https://bz.apache.org/bugzilla/show_bug.cgi?id=67787
Bug ID: 67787
Summary: httpd fails to gracefully restart after update in
CentOS 7
Product: Apache httpd-2
Version: 2.4.6
Hardware: Other
OS: Linux
Status: NEW
Severity: minor
Priority: P2
Component: mod_proxy
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Patching our CentOS 7 servers for the month. httpd downloaded and installed
updates. Logs reveal it attempts to restart gracefully, but fails with the
following error:
[Tue Oct 17 13:26:13.268569 2023] [mpm_prefork:notice] [pid 1758] AH00171:
Graceful restart requested, doing restart
httpd: Syntax error on line 56 of /etc/httpd/conf/httpd.conf: Syntax error on
line 2 of /etc/httpd/conf.modules.d/00-proxy.conf: Cannot load
modules/mod_proxy.so into server: /etc/httpd/modules/mod_proxy.so: undefined
symbol: ap_check_pipeline
Running nm -D /usr/lib64/httpd/modules/mod_proxy.so reveals that
ap_check_pipeline is undefined. But, it is also undefined in our Rocky 8
servers and those installed updates and restarted fine automatically.
Kernel version for our CentOS 7 servers: 3.10.0-1160.95.1.el7.x86_64
Kernel version for our Rocky 8 servers: 4.18.0-477.21.1.el8_8.x86_64
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