Shared TaskPublic
Design and implement an enhanced TimeoutHandler class for AWS Lambda timeout detection with state preservation capabilities. Based on the current implementation in src/optimized/processors/chunk_processor.py (lines 71-90) and the comprehensive research on Lambda timeout detection best practices, create an enhanced version with the following requirements: ## Task Context This is Task 3 from the data-pipeline-enhancements project: "Enhanced Chunk Processor Timeout Detection". The current TimeoutHandler has basic timeout detection with a 15-second buffer. We need to upgrade it to detect approaching Lambda timeout (30-second configurable threshold) and prepare for successor spawning with state preservation. ## Current Implementation Analysis The existing TimeoutHandler class (lines 71-90) has: - Basic timeout detection using context.get_remaining_time_in_millis() - Simple should_continue() method with configurable buffer (default 15 seconds) - No state preservation or successor preparation capabilities ## Enhanced Requirements 1. **Timeout Detection**: Use AWS Lambda Context object with 30-second configurable threshold 2. **State Preservation**: Implement state snapshot mechanisms using Protocol Buffers or MessagePack 3. **CloudWatch Metrics**: Custom metrics for timeout events using EMF format 4. **X-Ray Tracing**: Distributed tracing for Lambda handoffs 5. **Circuit Breaker**: Failure handling patterns for robust operation ## Key Methods to Implement - `should_spawn_successor()`: Determine if timeout is approaching - `create_continuation_payload()`: Prepare state for handoff - `emit_timeout_metrics()`: CloudWatch metrics emission - `prepare_xray_context()`: X-Ray tracing setup ## Technical Specifications - Use context.get_remaining_time_in_millis() for accurate timing - 30-second default threshold (configurable) - Support for dynamic threshold adjustment based on state size - Integration with existing chunk processor workflow - Comprehensive error handling and logging ## Integration Requirements - Must work with existing ChunkProcessor class - Should integrate with TimestampExtractor and ResultAggregator - Preserve all current functionality while adding enhancements - Maintain backward compatibility ## Implementation Approach 1. Extend the current TimeoutHandler class (don't replace it completely) 2. Add new methods for enhanced functionality 3. Update the constructor to support new configuration options 4. Implement state serialization mechanisms 5. Add CloudWatch and X-Ray integration Focus solely on timeout detection and state preparation for handoff. Do not implement successor spawning (that's Task 4). Create the enhanced class and update the existing chunk processor to use it. Include comprehensive error handling and logging throughout the implementation. Use the research findings on Protocol Buffers vs MessagePack, circuit breaker patterns, and X-Ray tracing to guide the implementation. Signal completion using attempt_completion with a detailed summary of what was implemented.

Shared by Brandon Peterson • 7/23/2025

IncompleteShared

Developer

Brandon Peterson

Mode

code

Git Workspace

bpeterson1991/avesa

Date

7/23/2025, 1:10:29 PM

Model

claude-sonnet-4-20250514

Provider

claude-code

Tokens

819.0K

Cost

$0.00

Conversation
User
·
7/23/2025, 1:10:29 PM
·
code

Design and implement an enhanced TimeoutHandler class for AWS Lambda timeout detection with state preservation capabilities. Based on the current implementation in src/optimized/processors/chunk_processor.py (lines 71-90) and the comprehensive research on Lambda timeout detection best practices, create an enhanced version with the following requirements:

Task Context

This is Task 3 from the data-pipeline-enhancements project: "Enhanced Chunk Processor Timeout Detection". The current TimeoutHandler has basic timeout detection with a 15-second buffer. We need to upgrade it to detect approaching Lambda timeout (30-second configurable threshold) and prepare for successor spawning with state preservation.

Current Implementation Analysis

The existing TimeoutHandler class (lines 71-90) has:

  • Basic timeout detection using context.get_remaining_time_in_millis()
  • Simple should_continue() method with configurable buffer (default 15 seconds)
  • No state preservation or successor preparation capabilities

Enhanced Requirements

  1. Timeout Detection: Use AWS Lambda Context object with 30-second configurable threshold
  2. State Preservation: Implement state snapshot mechanisms using Protocol Buffers or MessagePack
  3. CloudWatch Metrics: Custom metrics for timeout events using EMF format
  4. X-Ray Tracing: Distributed tracing for Lambda handoffs
  5. Circuit Breaker: Failure handling patterns for robust operation

Key Methods to Implement

  • should_spawn_successor(): Determine if timeout is approaching
  • create_continuation_payload(): Prepare state for handoff
  • emit_timeout_metrics(): CloudWatch metrics emission
  • prepare_xray_context(): X-Ray tracing setup

Technical Specifications

  • Use context.get_remaining_time_in_millis() for accurate timing
  • 30-second default threshold (configurable)
  • Support for dynamic threshold adjustment based on state size
  • Integration with existing chunk processor workflow
  • Comprehensive error handling and logging

Integration Requirements

  • Must work with existing ChunkProcessor class
  • Should integrate with TimestampExtractor and ResultAggregator
  • Preserve all current functionality while adding enhancements
  • Maintain backward compatibility

Implementation Approach

  1. Extend the current TimeoutHandler class (don't replace it completely)
  2. Add new methods for enhanced functionality
  3. Update the constructor to support new configuration options
  4. Implement state serialization mechanisms
  5. Add CloudWatch and X-Ray integration

Focus solely on timeout detection and state preparation for handoff. Do not implement successor spawning (that's Task 4). Create the enhanced class and update the existing chunk processor to use it. Include comprehensive error handling and logging throughout the implementation.

Use the research findings on Protocol Buffers vs MessagePack, circuit breaker patterns, and X-Ray tracing to guide the implementation. Signal completion using attempt_completion with a detailed summary of what was implemented.

Roo Code
·
7/23/2025, 1:10:42 PM
·
code

I need to analyze the current TimeoutHandler implementation and design an enhanced version. Let me start by examining the current code and creating a todo list for this complex task.

Read src/optimized/processors/chunk_processor.py
●Create comprehensive todo list for enhanced TimeoutHandler implementation

Now I need to research the enhanced TimeoutHandler architecture requirements and read any related task documentation. Let me examine the PRD and research the specific requirements.

Read 2 files (.taskmaster/docs/data-pipeline-enhancements-prd.txt, ...)
●Research and design enhanced TimeoutHandler architecture

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Created src/optimized/processors/enhanced_timeout_handler.py
Roo Code
·
7/23/2025, 2:27:40 PM
·
code

I can see that my previous write operation was interrupted and the file was reverted. I can see that src/optimized/processors/enhanced_timeout_handler.py is now in the open tabs, so it seems a partial file was created. Let me continue implementing the enhanced TimeoutHandler by completing the file that was started.

Read src/optimized/processors/enhanced_timeout_handler.py

{"type":"assistant","message":{"id":"msg_01VG4qUfknu4Rz3BgxwhgVyv","type":"message","role":"assistant","model":"claude-sonnet-4-20250514","content":[{"type":"text","text":"I can see that the file was partially created but truncated. The file contains the first part of the enhanced timeout handler implementation. I need to complete the file by adding the remaining methods. Let me continue from where it left off.\n\n

Edited src/optimized/processors/enhanced_timeout_handler.py

{"type":"assistant","message":{"id":"msg_01CNZWq95L7TqB4BbZK9eU5V","type":"message","role":"assistant","model":"claude-sonnet-4-20250514","content":[{"type":"text","text":"I see there are syntax errors in the file. The issue seems to be with escape characters. Let me fix the file by completing it properly without syntax errors.\n\n

Shared Task: Design and implement an enhanced TimeoutHandler class for AWS Lambda timeout detection with state preservation capabilities. Based on the current implementation in src/optimized/processors/chunk_processor.py (lines 71-90) and the comprehensive research on Lambda timeout detection best practices, create an enhanced version with the following requirements: ## Task Context This is Task 3 from the data-pipeline-enhancements project: "Enhanced Chunk Processor Timeout Detection". The current TimeoutHandler has basic timeout detection with a 15-second buffer. We need to upgrade it to detect approaching Lambda timeout (30-second configurable threshold) and prepare for successor spawning with state preservation. ## Current Implementation Analysis The existing TimeoutHandler class (lines 71-90) has: - Basic timeout detection using context.get_remaining_time_in_millis() - Simple should_continue() method with configurable buffer (default 15 seconds) - No state preservation or successor preparation capabilities ## Enhanced Requirements 1. **Timeout Detection**: Use AWS Lambda Context object with 30-second configurable threshold 2. **State Preservation**: Implement state snapshot mechanisms using Protocol Buffers or MessagePack 3. **CloudWatch Metrics**: Custom metrics for timeout events using EMF format 4. **X-Ray Tracing**: Distributed tracing for Lambda handoffs 5. **Circuit Breaker**: Failure handling patterns for robust operation ## Key Methods to Implement - `should_spawn_successor()`: Determine if timeout is approaching - `create_continuation_payload()`: Prepare state for handoff - `emit_timeout_metrics()`: CloudWatch metrics emission - `prepare_xray_context()`: X-Ray tracing setup ## Technical Specifications - Use context.get_remaining_time_in_millis() for accurate timing - 30-second default threshold (configurable) - Support for dynamic threshold adjustment based on state size - Integration with existing chunk processor workflow - Comprehensive error handling and logging ## Integration Requirements - Must work with existing ChunkProcessor class - Should integrate with TimestampExtractor and ResultAggregator - Preserve all current functionality while adding enhancements - Maintain backward compatibility ## Implementation Approach 1. Extend the current TimeoutHandler class (don't replace it completely) 2. Add new methods for enhanced functionality 3. Update the constructor to support new configuration options 4. Implement state serialization mechanisms 5. Add CloudWatch and X-Ray integration Focus solely on timeout detection and state preparation for handoff. Do not implement successor spawning (that's Task 4). Create the enhanced class and update the existing chunk processor to use it. Include comprehensive error handling and logging throughout the implementation. Use the research findings on Protocol Buffers vs MessagePack, circuit breaker patterns, and X-Ray tracing to guide the implementation. Signal completion using attempt_completion with a detailed summary of what was implemented.