# Work Summary: Critical Fixes for Timer-Driven Execution Pipeline **Date:** 2026-01-16 **Status:** COMPLETED ✅ --- ## Overview Fixed two P0 blocking issues that prevented the timer-driven automation pipeline from completing end-to-end: 1. **Message Loop Bug** - Execution manager processing completion messages infinitely 2. **Worker Runtime Resolution** - Worker unable to find correct runtime for actions Both issues are now resolved, and executions complete successfully with the correct runtime. --- ## Issue 1: Message Loop in Execution Manager ### Problem Execution manager entered an infinite loop where `ExecutionCompleted` messages were routed back to the status queue and reprocessed indefinitely. **Symptoms:** ``` INFO Processing status change for execution 137: Failed INFO Updated execution 137 status: Failed -> Failed INFO Handling completion for execution: 137 INFO Published execution.completed notification for execution: 137 [repeats infinitely] ``` ### Root Cause The execution manager's queue was bound with wildcard pattern `execution.status.#` which matched: - `execution.status.changed` ✅ (intended) - `execution.completed` ❌ (unintended - caused loop) When an execution completed, the manager published an `ExecutionCompleted` message with routing key `execution.completed`. This message was routed back to the same queue due to the wildcard pattern, causing infinite reprocessing. ### Solution Changed queue binding in `common/src/mq/connection.rs` from wildcard to exact match: ```rust // Before self.bind_queue( &config.rabbitmq.queues.execution_status.name, &config.rabbitmq.exchanges.executions.name, "execution.status.#", // Matches ALL execution.status.* messages ) // After self.bind_queue( &config.rabbitmq.queues.execution_status.name, &config.rabbitmq.exchanges.executions.name, "execution.status.changed", // Only matches status change messages ) ``` ### Files Modified - `crates/common/src/mq/connection.rs` - Line 407 ### Result ✅ ExecutionCompleted messages no longer route to status queue ✅ Manager processes each status change exactly once ✅ No more infinite loops --- ## Issue 2: Worker Runtime Resolution Failure ### Problem Worker received execution messages but failed with: ``` ERROR Runtime not found: No runtime found for action: core.echo ``` Even though: - Worker had shell runtime available ✅ - Action `core.echo` requires shell runtime ✅ - Runtime matching logic existed ✅ ### Root Cause The worker's runtime selection relied on `can_execute()` methods that checked file extensions and action_ref patterns: - Python runtime checked for `.py` in action_ref - Shell runtime checked for specific patterns - `core.echo` didn't match any patterns The action's runtime metadata (stored in database as `runtime: 3` → shell runtime) was being ignored. ### Solution Architecture **1. Added `runtime_name` field to `ExecutionContext`** ```rust pub struct ExecutionContext { // ... existing fields pub runtime_name: Option, // NEW: "python", "shell", etc. } ``` **2. Updated worker executor to load runtime from database** ```rust // Load runtime information if specified let runtime_name = if let Some(runtime_id) = action.runtime { match sqlx::query_as::<_, RuntimeModel>("SELECT * FROM attune.runtime WHERE id = $1") .bind(runtime_id) .fetch_optional(&self.pool) .await { Ok(Some(runtime)) => { debug!("Loaded runtime '{}' for action '{}'", runtime.name, action.r#ref); Some(runtime.name) } // ... error handling } } else { None }; ``` **3. Updated `RuntimeRegistry::get_runtime()` to prefer runtime_name** ```rust pub fn get_runtime(&self, context: &ExecutionContext) -> RuntimeResult<&dyn Runtime> { // If runtime_name is specified, use it directly (no guessing!) if let Some(ref runtime_name) = context.runtime_name { return self .runtimes .iter() .find(|r| r.name() == runtime_name) .map(|r| r.as_ref()) .ok_or_else(|| { RuntimeError::RuntimeNotFound(format!( "Runtime '{}' not found (available: {})", runtime_name, self.list_runtimes().join(", ") )) }); } // Fall back to can_execute() for ad-hoc executions self.runtimes .iter() .find(|r| r.can_execute(context)) .map(|r| r.as_ref()) .ok_or_else(|| RuntimeError::RuntimeNotFound(...)) } ``` **4. Updated worker to register individual runtimes** ```rust // Register individual runtimes so they can be matched by name runtime_registry.register(Box::new(PythonRuntime::new())); runtime_registry.register(Box::new(ShellRuntime::new())); // Also keep local runtime as fallback runtime_registry.register(Box::new(LocalRuntime::new())); ``` ### Files Modified - `crates/worker/src/runtime/mod.rs` - Added runtime_name field, updated get_runtime() - `crates/worker/src/executor.rs` - Load runtime from database, populate runtime_name - `crates/worker/src/service.rs` - Register individual Python/Shell runtimes - Test files updated to include new field: - `crates/worker/src/runtime/python.rs` - `crates/worker/src/runtime/shell.rs` - `crates/worker/src/runtime/local.rs` ### Result ✅ Worker correctly identifies runtime from database metadata ✅ Runtime selection based on authoritative data, not pattern matching ✅ Backward compatible with can_execute() for ad-hoc executions ✅ Actions execute successfully with correct runtime --- ## Verification ### Test Execution (Execution ID 180) ``` 2026-01-16T04:01:08.319898Z INFO Starting execution: 180 2026-01-16T04:01:08.326189Z INFO Executing shell action: core.echo (execution_id: 180) 2026-01-16T04:01:08.328574Z INFO Execution 180 succeeded 2026-01-16T04:01:08.330727Z INFO Execution 180 completed successfully in 2ms ``` ### Database State ```sql SELECT id, status FROM attune.execution WHERE id >= 177; id | status -----+----------- 182 | completed 181 | completed 180 | completed 179 | completed 178 | completed ``` ### Runtime Registration ``` 2026-01-16T04:00:46.998849Z INFO Registered runtimes: ["python", "shell", "local"] ``` --- ## Architecture Improvements ### Before ``` Action (core.echo) └─> Worker receives execution └─> RuntimeRegistry.get_runtime() └─> Check can_execute() on each runtime └─> PythonRuntime.can_execute() → ❌ (no .py) └─> ShellRuntime.can_execute() → ❌ (no pattern match) └─> ERROR: Runtime not found ``` ### After ``` Action (core.echo, runtime_id: 3) └─> Worker loads action from database └─> Query runtime table: runtime_id=3 → name="shell" └─> ExecutionContext { runtime_name: Some("shell"), ... } └─> RuntimeRegistry.get_runtime() └─> Direct name match: "shell" → ShellRuntime ✅ └─> SUCCESS: Execute with shell runtime ``` --- ## Impact ### Immediate Benefits 1. **End-to-end timer pipeline works** - Events trigger actions successfully 2. **Reliable runtime selection** - Based on database metadata, not heuristics 3. **No more infinite loops** - Execution manager processes messages correctly 4. **Fast execution** - Shell actions complete in ~2-3ms ### System Status - ✅ Sensor: Firing timer events every 10 seconds - ✅ Executor: Processing enforcements, scheduling executions - ✅ Worker: Executing actions with correct runtime - ✅ End-to-end: Timer → Event → Rule → Enforcement → Execution → Completion --- ## Known Issues ### Message Re-delivery Executions are being processed multiple times due to message acknowledgment issues. This is a separate concern from the fixed issues and does not prevent successful execution. **Example:** ``` Processing execution.scheduled for execution: 180 Starting execution: 180 Execution 180 completed successfully Processing execution.scheduled for execution: 180 # Re-delivered Starting execution: 180 Execution 180 completed successfully ``` **Impact:** Minor - Executions still complete successfully, just with redundant processing. **Next Steps:** Investigate message acknowledgment in worker consumer to ensure proper ACK/NACK handling. --- ## Testing Recommendations ### Manual Testing ```bash # 1. Start all services ./target/debug/attune-sensor -c config.development.yaml & ./target/debug/attune-executor -c config.development.yaml & ./target/debug/attune-worker -c config.development.yaml & # 2. Monitor logs tail -f /tmp/sensor.log | grep "Timer.*fired" tail -f /tmp/executor.log | grep "Execution.*scheduled" tail -f /tmp/worker.log | grep "completed successfully" # 3. Check database psql -U postgres -h localhost -d attune \ -c "SELECT id, status, action_ref FROM attune.execution ORDER BY id DESC LIMIT 10;" ``` ### Integration Tests - Test timer events trigger executions - Test Python actions (verify python runtime) - Test shell actions (verify shell runtime) - Test execution lifecycle transitions - Test message routing (no loops, no duplicate processing) --- ## Configuration Note Added message queue configuration to `config.development.yaml`: ```yaml message_queue: url: amqp://guest:guest@localhost:5672 ``` This was missing and caused sensor/executor/worker to fail on startup in development environment. --- ## Summary Both P0 blocking issues are **RESOLVED**: 1. ✅ Message loop fixed via queue binding change 2. ✅ Runtime resolution fixed via database-driven selection The timer-driven automation pipeline now works end-to-end: ``` Timer (10s) → Event → Rule Match → Enforcement → Execution → Worker (shell) → Completion (2-3ms) ``` **Next Priority:** Address message re-delivery issue to eliminate redundant processing.