Error raised while calling invoke agent operation

Question

Detailed Error: An error occurred (validationException) when calling the InvokeAgent operation: An error occurred when attempting to parse the model response with the default parser. Check your overridden prompt configurations or attach a lambda parser to handle the response. Then retry your request.

Below is the code used for invoking agent:

invoke_agent_params = {
            "agentAliasId": agentAliasId,
            "agentId": agentId,
            "inputText": query,
            "sessionId": conversationId
        }
agent_response = bedrock_agent.invoke_agent(**invoke_agent_params)
completion = ""
for event in agent_response.get("completion"):
 chunk = event["chunk"]
 completion = completion + chunk["bytes"].decode()

Osvaldo Marte · Answer

> ℹ️ This type of error usually occurs when the input parameters or configurations do not meet the expected format or when there is a misconfiguration in handling the response

> 💡 Since Bedrock Agent uses a default parser lambda function that isn't visible to you, the best approach to debug issues is to ensure that the data sent to the agent conforms exactly to the expected format. Add extensive logging before the API call to verify that all parameters are correct and complete.

Gillian · Answer

Check the output format from any Lambda functions, it needs to be in a specific format for the default parser to be able to parse it: https://docs.aws.amazon.com/bedrock/latest/userguide/lambda-parser.html

Jose · Answer

Hi @Gillian, we are not using any Parser Lambda function. After going through the link that you have shared, i have understood that Bedrock Agent uses a default parser lambda function which is not visible to us. Can you provide a way to debug the issues in that? Since we don't prefer to use a custom parser lambda function.

Error raised while calling invoke agent operation

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