1---2name: azure-messaging-23description: Troubleshoot and resolve issues with the Azure Messaging SDKs for Event Hubs and Service Bus, covering connection failures, authentication errors, message processing problems, and SDK configuration. Use when the user hits an Event Hubs or Service Bus SDK error, AMQP or connection failure, event processor host issue, lost or expired message lock, lock renewal problem, send timeout, disconnected receiver, checkpoint or offset issue, dead-letter or session error, duplicate events, or needs SDK logging enabled in .NET, Java, Python, or JavaScript.4license: MIT5---67# Azure Messaging SDK Troubleshooting89## Quick Reference1011| Property | Value |12|----------|-------|13| **Services** | Azure Event Hubs, Azure Service Bus |14| **MCP Tools** | `mcp_azure_mcp_eventhubs`, `mcp_azure_mcp_servicebus` |15| **Best For** | Diagnosing SDK connection, auth, and message processing issues |1617## When to invoke1819- SDK connection failures, auth errors, or AMQP link errors20- Idle timeout, connection inactivity, or slow reconnection after disconnect21- AMQP link detach or detach-forced errors22- Message lock lost, message lock expired, lock renewal failures, or batch lock timeouts23- Session lock lost, session lock expired, or session receiver errors24- Event processor or message handler stops processing25- Duplicate events or checkpoint offset resets26- SDK configuration questions (retry, prefetch, batch size, receive batch behavior)2728## MCP Tools2930| Tool | Command | Use |31|------|---------|-----|32| `mcp_azure_mcp_eventhubs` | Namespace/hub ops | List namespaces, hubs, consumer groups |33| `mcp_azure_mcp_servicebus` | Queue/topic ops | List namespaces, queues, topics, subscriptions |34| `mcp_azure_mcp_monitor` | `logs_query` | Query diagnostic logs with KQL |35| `mcp_azure_mcp_resourcehealth` | `get` | Check service health status |36| `mcp_azure_mcp_documentation` | Doc search | Search Microsoft Learn for troubleshooting docs |3738## Diagnosis Workflow39401. **Identify the SDK and version** — Check the prompt for SDK and version clues; if not stated, proceed with diagnosis and ask later if needed412. **Check resource health** — Use `mcp_azure_mcp_resourcehealth` to verify the namespace is healthy423. **Review the error message** — Match against language-specific troubleshooting guide434. **Look up documentation** — Use `mcp_azure_mcp_documentation` to search Microsoft Learn for the error or topic445. **Check configuration** — Verify connection string, entity name, consumer group456. **Recommend fix** — Apply remediation, citing documentation found464748## Troubleshooting Guides4950Connectivity, SDK, and auth troubleshooting guides are located in the azure-diagnostics skill under `troubleshooting/messaging/`.5152## References5354- Use `mcp_azure_mcp_documentation` to search Microsoft Learn for latest guidance.5556## Output template5758```markdown59## Messaging troubleshooting result6061**Status:** resolved | mitigated | inconclusive62**Summary:** <one sentence covering scope and outcome>6364### Details65Error signature, root cause, and the SDK or configuration fix.6667### Validation68- <check performed>: <result and evidence>69```7071## Quality gate7273- [ ] The diagnosis matches the observed SDK error and client version.74- [ ] The fix names the specific SDK setting or code change.75- [ ] The output follows `## Output template` exactly.76- [ ] Every reported check was performed and its evidence is shown.77- [ ] Irreversible Azure actions were confirmed with the user first.