Debugging Weblate

バグは、アプリケーションのクラッシュまたは不正行為として現れることがあります。このような問題に関する情報を収集し、課題解決ツール で報告してください。


Turning on debug mode will make the exceptions show in the browser. This is useful to debug issues in the web interface, but not suitable for production environment as it has performance consequences and might leak private data.

Weblate logs

Weblate can produce detailed logs of what is going in the background. In the default configuration it uses syslog and that makes the log appear either in /var/log/messages or /var/log/syslog (depending on your syslog daemon configuration).

The Celery process (see Celery を使用するバックグラウンド タスク) usually produces own logs as well. The example system-wide setups log to several files under /var/log/celery/.

Docker containers log to their output (as usual in the Docker world), so you can look at the logs using docker-compose logs.


設定例 contains LOGGING configuration.

Not processing background tasks

Lot of things happen in background Celery workers. In case things like sending out e-mails or component removal does not work, there might be some issue with it.


Not receiving e-mails from Weblate

You can verify whether outgoing e-mail is working correctly by using the sendtestemail management command (see Invoking management commands for instructions on how to invoke it in different environments) or using 管理画面 under the Tools tab.

These send e-mail directly, so this verifies that your SMTP configuration is correct (see メール送信の設定). Most of the e-mails from Weblate are however sent in the background and there might be some issues with Celery involved as well, please see Not processing background tasks for debugging that.

Analyzing application crashes

In case the application crashes, it is useful to collect as much info about the crash as possible. The easiest way to achieve this is by using third-party services which can collect such info automatically. You can find info on how to set this up in エラー レポートの収集.

Silent failures

Lots of tasks are offloaded to Celery for background processing. Failures are not shown in the user interface, but appear in the Celery logs. Configuring エラー レポートの収集 helps you to notice such failures easier.

Performance issues

In case Weblate performs badly in some situation, please collect the relevant logs showing the issue, and anything that might help figuring out where the code might be improved.

In case some requests take too long without any indication, you might want to install dogslow along with エラー レポートの収集 and get pinpointed and detailed tracebacks in the error collection tool.