RELEASE.CHANGELOG.md

September 2, 2026

2.12.1

• Emit a structured runtime_worker_pool_initializing DEBUG log event once during INIT in multi-concurrent (Lambda Managed Instances) mode, reporting the worker pool size (workerCount) and the maximum concurrency the execution environment supports (executionEnvironmentMaxConcurrency). Only visible when the function log level is DEBUG or lower; not emitted for standard on-demand functions.

July 17, 2026

2.12.0

• Add Lambda-Runtime-Invocation-Id header support for cross-wiring protection. The RIC now echoes the invocation ID received from RAPID on /next back on /response and /error, enabling RAPID to detect and reject stale responses from timed-out invocations.

May 13, 2026

2.11.0

• Update aws-lambda-java-serialization dependency to 1.4.1

March 19, 2026

2.10.1

• Revert aws-lambda-java-serialization dependency to 1.2.0

March 12, 2026

2.10.0

• Update aws-lambda-java-serialization dependency to 1.3.0

March 12, 2026

2.9.0

• Update aws-lambda-java-serialization dependency to 1.2.0

September 22, 2025

2.8.7

• Remove Minimum and Maximum Limits of AWS_LAMBDA_MAX_CONCURRENCY.

September 22, 2025

2.8.6

• Set Multiconcurrent Trace ID using utils-lite.

September 17, 2025

2.8.5

• Log errorType and errorMessage from RAPID in C++ Client.
• Performance Upgrade for Multiconcurrency Mode.

September 9, 2025

2.8.4

• Make Trace ID Accessible through Context Object.

July 19, 2025

2.8.3

• Ensure EventHandlerLoader Thread Safety.

June 26, 2025

2.8.2

• Allow AWS_LAMBDA_MAX_CONCURRENCY to be One. Crash the RIC if it is set to an un-parsable string to an integer or an out of bounds value.

June 26, 2025

2.8.1

• Refactoring

June 26, 2025

2.8.0

• Refactoring

May 21, 2025

2.7.0

• Adding support for multi tenancy (#540)

August 7, 2024

2.6.0

• Runtime API client improvements: use Lambda-Runtime-Function-Error-Type for reporting errors in format "Runtime."

June 28, 2024

2.5.1

• Runtime API client improvements: fix a DNS cache issue
• Runtime API client improvements: fix circular exception references causing stackOverflow

March 20, 2024

2.5.0

• Runtime API client improvements (#471)

February 27, 2024

2.4.2

• Exceptions caught by the runtime are logged as ERROR in JSON mode

September 4, 2023

2.4.1

• Null pointer bugfix (#439)

August 29, 2023

2.4.0

• Logging improvements (#436)

July 17, 2023

2.3.3

• Build platform specific JAR files
• NativeClient optimisations

April 14, 2023

2.3.2

• Add curl patch

March 16, 2023

2.3.1

• ignore module-info for CDS preparation purposes
• clear thread interrupted flag instead of exiting Lambda Runtime

March 14, 2023

2.3.0

• added CRaC context implementation
• added runtime hooks execution logic
• updated serialisation dependency
• reduced Reflection API usage

February 3, 2023

2.2.0

• Added timestamps to TLV
• Removed legacy init method support
• libcurl updated to version 7.86
• Support sockets as transport for framed telemetry
• Updated aws-lambda-java-core to 1.2.2

April 11, 2022

2.1.1

• fix: Re-build of the x86_64/aarch64 artifacts

January 20, 2022

2.1.0

• fix: Added support for ARM64 architecture

Sept 29, 2021

2.0.0

• Added support for ARM64 architecture

June 02, 2021

1.1.0:

• Added reserved environment variables constants (#238)
• Updated libcurl dependency to 7.77.0 (#249)

December 01, 2020

1.0.0:

• Initial release of AWS Lambda Java Runtime Interface Client