This article provides a detailed overview of AWS Lambda error handling with SQS integration. Batch Size and Error Handling with the SQS integration While you set up your SQS event integration, you get the chance to configure a “batchSize” property, which would specify the maximum number of SQS messages to be sent to the Lambda function every time a single trigger is set. It is considered as a very interesting and important property, but caution is necessary for assuring it’s correctly being tuned for fitting your every single need. Batches of messages being sent into one single invocation is capable of reducing costs and […]

Needed Procedure prior to the Creation of a Role for SAML: For the sake of preparing for the creation of a role for SAML 2.0 federation, you will need to follow the below steps: 1. Prior to heading for the creation of a role for SAML-based federation, you will need to get a SAML provider created in IAM. 2. Get the policies ready for the role which is going to be assumed by SAML 2.0–authenticated users. A SAML federation role will be having the following 2 policies: – Role trust policy to define the role’s assumers. – IAM permissions policy […]

SQS Lambda Polling How Does the Lambda Integration Work? Lambda service, which is not a Lambda function, but rather a Lambda SQS long-poll service that runs on your behalf, will be the one that is going to poll your SQS queue continually for all incoming messages. As soon as a message arrives, it will start by receiving this message and, later on invoking the Lambda function by passing this message as a parameter. This is what a typical message event would look like to a Lambda function which is going to be handling the messages that are passed in: Along […]

SQS Lambda Concurrency How do both the SQS and Lambda get implemented together for concurrency? While attempting to work with SQS, you must wait for messages to get received, then get them processed and deleted from the queue. In case you forget to delete the message, it will return after the specified VisibilityTimeout since SQS believes that the processing has failed and shall make it available for consumption again, so you’re not going to lose any messages. This process will not be applied while utilizing SQS as an event source for Lambda because you won’t be touching the SQS part! The function […]

AWS Lambda Queue A Lambda function may be used for processing messages in a Simple Queue Service queue. The following queue types are supported by Lambda event source mappings: standard queues + first-in, first-out queues. SQS will allow you to start offloading tasks from one component of your app through sending them to a queue and then getting them processed asynchronously. Lambda will poll the queue and later on invoke the function in a synchronous manner along with an event containing queue messages. Lambda will go ahead and read messages in batches then get your function invoked once for every batch. As your function gets a […]

What’s wrong with polling? A lot of customers may require to implement the delivery of some long-running activities, like a query to a data warehouse or lake, or for a retail order fulfillment. They might get a polling solution developed just like the one shown below: POST will first send a request. GET will return an empty response. A different GET will also return an empty response. Yet a different other GET will return an empty response. In the end, GET will return the data you had long been looking. Hardships of traditional polling methods Unneeded chattiness and additional cost […]

What is AWS Lambda EventSourceMapping AWS::Lambda::EventSourceMapping resource: It helps you to create a mapping between an event source + a Lambda function. Lambda will start reading the items from event source and then triggering this function. Its Syntax For declaring this entity into a CloudFormation template, you must rely on the below syntax: – JSON – YAML Type: AWS::Lambda::EventSourceMapping Properties: BatchSize: Integer BisectBatchOnFunctionError: Boolean DestinationConfig:     DestinationConfig Enabled: Boolean EventSourceArn: String FunctionName: String MaximumBatchingWindowInSeconds: Integer MaximumRecordAgeInSeconds: Integer MaximumRetryAttempts: Integer ParallelizationFactor: Integer StartingPosition: String Its Properties: BatchSize This refers to the max number of items to be retrieved from a single batch. […]

AWS Lambda Destinations This feature sheds the light on function invocations and takes the results of execution to AWS services, making event-driven applications easier and reducing the complexity of every code. Asynchronous Invocations and their Destinations As a function gets invoked asynchronously these are the steps that occur: – Lambda will start by sending the event to stay in an internal queue – Another process will be reading events from this queue and will execute your function which was sent by Lambda – As the event gets added to the queue, Lambda would have prior to this simply returned a 2xx […]

What are AWS Lambda Triggers CloudFront Events for Triggering a Lambda Function For every single cache behavior found in a CloudFront distribution, it’s possible to add up to 4 triggers for a Lambda function to start executing upon the occurrence of specific CloudFront events. CloudFront triggers may be based upon 1 of 4 CloudFront events, just like what is displayed in the below diagram. CloudFront events for triggering Lambda@Edge functions are listed below: – Viewer Request The function will be executed as soon as CloudFront receives a request from any viewer, prior to checking if the requested object is found […]

AWS Lambda Throttle – Limits of Concurrency Every single region found in your account includes what is called a Lambda concurrency limit. This limit decides on the number of function invocations are capable of being run simultaneously in just a single region. It is applied to every single function located in the exact similar region and set to a 1000 [by default]. In case a concurrency limit gets exceeded, Lambda will begin throttling those offending functions through the act of rejecting requests. According to which type of invocation is made, the below situations will occur: Synchronous Sources of Invocation: On Demand, API […]

Aws Lambda Synchronous Vs. Asynchronous This article provides a general overview about Synchronous & Asynchronous functionality of AWS Lambda, also highlights few of the use-cases in general. Sync or Async? Upon executing code with Lambda, you may invoke your functions synchronously or asynchronously. They are both useful and required for various situations, but are accompanied with interesting use-cases also in serverless space. Synchronous functions: Utilized for discovering what the result of an operation, prior to carrying on along to your next one. Simple to start with, just like invoking one function which performs a calculation and later on utilizes its result […]

AWS Lambda Response Size Limit and Deployment Packages AWS Lambda Response Size Limit While trying to work with Lambda functions you will constantly worry about the allowed size of deployment packages. First, we need to take a look at the Lambda deployment limits and then start addressing the 50 MB package size in the official documentation of AWS. It is a delusive process since you can create larger deployments of files that are uncompressed. Inefficiently implemented lambda functions will cost you more than you anticipate.   Ask these questions first: How much do you currently spend on each Lambda function? […]

AWS Lambda Reserved Concurrency The feature of Concurrency Limits on Individual AWS Lambda Functions has been announced in 2017.   Each Lambda function includes a new configuration option known as Reserved Concurrency, which is simply a single numerical value which you have the chance to get assigned to your Lambda function’s configuration, through either the web console, or the SDK/CLI: There are 2 effects resulting from this configuration value being set: limiting the number of instances for your Lambda function which may possibly be instantiated whenever needed to the value which you specify. Making sure to have a minimum of necessary concurrency […]

AWS Lambda Invoke AWS Lambda Invoke Lambda functions can be invoked directly using: Lambda console Lambda API AWS SDK AWS CLI AWS toolkits + Or by configuring other AWS services for the sake of invoking your function + Or by configuring Lambda to start reading from a stream or queue then invoking your function Upon invoking a function, you will be given the chance to choose between invoking synchronously or asynchronously. Synchronous: awaiting the function to finish processing the event and then returning a response. Asynchronous: Lambda will queue the event to get it processed and then it will return […]

AWS Lambda Scaling When you get your function invoked for the first time ever, Lambda will create an instance of this function and then run its handler method for the sake of processing the event. As soon as a response is returned by the function, it will remain active and await to take on some extra events. In the case of invoking the function another time as the first event gets processed, Lambda will then initialize one other instance, allowing the function to process both events concurrently. While additional events join, Lambda starts routing them to available instances and creating […]

AWS Lambda Edge Limits Quotas Quotas included in this section are applied to Lambda@Edge. They are in addition to the CloudFront and Lambda quotas that come by default and are also applied. Important Lambda will scale capacity in a dynamic manner as a response to increased traffic, found in the quotas of your account. Also, you need to remain aware of the fact that there exists more restrictions while using Lambda@Edge functions. Quotas that differ by event type Other Quotas URI and Query String Size Quotas Upon the access or update of a URI or query string in a Lambda@Edge […]

What is AWS Lambda Console This console aids the user in monitoring and managing their Lambda apps. The Applications menu: – Displays a list of CloudFormation stacks with their Lambda functions – Contains stacks that are launched by the user in CloudFormation through using one of the following: CloudFormation console AWS Serverless Application Repository AWS CLI AWS SAM CLI For Viewing a Lambda App Head to the Lambda console Applications page. Select an app. This will allow you to check the below information about your chosen app. AWS CloudFormation templateor SAM template: This template is a definition of your app. Resources: These are your AWS […]

How AWS Lambda Concurrency Works? The short definition of AWS Lambda concurrency is the number of requests served by your function at any time. Upon the invocation of your function, an instance of it will be allocated by Lambda for processing the event. As soon as the function code reaches the end of its running process, a new request may now be handled by it. In case of invoking the function once more as a request is yet getting processed, an allocation of another instance occurs, and this will end up increasing the function’s concurrency. Subject to a Regional limit […]