Javascript SDK v3 InvokeAgentCommand not returning chunks

Question

I'm trying to call a bedrock agent from a react native app using the following code snippet:

```
const testInput = {
    agentId, // required
    agentAliasId, // required
    sessionId: _sessionId, // required
    inputText: question,
  };

const command = new InvokeAgentCommand(testInput);
  const response = await client.send(command);
  console.log ("!!!response: ", response);
  let completion = ""
  for await (const chunkEvent of response.completion) {
    if (chunkEvent.chunk) {
      const chunk = chunkEvent.chunk;
      let decoded = new TextDecoder("utf-8").decode(chunk.bytes);
      completion += decoded;
    }
  }
  LOG.debug("!!!completion: ", completion);
```

When I look at the logs, the "chunk" object is not in the "completion" object.

**When I run the same API (via python3/boto3), I get a response.
**
Does anyone have an idea what I'm doing wrong?

Shubham Gupta · Answer

Hello,

I understand that you are concerned about InvokeAgentCommand not returning chunks when trying to call Bedrock agent from a React Native app, but you're not getting the expected 'chunk' object from the 'completion' in your logs and would like to gather more information on the same.

Here, looking at the issue, one possibility could be that the response received could be empty, i.e.

The streaming functionality in React Native might behave differently compared to Python (boto3). Ensure that the method you're using to iterate over'response.completion` works properly. You can try logging 'response' to check the full structure and confirm whether 'completion' exists as expected.

Example: ```console.log("Response: ", response); ```

If the 'completion' object is not as expected, this could indicate a parsing issue or a difference in how the SDK handles the response in React Native.

Another possibility could be the AWS Permissions issue, i.e., since your Python code works and React Native doesn’t, ensure that the credentials used in the React Native app have the same permissions as those in Python (boto3). Double-check the IAM role or policy attached to your React Native app to ensure it has the necessary permissions to invoke the Bedrock agent and read chunked responses.

Further, it could also be due to the environment configuration issue, i.e., React Native handles network requests differently from backend environments like Python. Ensure that your network configuration (CORS, endpoints, etc.) in React Native is set up correctly for invoking AWS Bedrock agents, especially if you're working with streaming responses.

Furthermore, in case you still face the issue, we would request you to please share logs in order to further debug the issue.

Moreover, please note that AWS Premium Support doesn't cover custom code, React native development, or debugging, and that all support is provided on a best-effort basis. If you have any other enquiries regarding this, feel free to reach out, and I'll be more than happy to assist you.

I would request that you please refer to the aforementioned documentation once, and please reach out to AWS [2] with the detailed use case so that we can assist you better.

If you have any difficulty verifying any of the above-mentioned points or if you still run into issues, please reach out to AWS Support [2] (Bedrock) along with your issue or use case in detail, and we would be happy to assist you further.

References:

-------------
[1] https://aws.amazon.com/premiumsupport/

[2] Creating support cases and case management: https://docs.aws.amazon.com/awssupport/latest/user/case-management.html#creating-a-support-case

[3] https://aws.amazon.com/premiumsupport/faqs/

Javascript SDK v3 InvokeAgentCommand not returning chunks

Add your answer

Relevant content