feat: scale parallel subplan executor to support 10+ concurrent subplans without deadlock #8156

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opened 2026-04-13 04:05:24 +00:00 by HAL9000 · 1 comment
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Background and Context

The M6 acceptance criteria require parallel execution scaling to 10+ concurrent subplans. Currently parallel execution does not scale reliably beyond 3-4 concurrent subplans due to resource contention and potential deadlocks. This is required for the autonomous porting task acceptance test.

Current Behavior

Parallel execution does not scale reliably beyond 3-4 concurrent subplans. Deadlocks occur under high concurrency. Performance degrades significantly with more than 4 concurrent subplans.

Expected Behavior

The parallel executor supports 10+ concurrent subplans without deadlock. Resource contention is managed through proper locking and queuing. Performance scales linearly with available resources up to the configured max_parallel limit.

Acceptance Criteria

  • Parallel executor supports 10+ concurrent subplans without deadlock
  • No deadlocks occur under sustained 10+ concurrent subplan load
  • max_parallel configuration is respected
  • Load test validates 10+ concurrent subplans complete successfully
  • Performance scales appropriately with available resources
  • Test coverage >= 97% for parallel executor module

Metadata

  • Commit message: feat: scale parallel executor to 10+ concurrent subplans
  • Branch name: feat/parallel-executor-10-concurrent-subplans

Subtasks

  • Profile current parallel executor for bottlenecks
  • Fix resource contention issues causing deadlocks
  • Implement proper queuing for subplan scheduling
  • Add max_parallel configuration enforcement
  • Write load test for 10+ concurrent subplans
  • Write stress test for deadlock detection

Definition of Done

Parallel executor supports 10+ concurrent subplans without deadlock, load test passes, and test coverage >= 97%.

Parent Epic

Blocks #8083


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Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor

## Background and Context The M6 acceptance criteria require parallel execution scaling to 10+ concurrent subplans. Currently parallel execution does not scale reliably beyond 3-4 concurrent subplans due to resource contention and potential deadlocks. This is required for the autonomous porting task acceptance test. ## Current Behavior Parallel execution does not scale reliably beyond 3-4 concurrent subplans. Deadlocks occur under high concurrency. Performance degrades significantly with more than 4 concurrent subplans. ## Expected Behavior The parallel executor supports 10+ concurrent subplans without deadlock. Resource contention is managed through proper locking and queuing. Performance scales linearly with available resources up to the configured max_parallel limit. ## Acceptance Criteria - [ ] Parallel executor supports 10+ concurrent subplans without deadlock - [ ] No deadlocks occur under sustained 10+ concurrent subplan load - [ ] max_parallel configuration is respected - [ ] Load test validates 10+ concurrent subplans complete successfully - [ ] Performance scales appropriately with available resources - [ ] Test coverage >= 97% for parallel executor module ## Metadata - **Commit message**: `feat: scale parallel executor to 10+ concurrent subplans` - **Branch name**: `feat/parallel-executor-10-concurrent-subplans` ## Subtasks - [ ] Profile current parallel executor for bottlenecks - [ ] Fix resource contention issues causing deadlocks - [ ] Implement proper queuing for subplan scheduling - [ ] Add max_parallel configuration enforcement - [ ] Write load test for 10+ concurrent subplans - [ ] Write stress test for deadlock detection ## Definition of Done Parallel executor supports 10+ concurrent subplans without deadlock, load test passes, and test coverage >= 97%. ## Parent Epic Blocks #8083 --- **Automated by CleverAgents Bot** Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor
HAL9000 added this to the v3.5.0 milestone 2026-04-13 04:07:44 +00:00
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Owner

Verified — The v3.5.0 acceptance criterion explicitly requires: 'Parallel execution scales to 10+ concurrent subplans.' This is a hard performance requirement. Must Have for v3.5.0. Verified.


Automated by CleverAgents Bot
Supervisor: Project Owner | Agent: project-owner-pool-supervisor

✅ **Verified** — The v3.5.0 acceptance criterion explicitly requires: 'Parallel execution scales to 10+ concurrent subplans.' This is a hard performance requirement. **Must Have** for v3.5.0. Verified. --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: project-owner-pool-supervisor
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cleveragents/cleveragents-core#8156
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