Declare a Service Bus queue Azure accepts in the Java Terraform sample

[paolosalvatori]

Motivation

The Terraform variant of the servicebus/java sample declares a Service Bus queue that Azure does not accept, and an app that could not use it if it did.

• The queue is partitioned, express and duplicate-detecting. Azure refuses that combination: "Both DelayedPersistence and RequiresDuplicateDetection property can't be enabled together. Entities with Duplicate detection enabled on them must be persistent, so persistence can't be delayed." (Service Bus Resource Manager exceptions). A queue with these three settings created through the Service Bus management API on 2026-10-12 got exactly that MessagingGatewayBadRequest.
• The queue also requires sessions, while the Spring Boot app sends and receives without a session ID: "When you enable sessions on a queue or a subscription, client applications can no longer send or receive regular messages" (Message sessions).

The sample only ran because the emulator accepted any queue. With localstack-pro#9364 the Service Bus emulator validates queues and enforces sessions as Azure does, so terraform apply now fails on this queue with Azure's error.

Fixes SMF-938
Related SMF-865

Changes

• samples/servicebus/java/terraform/variables.tf: servicebus_queue_express_enabled and servicebus_queue_requires_session default to false, like the queue of the Azure CLI and Bicep variants of the sample. Duplicate detection and partitioning stay on: Azure accepts them together.

Tests

• On an emulator image built from localstack-pro#9364, the sample's terraform/deploy.sh provisions the queue and the app prints Received message from Azure Service Bus: Hello, World!, with LS_AZURE_ENFORCE_RBAC off and on. Before this change the same image refuses the queue with MessagingGatewayBadRequest.
• On Azure, a Standard namespace accepts a queue that is partitioned, duplicate-detecting and session-enabled and refuses it once it is also express (probed on 2026-10-12); this change turns off both express and sessions.
• The Azure CLI and Bicep variants of the sample are unchanged and pass on the same image.

🤖 Generated with Claude Code

[Copilot]

🟢 Approval recommended

The defaults now match Azure constraints and the application’s messaging behavior.

0 open findings

What changed in this PR

Updates the Java Service Bus Terraform sample to provision an Azure-compatible queue usable by its non-session-aware application.

Changes:

• Disables sessions by default.
• Disables express entities to remain compatible with duplicate detection.

File	Description
samples/​servicebus/​java/​terraform/​variables.tf	Sets Azure-compatible queue defaults.

🧠 Review effort: Balanced

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