[sudo-sys] Re: Cron <www-data@sudoroom> [ -f /usr/bin/django-admin ] && flock -n /var/run/mailman3-web/cron.monthly /usr/share/mailman3-web/manage.py runjobs monthly

I ran the error through ChatGPT, output: Analysis of Error in Job `update_and_clean_index` for `hyperkitty`: Error Details: - Job: `update_and_clean_index` - Application: `hyperkitty` - Error: `flufl.lock._lockfile.NotLockedError: Already unlocked` - Description: The error occurs because the lock mechanism attempts to unlock a resource that is already unlocked. This may happen if there is an attempt to unlock twice or if the lock was never properly acquired in the first place. --- Possible Causes: 1. Concurrency Issues: Multiple instances of the job might be running simultaneously, causing one instance to attempt to unlock a resource already unlocked by another instance. 2. Improper Lock Handling: The code may not be managing the lock state correctly. For example, an exception between acquiring and releasing the lock might leave the lock state inconsistent. 3. Race Conditions: A race condition could be causing the lock state to change unexpectedly by another process or thread. 4. File System Issues: If the lock file is stored on a network file system (like NFS), synchronization or latency issues might cause the lock state to be reported incorrectly. --- Suggested Actions: 1. Review Job Scheduling and Concurrency Controls: Ensure that multiple instances of the job are not running concurrently. Use a locking mechanism that guarantees exclusive access. 2. Improve Lock Handling in Code: Ensure the code correctly handles exceptions and edge cases around acquiring and releasing locks. Use a `try...finally` block or context manager (`with` statement) to ensure that locks are always properly released. 3. Check Lock File Location and File System: Ensure that the lock file is located on a file system that supports proper locking semantics (avoid network file systems like NFS if possible). 4. Enable Detailed Logging: Add more detailed logging around the locking mechanism to better understand when and why the lock state is changing. On Sun, Sep 1, 2024 at 11:02 AM Cron Daemon via sudo-sys < sudo-sys(a)sudoroom.org&gt; wrote: