| --- | |
| id: functions-debug-stderr | |
| title: Debug with captured stderr | |
| sidebar_label: "Debug with captured stderr" | |
| description: Debug functions with captured stderr in Pulsar. | |
| --- | |
| To debug why a function fails to start, you can find function startup information and captured stderr output in the `logs/functions/<tenant>/<namespace>/<function>/<function>-<instance>.log` file. |