# Observability

{% hint style="info" %}
This page was generated from content adapted from the [AWS Developer Guide](https://github.com/awsdocs/aws-app-mesh-user-guide.git)
{% endhint %}

## Logging

* **Important**\
  Make sure to check that your input pattern is valid for Envoy, or Envoy will reject the update and store the latest changes in the `error state`.

## Tracing

* **Important**\
  To fully implement tracing, you'll need to update your application.\
  To see all the available data from your chosen service, you'll have to instrument your application using the applicable libraries.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://awsnotes.dendron.so/networking-and-content-delivery/aws-app-mesh/topics/observability.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.