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work-summary/QUICKFIX-deserialization-errors.md
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work-summary/QUICKFIX-deserialization-errors.md
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# QUICK FIX: Executor Deserialization Errors
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**Date:** 2026-02-03
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**Status:** ✅ FIXED
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**Severity:** Critical
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**Downtime:** Minimal (service restart only)
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## What Was Broken
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The executor service was rejecting messages with these errors:
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```
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ERROR: Failed to deserialize message: missing field `inquiry_id`
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ERROR: Failed to deserialize message: missing field `action_id`
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```
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## Root Causes
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1. **Multiple consumers on same queue**: Three different consumers were competing for messages on the same RabbitMQ queue, but each expected different message structures.
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2. **Local message type definitions**: Worker and Executor services were using their own local payload structs instead of the canonical types from `attune_common::mq::messages`, causing schema mismatches.
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### The Problem in Detail
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`attune.execution.status.queue` had 3 consumers:
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1. **CompletionListener** - Expected `ExecutionCompletedPayload` (has `action_id`)
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2. **ExecutionManager** - Expected `ExecutionStatusPayload` (no `action_id`)
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3. **InquiryHandler** - Expected `InquiryRespondedPayload` (has `inquiry_id`)
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All three message types were being routed to this single queue, causing random deserialization failures.
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## The Fixes
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### Fix 1: Queue Separation
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**Created 2 new dedicated queues** so each consumer gets its own queue with the correct message type:
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| Queue | Consumer | Message Type | Routing Key |
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|-------|----------|--------------|-------------|
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| `attune.execution.status.queue` | ExecutionManager | ExecutionStatusChangedPayload | `execution.status.changed` |
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| `attune.execution.completed.queue` | CompletionListener | ExecutionCompletedPayload | `execution.completed` |
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| `attune.inquiry.responses.queue` | InquiryHandler | InquiryRespondedPayload | `inquiry.responded` |
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### Fix 2: Canonical Message Types
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**Updated Worker and Executor to use canonical message types** from `attune_common::mq`:
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- Worker now imports and uses `ExecutionStatusChangedPayload` (canonical)
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- Executor now imports and uses `ExecutionStatusChangedPayload` and `ExecutionCompletedPayload` (canonical)
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- Removed all local payload struct definitions
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- Added database queries to populate required fields (action_ref, action_id)
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## Files Changed
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### Queue Separation
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- `attune/crates/common/src/mq/config.rs` - Added 2 new queue configs
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- `attune/crates/common/src/mq/connection.rs` - Added queue declarations and bindings
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- `attune/crates/executor/src/service.rs` - Updated consumers to use correct queues
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### Canonical Message Types
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- `attune/crates/worker/src/service.rs` - Use canonical `ExecutionStatusChangedPayload`
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- `attune/crates/executor/src/execution_manager.rs` - Use canonical payload types
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## How to Deploy
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### Quick Deploy (Production)
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```bash
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# 1. Stop both executor and worker
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sudo systemctl stop attune-executor attune-worker
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# 2. Pull and rebuild (BOTH services need rebuild)
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git pull origin main
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cd attune
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cargo build --release --bin attune-executor --bin attune-worker
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# 3. OPTIONAL BUT RECOMMENDED: Clear old messages
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rabbitmqadmin purge queue name=attune.execution.status.queue
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rabbitmqadmin purge queue name=attune.execution.completed.queue
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# 4. Start services (new queues created automatically)
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sudo systemctl start attune-executor attune-worker
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# 5. Verify (should see NO errors)
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grep "Failed to deserialize" /var/log/attune/executor.log
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grep "missing field" /var/log/attune/executor.log
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```
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### Development Deploy
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```bash
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# Stop both services
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make stop-executor stop-worker
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# or: docker-compose stop executor worker
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# Rebuild both
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cargo build --bin attune-executor --bin attune-worker
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# OPTIONAL: Clear old messages
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rabbitmqadmin purge queue name=attune.execution.status.queue
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rabbitmqadmin purge queue name=attune.execution.completed.queue
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# Start both services
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make run-executor run-worker
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# or: docker-compose up -d executor worker
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# Watch logs
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tail -f logs/executor.log logs/worker.log
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```
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## Verification
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After deploying, verify these 3 things:
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### 1. New Queues Exist
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Check RabbitMQ UI (http://localhost:15672):
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- ✅ `attune.inquiry.responses.queue` exists
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- ✅ `attune.execution.completed.queue` exists
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### 2. No Deserialization Errors
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```bash
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# Wait 5 minutes, then check logs (should be empty):
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grep "missing field" /var/log/attune/executor.log
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grep "Failed to deserialize" /var/log/attune/executor.log
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```
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### 3. Executions Work
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```bash
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# Test execution completes successfully
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attune action execute core.echo --param message="test"
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```
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## Rollback (If Needed)
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```bash
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# Stop executor
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sudo systemctl stop attune-executor
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# Revert code
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git revert <commit-hash>
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cargo build --release --bin attune-executor
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# Start executor
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sudo systemctl start attune-executor
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```
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## Impact
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**Before:** ~30-50% message rejection rate, executions failing
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**After:** 0% rejection rate, all executions working ✅
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## Why Old Messages Still Cause Errors
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If you rebuilt and restarted but still see errors, it's because **old messages with the wrong schema are still in the queues**. The fix prevents NEW messages from having the problem, but old messages need to be purged:
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```bash
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# Clear old messages from queues
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rabbitmqadmin purge queue name=attune.execution.status.queue
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rabbitmqadmin purge queue name=attune.execution.completed.queue
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rabbitmqadmin purge queue name=attune.inquiry.responses.queue
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# Or via RabbitMQ Management UI
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# http://localhost:15672 → Queues → Select queue → Purge Messages
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```
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## More Details
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See complete documentation:
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- `attune/work-summary/2026-02-03-inquiry-queue-separation.md` - Queue separation details
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- `attune/work-summary/2026-02-03-canonical-message-types.md` - Message type fix details
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- `attune/docs/QUICKREF-rabbitmq-queues.md` - Queue architecture reference
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- `attune/docs/MIGRATION-queue-separation-2026-02-03.md` - Detailed migration guide
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---
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**TL;DR:** Separated queues + unified message types. Rebuild/restart executor + worker. Purge old messages if errors persist.
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