On all our servers (gentoo up to date, kernel 4.9.xxx ), apache 2.4.49 crash silently after some time (many hours or few days, about 2 or 3 times per week on high traffic servers, less on medium traffic servers). have to revert server version, no problem. No error log at all, apache processes still up, but all http(s) requests timeout. No firewall. Temp Fix : revert to 2.4.48 Same problem for many users on this forum : https://forum.directadmin.com/threads/httpd-2-4-49.64548/ Compilation flags : [ebuild R ] www-servers/apache-2.4.48-r3:2::gentoo USE="gdbm ldap (split-usr) ssl suexec suexec-caps threads -debug -doc (-selinux) -static -suexec-syslog" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_core authn_dbm authn_file authz_core authz_dbm authz_groupfile authz_host authz_owner authz_user autoindex brotli cache cgi cgid dav dav_fs dav_lock deflate dir env expires ext_filter file_cache filter headers http2 include info log_config logio mime mime_magic negotiation proxy proxy_fcgi proxy_wstunnel rewrite setenvif socache_shmcb speling status unique_id unixd userdir usertrack vhost_alias -access_compat -asis -auth_digest -auth_form -authn_dbd -authn_socache -authz_dbd -cache_disk -cache_socache -cern_meta -charset_lite -dbd -dumpio -ident -imagemap -lbmethod_bybusyness -lbmethod_byrequests -lbmethod_bytraffic -lbmethod_heartbeat -log_forensic (-lua) -macro -md -proxy_ajp -proxy_balancer -proxy_connect -proxy_ftp -proxy_html -proxy_http -proxy_http2 -proxy_scgi -proxy_uwsgi -ratelimit -remoteip -reqtimeout -session -session_cookie -session_crypto -session_dbd -slotmem_shm -socache_memcache -substitute -version -watchdog -xml2enc" APACHE2_MPMS="event -prefork -worker" LUA_SINGLE_TARGET="lua5-1 -lua5-3 -lua5-4" 0 KiB
Possibly related to bug 65592. Please try this patch: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/server/mpm/event/event.c?r1=1893659&r2=1893660&pathrev=1893660&view=patch
I have the same issue: Ubuntu 20.04.3 LTS PHP7.4-FPM 2.4.49-3+ubuntu20.04.1+deb.sury.org+2 Also filed a Github issue for this for the ppa maintainer: https://github.com/oerdnj/deb.sury.org/issues/1646
Also reported on FreeBSD, see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258767
This version should be removed because of this critical bug.