temporal.io", "controllerKind": "TemporalNamespace", "TemporalNamespace": {"name":"debugging","na │
│ mespace":"workers"}, "namespace": "workers", "name": "debugging", "reconcileID": "984db7f0-dc94-42d4-9c90-4f37195c34ce"}                                                                                        │
│ 2025-06-26T14:35:39Z    DEBUG    Connecting to temporal cluster    {"controller": "temporalnamespace", "controllerGroup": "temporal.io", "controllerKind": "TemporalNamespace", "TemporalNamespace": {"name":"d │
│ ebugging","namespace":"workers"}, "namespace": "workers", "name": "debugging", "reconcileID": "984db7f0-dc94-42d4-9c90-4f37195c34ce", "address": "active-frontend.temporal:7233"}                               │
│ 2025-06-26T14:35:39Z    INFO    try to delete but not found    {"controller": "temporalnamespace", "controllerGroup": "temporal.io", "controllerKind": "TemporalNamespace", "TemporalNamespace": {"name":"debug │
│ ging","namespace":"workers"}, "namespace": "workers", "name": "debugging", "reconcileID": "984db7f0-dc94-42d4-9c90-4f37195c34ce", "namespace": "debugging"}                                                     │
│ 2025-06-26T14:35:39Z    ERROR    Reconciler error    {"controller": "temporalnamespace", "controllerGroup": "temporal.io", "controllerKind": "TemporalNamespace", "TemporalNamespace": {"name":"debugging","nam │
│ espace":"workers"}, "namespace": "workers", "name": "debugging", "reconcileID": "984db7f0-dc94-42d4-9c90-4f37195c34ce", "error": "unable to patch object: TemporalNamespace.temporal.io \"debugging\" is invali │
│ d: metadata.finalizers: Forbidden: no new finalizers can be added if the object is being deleted, found new finalizers []string{\"foregroundDeletion\"}", "errorCauses": [{"error": "unable to patch object: Te │
│ mporalNamespace.temporal.io \"debugging\" is invalid: metadata.finalizers: Forbidden: no new finalizers can be added if the object is being deleted, found new finalizers []string{\"foregroundDeletion\"}", "e │
│ rrorCauses": [{"error": "unable to patch object: TemporalNamespace.temporal.io \"debugging\" is invalid: metadata.finalizers: Forbidden: no new finalizers can be added if the object is being deleted, found n │
│ ew finalizers []string{\"foregroundDeletion\"}"}]}]}                                                                                                                                                            │
│ sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller[...]).reconcileHandler                                                                                                                      │
│     /go/pkg/mod/sigs.k8s.io/controller-runtime@v0.19.3/pkg/internal/controller/controller.go:316                                                                                                                │
│ sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller[...]).processNextWorkItem                                                                                                                   │
│     /go/pkg/mod/sigs.k8s.io/controller-runtime@v0.19.3/pkg/internal/controller/controller.go:263                                                                                                                │
│ sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller[...]).Start.func2.2                                                                                                                         │
│     /go/pkg/mod/sigs.k8s.io/controller-runtime@v0.19.3/pkg/internal/controller/controller.go:224 

Current Workaround

To solve this I usually have to manually remove the finalizer from the TemporalNamespace object and also restart the operator itself as it gets stuck