Bug 1807664
| Summary: | Apache stops processing requests approximately once per week | ||||||||
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| Product: | Red Hat Enterprise Linux 8 | Reporter: | Suzanne <olsonsuzanne88> | ||||||
| Component: | httpd | Assignee: | Luboš Uhliarik <luhliari> | ||||||
| Status: | CLOSED WONTFIX | QA Contact: | rhel-cs-infra-services-qe <rhel-cs-infra-services-qe> | ||||||
| Severity: | high | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | 8.1 | CC: | jorton, luhliari, pasik | ||||||
| Target Milestone: | rc | ||||||||
| Target Release: | 8.0 | ||||||||
| Hardware: | x86_64 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2021-08-26 07:27:10 UTC | Type: | Bug | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Attachments: |
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Do you need any additional information in regards to this bug report? Please let me know. Created attachment 1672029 [details]
Logs from another stuck instance
I am attaching log file (output of lsof and strace) of another stuck instance of Apache.
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Created attachment 1666085 [details] netstat and strace outputs Description of problem: Apache server stops processing requests approximately once per week. There are 12 virtual hosts configured on the server. Some are running PHP (WordPress) sites, and some mod-mono apps. The problem usually starts manifesting itself on one random virtual host first, but then spreads to the rest of them within the next few minutes. Connections to Apache get stuck in the CLOSE_WAIT state and a restart of the httpd service is required. I am attaching netstat and strace outputs in the log.txt file. Output of the 'top' is normal (CPU load is normal, there is sufficient free memory, ...) and 'lsof | wc -l' also returns a normal value (last time it was 137063, which does not seem to be any different than when everything is working fine). There are no errors logged in the Apache's error_log file or RHEL's /var/log/messages file while the requests are not being processed. I have increased the following system parameters, but that did not solve the problem: net.ipv4.tcp_max_syn_backlog=8192 net.core.somaxconn=4096 What could be the cause? Version-Release number of selected component (if applicable): httpd 2.4.37-16 How reproducible: It happens approximately once per week. Steps to Reproduce: Steps to reproduce are unknown.