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Description of problem:
Reload of httpd leaks a file descriptor.
Repeated reloads will eventually shut down server when file descriptor limit is reached.
Version-Release number of selected component (if applicable):
RHEL 9.1
httpd-core-2.4.53-7.el9_1.5.x86_64
httpd-2.4.53-7.el9_1.5.x86_64
How reproducible:
- Every time on RHEL 9.1 ubi image and on RHEL 9.1 VMs
- Happens with no modifications to httpd conf after install.
- Also happens if mpm conf is updated to use mpm_worker instead of mpm_event
Steps to Reproduce:
# cat /var/run/httpd/httpd.pid
35
# ls -l /proc/35/fd | wc -l
13
# systemctl reload httpd
# ls -l /proc/35/fd | wc -l
14
# systemctl reload httpd
# ls -l /proc/35/fd | wc -l
15
# while true; do systemctl reload httpd || break; ls -l /proc/35/fd | wc -l; done
16
17
...
1022
httpd.service is not active, cannot reload.
# tail /var/log/httpd/error_log
...
[Wed Apr 26 16:32:55.824207 2023] [lbmethod_heartbeat:notice] [pid 35:tid 35] AH02282: No slotmem from mod_heartmonitor
[Wed Apr 26 16:32:55.826628 2023] [core:error] [pid 35:tid 35] (24)Too many open files: AH00099: could not create /etc/httpd/run/httpd.pid.jp5DtD
[Wed Apr 26 16:32:55.826710 2023] [core:error] [pid 35:tid 35] AH00100: httpd: could not log pid to file /etc/httpd/run/httpd.pid
Actual results:
Number of open files grows with each reload. Eventually a reload brings httpd down.
Expected results:
Number of open files does not grow with each reload. httpd stays up.
Additional info:
Increasing fd ulimit can make it take longer to crash.
Cannot reproduce on apache/bullseye httpd:2.4.53 image.
Comment 1RHEL Program Management
2023-09-21 18:52:43 UTC
Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.
Comment 2RHEL Program Management
2023-09-21 19:06:24 UTC
This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there.
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