php-fpm and core dumps

kminh · 2015-03-06 11:35:35

Hi,

I'm using php-fpm 5.6.6-1 with Apache 2.4.12-2 (I followed installation instruction here: https://wiki.archlinux.org/index.php/Ap … proxy_fcgi).

Enabled modules in httpd.conf:

LoadModule authn_file_module modules/mod_authn_file.so
#LoadModule authn_dbm_module modules/mod_authn_dbm.so
#LoadModule authn_anon_module modules/mod_authn_anon.so
#LoadModule authn_dbd_module modules/mod_authn_dbd.so
#LoadModule authn_socache_module modules/mod_authn_socache.so
LoadModule authn_core_module modules/mod_authn_core.so
LoadModule authz_host_module modules/mod_authz_host.so
LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
LoadModule authz_user_module modules/mod_authz_user.so
#LoadModule authz_dbm_module modules/mod_authz_dbm.so
#LoadModule authz_owner_module modules/mod_authz_owner.so
#LoadModule authz_dbd_module modules/mod_authz_dbd.so
LoadModule authz_core_module modules/mod_authz_core.so
#LoadModule authnz_ldap_module modules/mod_authnz_ldap.so
LoadModule access_compat_module modules/mod_access_compat.so
LoadModule auth_basic_module modules/mod_auth_basic.so
#LoadModule auth_form_module modules/mod_auth_form.so
#LoadModule auth_digest_module modules/mod_auth_digest.so
#LoadModule allowmethods_module modules/mod_allowmethods.so
#LoadModule file_cache_module modules/mod_file_cache.so
#LoadModule cache_module modules/mod_cache.so
#LoadModule cache_disk_module modules/mod_cache_disk.so
#LoadModule cache_socache_module modules/mod_cache_socache.so
#LoadModule socache_shmcb_module modules/mod_socache_shmcb.so
#LoadModule socache_dbm_module modules/mod_socache_dbm.so
#LoadModule socache_memcache_module modules/mod_socache_memcache.so
#LoadModule watchdog_module modules/mod_watchdog.so
#LoadModule macro_module modules/mod_macro.so
#LoadModule dbd_module modules/mod_dbd.so
#LoadModule dumpio_module modules/mod_dumpio.so
#LoadModule echo_module modules/mod_echo.so
#LoadModule buffer_module modules/mod_buffer.so
#LoadModule data_module modules/mod_data.so
#LoadModule ratelimit_module modules/mod_ratelimit.so
#LoadModule reqtimeout_module modules/mod_reqtimeout.so
#LoadModule ext_filter_module modules/mod_ext_filter.so
#LoadModule request_module modules/mod_request.so
LoadModule include_module modules/mod_include.so
LoadModule filter_module modules/mod_filter.so
#LoadModule reflector_module modules/mod_reflector.so
#LoadModule substitute_module modules/mod_substitute.so
#LoadModule sed_module modules/mod_sed.so
#LoadModule charset_lite_module modules/mod_charset_lite.so
#LoadModule deflate_module modules/mod_deflate.so
#LoadModule xml2enc_module modules/mod_xml2enc.so
#LoadModule proxy_html_module modules/mod_proxy_html.so
LoadModule mime_module modules/mod_mime.so
#LoadModule ldap_module modules/mod_ldap.so
LoadModule log_config_module modules/mod_log_config.so
#LoadModule log_debug_module modules/mod_log_debug.so
#LoadModule log_forensic_module modules/mod_log_forensic.so
#LoadModule logio_module modules/mod_logio.so
#LoadModule lua_module modules/mod_lua.so
LoadModule env_module modules/mod_env.so
#LoadModule mime_magic_module modules/mod_mime_magic.so
#LoadModule cern_meta_module modules/mod_cern_meta.so
LoadModule expires_module modules/mod_expires.so
LoadModule headers_module modules/mod_headers.so
#LoadModule ident_module modules/mod_ident.so
#LoadModule usertrack_module modules/mod_usertrack.so
LoadModule unique_id_module modules/mod_unique_id.so
LoadModule setenvif_module modules/mod_setenvif.so
LoadModule version_module modules/mod_version.so
#LoadModule remoteip_module modules/mod_remoteip.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so
#LoadModule proxy_scgi_module modules/mod_proxy_scgi.so
#LoadModule proxy_fdpass_module modules/mod_proxy_fdpass.so
LoadModule proxy_wstunnel_module modules/mod_proxy_wstunnel.so
LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule proxy_express_module modules/mod_proxy_express.so
#LoadModule session_module modules/mod_session.so
#LoadModule session_cookie_module modules/mod_session_cookie.so
#LoadModule session_crypto_module modules/mod_session_crypto.so
#LoadModule session_dbd_module modules/mod_session_dbd.so
LoadModule slotmem_shm_module modules/mod_slotmem_shm.so
#LoadModule slotmem_plain_module modules/mod_slotmem_plain.so
LoadModule ssl_module modules/mod_ssl.so
#LoadModule dialup_module modules/mod_dialup.so
LoadModule lbmethod_byrequests_module modules/mod_lbmethod_byrequests.so
LoadModule lbmethod_bytraffic_module modules/mod_lbmethod_bytraffic.so
LoadModule lbmethod_bybusyness_module modules/mod_lbmethod_bybusyness.so
LoadModule lbmethod_heartbeat_module modules/mod_lbmethod_heartbeat.so
LoadModule mpm_event_module modules/mod_mpm_event.so
#LoadModule mpm_prefork_module modules/mod_mpm_prefork.so
LoadModule unixd_module modules/mod_unixd.so
#LoadModule heartbeat_module modules/mod_heartbeat.so
#LoadModule heartmonitor_module modules/mod_heartmonitor.so
#LoadModule dav_module modules/mod_dav.so
LoadModule status_module modules/mod_status.so
LoadModule autoindex_module modules/mod_autoindex.so
#LoadModule asis_module modules/mod_asis.so
#LoadModule info_module modules/mod_info.so
#LoadModule suexec_module modules/mod_suexec.so
#LoadModule cgid_module modules/mod_cgid.so
#LoadModule cgi_module modules/mod_cgi.so
#LoadModule dav_fs_module modules/mod_dav_fs.so
#LoadModule dav_lock_module modules/mod_dav_lock.so
LoadModule vhost_alias_module modules/mod_vhost_alias.so
LoadModule negotiation_module modules/mod_negotiation.so
LoadModule dir_module modules/mod_dir.so
#LoadModule php5_module modules/libphp5.so
#LoadModule imagemap_module modules/mod_imagemap.so
LoadModule actions_module modules/mod_actions.so
#LoadModule speling_module modules/mod_speling.so
LoadModule userdir_module modules/mod_userdir.so
LoadModule alias_module modules/mod_alias.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule fastcgi_module modules/mod_fastcgi.so
#LoadModule fcgid_module modules/mod_fcgid.so

Php-fpm seems to segfault a lot, and it is flooding the /var/lib/systemd/coredumps/ folder with a lot of core dumps, although I have set rlimit_core to something sensible in /etc/php/php-fpm.conf.

I try to follow the steps described here: https://rtcamp.com/tutorials/php/core-dump-php5-fpm/ but all the above core dumps can't be read (one example: core.php-fpm.1000.446d4ac5303e4dfabd5051b441af66c1.5228.1425640939000000.lz4).

Appreciate any insight.

Last edited by ewaller (2015-03-07 01:30:35)

ewaller · 2015-03-07 01:35:18

First, Welcome to Arch Linux
Second, Thank you for using BBCode tags
Third, I hope you don't mind that I exercised my powers and changed your quote tags to code tags.

What do you mean the core dumps cannot be read? What are the error messages? Is the user you are using to try to read those core dumps in the correct groups (httpd) to be allowed to read them? Is there anything interesting in the journal that coincides with the segfaults?

kminh · 2015-03-09 17:22:17

Thank you for your reply ewaller. I was confused as to what tag to use and somehow went with quote tag.

Regarding your questions:

What do you mean the core dumps cannot be read? What are the error messages?

This is the error message when I try using

gdb /usr/bin/php-fpm /var/lib/systemd/coredump/core.php-fpm.1000.446d4ac5303e4dfabd5051b441af66c1.5228.1425640939000000.lz4

:

Reading symbols from /usr/bin/php-fpm...(no debugging symbols found)...done.
"/var/lib/systemd/coredump/core.php-fpm.1000.446d4ac5303e4dfabd5051b441af66c1.5228.1425640939000000.lz4" is not a core dump: File format not recognized

Is the user you are using to try to read those core dumps in the correct groups (httpd) to be allowed to read them?

The coredump is owned by root/root and I run the command using sudo.

Is there anything interesting in the journal that coincides with the segfaults?

This is what's logged in the journal when php-fpm crashes (not helpful I think):

Mar 10 00:14:18 kdmlabs systemd-coredump[30100]: Process 30015 (php-fpm) of user 1000 dumped core.
-- Subject: Process 30015 (php-fpm) dumped core
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- Documentation: man:core(5)
-- 
-- Process 30015 (php-fpm) crashed and dumped core.
-- 
-- This usually indicates a programming error in the crashing program and
-- should be reported to its vendor as a bug.

Thanks for any insight.

By the way is there a quick way to wrap text in bbcode? I don't see any button.

Last edited by kminh (2015-03-09 17:22:42)

Arch Linux

#1 2015-03-06 11:35:35

php-fpm and core dumps

#2 2015-03-07 01:35:18

Re: php-fpm and core dumps

#3 2015-03-09 17:22:17

Re: php-fpm and core dumps

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