openclaw - 💡(How to fix) Fix SessionWriteLockTimeoutError: long LLM turns block incoming system events (Wren/cron updates lost) [1 comments, 2 participants]

SessionWriteLockTimeoutError: session file locked (timeout 10000ms): pid=3447 /Users/page/.openclaw/agents/nova/sessions/f6bf05fa-f292-4f94-8fc1-d89d7f34d74b.jsonl.lock lane task error: lane=main durationMs=14610 error="SessionWriteLockTimeoutError: ..." lane task error: lane=session:agent:nova:main durationMs=14614 error="SessionWriteLockTimeoutError: ..."

TL;DR

Implement a queuing mechanism for incoming system events during an active write-lock or increase the lock timeout to prevent SessionWriteLockTimeoutError.

Guidance

• Investigate the feasibility of implementing a message queue to hold incoming system events until the write-lock is released, ensuring that no messages are lost.
• Consider increasing the lock timeout value to a longer duration to accommodate multi-agent workflows, but be aware that this may introduce other performance issues.
• Review the current workflow and tool calls within the long-running agent turn to identify potential optimizations that could reduce the overall execution time.
• Evaluate the use of a more robust locking mechanism that allows for concurrent access or provides a callback for pending requests.

Example

No specific code example can be provided without further details on the implementation, but a basic queuing mechanism could involve using a library like bull in Node.js to handle message queues.

Notes

The current implementation lacks a queuing mechanism, leading to lost messages during long-running agent turns. Any solution should consider the trade-offs between message delivery guarantees, performance, and complexity.

Recommendation

Apply a workaround by implementing a queuing mechanism for incoming system events, as increasing the lock timeout may not be sufficient for all scenarios and could lead to other issues. This approach ensures that messages are not lost and provides a more robust solution for handling concurrent access.