Lambda-Extension release notesRSS

Notes

• Java runtime support improvements - automatic detection and proper mode routing

• Enhanced log processing reliability - ensures all logs are properly tagged before sending

• Reduced resource usage by optimizing channel creation

• Improved log processing efficiency

Fixed

• Java agent version reporting

• Log metadata stamping for pre-invoke logs

• Unnecessary warning messages in APM mode

Notes

• Configuration: Add support for NEW_RELIC_EXTENSION_SEND_PLATFORM_LOGS Environment variable

• Metadata: Add tags to entity for Extension version and Agent version

• Logging: Change secondary Log level to DEBUG

Fixed

• Runtime Detection: Enhance runtime detection logic for improved agent compatibility

• Telemetry: Implement global fallback ARN handling across telemetry components

• Validation: Update code for additional checks

Notes

• Implemented pre-invoke log buffering with metadata validation and fallback ARN support

• Removed debug log for buffering in pre-invoke buffer

• Added fallback code for Aws-arn

Fixed

• Remove License key exposure from CloudWatch logs

Notes

• Improved panic handling in main function to ensure Lambda continue

• Added new telemetry buffer for APM mode and Shutdown logs

• Enhanced versioning support and logging in APM mode

Fixed

• Updated platform report line to send as json instead of compressed

• EU endpoint detection for license keys fetched from SSM/Secrets Manager

Notes

• Removed unnecessary trace logging for skipped Function and Extension logs.

• Updated parsing logic to scan the first 50 characters instead of a 100-byte slice. Ensuring safe handling of multi-byte UTF-8 characters (like emojis) without truncation errors.

Fixed

• Resolved an issue where requests were occasionally not instrumented in APM mode.

• Enabled automatic NEW_RELIC_LICENSE_KEY fallback.

Major Release: Rust Rewrite

Complete rewrite of the New Relic Lambda Extension from Go (v2.3.24) to Rust for improved performance, memory safety, and reduced cold start times.

New Features

• APM Mode Support: Lambda functions can now report directly to New Relic APM platform as application entities

  • Enable with NEW_RELIC_APM_LAMBDA_MODE=true
  • Full support for metrics, spans, errors, events, and transaction traces
  • Platform logs converted to APM metrics (apm.lambda.transaction.*)
  • Enhanced error events for timeouts and faults with distributed tracing context
  • See APM Mode Documentation for details

• Request-Scoped Processing: Improved payload correlation and lifecycle management

• Intelligent Buffer Management: Handles agent payloads that arrive before request context with automatic cleanup

Performance Improvements

• Faster Cold Starts: Optimized Rust compilation with minimal dependencies and LTO
• Lower Memory Usage: Reduced memory footprint with zero-cost abstractions
• Concurrent Processing: Parallel processing of logs, platform metrics, and agent telemetry
• Connection Pooling: HTTP client connection reuse across invocations

Security & Reliability

• Memory Safety: Rust's ownership system prevents memory leaks and buffer overflows
• Panic Safety: Global panic handler prevents Lambda crashes from extension failures
• Type Safety: Compile-time guarantees eliminate entire classes of runtime errors

Technical Changes

• Migrated from Go v1.23 to Rust 2021 edition
• Built on Tokio async runtime
• AWS SDK v1 for Rust (aws-config 1.8, aws-sdk-secretsmanager 1.88, aws-sdk-ssm 1.93)
• Modular architecture with clean separation of concerns

Configuration

All existing environment variables remain unchanged for backwards compatibility. Key variables:

• NEW_RELIC_LICENSE_KEY: New Relic license key
• NEW_RELIC_APM_LAMBDA_MODE: Enable APM mode (default: false)
• NEW_RELIC_EXTENSION_SEND_FUNCTION_LOGS: Send function logs (default: false)
• NEW_RELIC_LAMBDA_LOG_LEVEL: Extension log level supports more granular control with info, debug, warn, error, trace, all

Full configuration details in the README.

Migration Notes

• Drop-in Replacement: No code changes required for existing users
• Environment Variables: All configuration remains the same
• Binary Compatibility: Maintains compatibility with existing New Relic agents
• Performance: Expect 20-40% faster cold starts and lower memory usage

[2.3.24] - Go Implementation (Legacy)

Last Go-based version before Rust migration. Maintained for reference and legacy support.

Fixed

• Updated Go std lib version to 1.23.12 to resolve CVE-2025-47907
• APM Mode: Resolved license key issue with SM/SSM in APM Mode & resolved log prefix

New feature

• Added Log Level Prefix DEBUG and INFO to the existing prefix [NR_EXT]
• APM Mode: Added tags to APM Mode
• APM Mode: Added Lambda ARN to host for APM connect
• APM Mode: Updated backoff duration for NEW_RELIC_HOST
• APM Mode: Refactor APM error event data
• APM Mode: Added ruby support

Notes

• Added option to build nodejs test Layers for local testing

Fixed

• Updated AWS SDK and Go Version to address Security Vulnerabilities [CVE-2020-8911, CVE-2020-8912, CVE-2025-0913, CVE-2025-4673]

Notes

• Added APM connect retry logic
• Added godebug to resolve AWS Firewall issue
• Added requestId extraction from logs for Node.js runtime

Fixed

• Updated Readme for --enable-license-key-secret