Supervisor/supervisor

Open too many files

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#1003 opened on Oct 13, 2017

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help wantedlogging

Description

I sent usr2 signal to the main process every day, but it seems the log file descriptor does not release, which cause the fd increase every day. version 3.3.1

Contributor guide

Tech stack
python
Domain
backenddevops
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
Pythonunderstanding of signal handlingsupervisor internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
The issue reports that sending USR2 signal to the main process does not release log file descriptors, causing an increase over time. To reproduce, one would need to set up a supervisor environment with logging and repeatedly send USR2 signals. Investigation should focus on the USR2 signal handler in supervisor, likely in supervisor/supervisord.py or supervisor/options.py, and how it reopens log files. Check if file descriptors are being closed properly during log rotation. Look for any open file handles in loggers or child process management. The minimal information provided suggests that the bug may be intermittent or hardware specific.