Skip to content

Put Function Recursion Config

lambda_put_function_recursion_config R Documentation

Sets your function's recursive loop detection configuration

Description

Sets your function's recursive loop detection configuration.

When you configure a Lambda function to output to the same service or resource that invokes the function, it's possible to create an infinite recursive loop. For example, a Lambda function might write a message to an Amazon Simple Queue Service (Amazon SQS) queue, which then invokes the same function. This invocation causes the function to write another message to the queue, which in turn invokes the function again.

Lambda can detect certain types of recursive loops shortly after they occur. When Lambda detects a recursive loop and your function's recursive loop detection configuration is set to Terminate, it stops your function being invoked and notifies you.

Usage

lambda_put_function_recursion_config(FunctionName, RecursiveLoop)

Arguments

FunctionName

[required] The name or ARN of the Lambda function.

Name formats

  • Function name – ⁠my-function⁠.

  • Function ARN – ⁠arn:aws:lambda:us-west-2:123456789012:function:my-function⁠.

  • Partial ARN – ⁠123456789012:function:my-function⁠.

The length constraint applies only to the full ARN. If you specify only the function name, it is limited to 64 characters in length.

RecursiveLoop

[required] If you set your function's recursive loop detection configuration to Allow, Lambda doesn't take any action when it detects your function being invoked as part of a recursive loop. We recommend that you only use this setting if your design intentionally uses a Lambda function to write data back to the same Amazon Web Services resource that invokes it.

If you set your function's recursive loop detection configuration to Terminate, Lambda stops your function being invoked and notifies you when it detects your function being invoked as part of a recursive loop.

By default, Lambda sets your function's configuration to Terminate.

If your design intentionally uses a Lambda function to write data back to the same Amazon Web Services resource that invokes the function, then use caution and implement suitable guard rails to prevent unexpected charges being billed to your Amazon Web Services account. To learn more about best practices for using recursive invocation patterns, see Recursive patterns that cause run-away Lambda functions in Serverless Land.

Value

A list with the following syntax: 

list(
  RecursiveLoop = "Allow"|"Terminate"
)

Request syntax

svc$put_function_recursion_config(
  FunctionName = "string",
  RecursiveLoop = "Allow"|"Terminate"
)