InfoQ Homepage AWS Lambda Content on InfoQ
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AWS Introduces Enhanced Custom Event Buses for EventBridge
AWS recently announced enhanced custom event buses for Amazon EventBridge, allowing organizations to share a centralized bus across accounts with ordered delivery, simplified subscriber management, event replay, content-based deduplication, and a new publisher/subscriber-based pricing model.
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Stateless MCP Removes Session Affinity Requirements for AWS Server Deployments
AWS details how the latest Model Context Protocol specification removes protocol-level sessions, sticky-session requirements, and session storage for remote MCP servers. The change enables independent request routing and simpler horizontal scaling while shifting application state, retries, observability, and idempotency concerns to other layers.
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AWS Lambda Pushes Serverless toward Long-Running Workloads
AWS Lambda now allows functions running on Lambda Managed Instances to run for up to 90 minutes, six times longer than the previous 15-minute limit, further blurring the line between a Lambda invocation and a traditional server. The limit remains unchanged for traditional synchronous requests.
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Lambda SnapStart Comes to Container Images, Ending a Packaging Tradeoff
AWS has extended Lambda SnapStart to container image functions, which hold up to 10 GB against 250 MB for zip archives. Teams previously chose between dependency headroom and sub-second startup. A Reddit thread from a month earlier shows what that cost: stripping whitespace and docstrings from installed packages to stay under the limit.
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AWS Introduces Specification-Driven Composition for Flexible Data Workflows
AWS describes a specification-driven approach for composing flexible data workflows by separating intent from processing logic. Architecture uses declarative specifications, reusable processing capabilities, and validation before execution. AWS reports that the approach can reduce dataset onboarding from weeks to days while supporting traceability, versioning, data classification, and governance.
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AWS Lambda's Self-Managed Code Storage Lifts the Account Quota, Not the Function Size Limit
AWS Lambda can now reference deployment packages directly in customer-owned S3 buckets, removing the per-Region code storage quota and raising the managed default from 75 GB to 300 GB. Per-function package limits are unchanged, and UpdateFunctionCode is still required after replacing an object. Terraform provider support remains an open enhancement request.
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AWS Launches Lambda MicroVMs for Isolated Agent and User Code Execution
AWS launched Lambda MicroVMs, a new serverless compute primitive that runs each user session or AI agent in its own Firecracker virtual machine with hardware-level isolation, snapshot-based rapid launch, and state preservation for up to eight hours. Reddit community analysis found the minimum setup costs $3.03/day, roughly 9x Fargate spot pricing.
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A Trailing Slash Bypassed AWS API Gateway Authorization
A security researcher found that adding a trailing slash to AWS HTTP API paths bypassed Lambda authorizer authentication entirely, enabling unauthenticated wire transfers at a fintech. The root cause is a path normalization mismatch between HTTP API's greedy route matching and its authorization layer. The same vulnerability class appeared in gRPC-Go via CVE-2026-33186.
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AWS Enables Lambda Function Triggers from RDS for SQL Server Database Events
In a blog post, AWS recently described an event-driven pattern for Amazon RDS for SQL Server, allowing developers to trigger Lambda functions in response to database events via CloudWatch Logs and SQS.
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.NET 10 Becomes Available on AWS Lambda as Managed Runtime and Base Image
Amazon Web Services has announced that AWS Lambda now supports the creation of serverless applications using .NET 10. With this update, developers can use .NET 10 both as a managed runtime and as a container-based image when building and running Lambda functions.
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Durable Functions and Werner Vogels’ Last Keynote: Highlights of AWS re:Invent 2025
The 2025 edition of re:Invent recently took place in Las Vegas. As anticipated, AI was a significant focus of the keynotes, but the community was more intrigued by announcements in the serverless space, including Lambda Managed Instances and Lambda Durable Functions. The conference marked the final keynote for Amazon CTO Werner Vogels after 14 years.
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AWS Introduces Durable Functions: Stateful Logic Directly in Lambda Code
AWS has unveiled Durable Functions for Lambda, revolutionizing multi-step workflows. This feature allows developers to write code that manages state and retry logic without incurring costs during waits. With advanced capabilities like checkpoints, pauses for up to a year, and simplified orchestration, Durable Functions streamline complex serverless applications.
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AWS Lambda Rust Support Reaches General Availability
AWS has elevated Rust support in Lambda from experimental to generally available, empowering developers to create high-performance, memory-safe serverless applications. This milestone enhances developer confidence, backed by AWS support and SLA. While it offers speed comparable to C++, challenges such as lengthy SDK compile times and increased binary sizes remain key considerations.
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AWS Lambda Response Streaming Increases Payload Limit to 200 MB
AWS has revolutionized Lambda with an increased response streaming payload limit from 20 MB to 200 MB. This enhancement allows developers to stream larger data sets, improving Time to First Byte performance. By simplifying response handling and eliminating complex workarounds, AWS empowers developers to deliver rich content seamlessly, transforming serverless applications.
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AWS Lambda Adds Support for GitHub Actions
AWS has recently announced that AWS Lambda now supports GitHub Actions, providing a simplified way to deploy changes to Lambda functions using declarative configuration in GitHub Actions workflows. The new option supports both .zip file and container image deployments.