Databases
StackOverflow2013
Postsdbo
POApache : mysql and pdo_mysql : segmentation fault
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POApache : mysql and pdo_mysql : segmentation fault
    primarykey
    data
    text
    <p>I am actually administrating a server, and my web-related applications are obviously having some problems...</p> <p>When I look at my Apache error_log, I can see lots of... <code>[notice] child pid **** exit signal Segmentation fault (11)</code>.</p> <p>After some search, enabling/disabling PHP modules, I found out that there might be a problem with the "mysql", or "pdo_mysql" PHP module.</p> <ul> <li>When mysql.so is enabled, but <b>not</b> pdo_mysql.so, no more segmentation faults occur. However, using mysql as a PDO driver in PHP applications is not longer possible.</li> <li>When pdo_mysql.so is enabled, but <b>not</b> mysql.so, child processes live longer, but still segfault after some time.</li> </ul> <p>I've used gdb to explore some core dumps I've asked to Apache. There is the core dump analysis.</p> <pre><code>[New Thread 4565] Reading symbols from /lib/libm.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/libm.so.6 Reading symbols from /lib/libpcre.so.0...done. Loaded symbols for /lib/libpcre.so.0 Reading symbols from /lib/libselinux.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libselinux.so.1 Reading symbols from /usr/lib/libaprutil-1.so.0...done. Loaded symbols for /usr/lib/libaprutil-1.so.0 Reading symbols from /lib/libcrypt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libcrypt.so.1 Reading symbols from /lib/libexpat.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/libexpat.so.0 Reading symbols from /lib/libdb-4.3.so...(no debugging symbols found)...done. Loaded symbols for /lib/libdb-4.3.so Reading symbols from /usr/lib/libapr-1.so.0...done. Loaded symbols for /usr/lib/libapr-1.so.0 Reading symbols from /lib/libpthread.so.0...(no debugging symbols found)...done. [Thread debugging using libthread_db enabled] Loaded symbols for /lib/libpthread.so.0 Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/libdl.so.2 Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/libc.so.6 Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/ld-linux.so.2 Reading symbols from /lib/libsepol.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libsepol.so.1 Reading symbols from /lib/libuuid.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libuuid.so.1 Reading symbols from /lib/libresolv.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/libresolv.so.2 Reading symbols from /lib/libnss_files.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/libnss_files.so.2 Reading symbols from /lib/libnss_dns.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/libnss_dns.so.2 Reading symbols from /usr/lib/libldap-2.3.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libldap-2.3.so.0 Reading symbols from /usr/lib/liblber-2.3.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/liblber-2.3.so.0 Reading symbols from /usr/lib/libsasl2.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libsasl2.so.2 Reading symbols from /lib/libssl.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/libssl.so.6 Reading symbols from /lib/libcrypto.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/libcrypto.so.6 Reading symbols from /usr/lib/libgssapi_krb5.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgssapi_krb5.so.2 Reading symbols from /usr/lib/libkrb5.so.3...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libkrb5.so.3 Reading symbols from /lib/libcom_err.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/libcom_err.so.2 Reading symbols from /usr/lib/libk5crypto.so.3...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libk5crypto.so.3 Reading symbols from /lib/libz.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libz.so.1 Reading symbols from /usr/lib/libkrb5support.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libkrb5support.so.0 Reading symbols from /lib/libkeyutils.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libkeyutils.so.1 Reading symbols from /usr/lib/apr-util-1/apr_ldap-1.so...done. Loaded symbols for /usr/lib/apr-util-1/apr_ldap-1.so Reading symbols from /lib/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/librt.so.1 Reading symbols from /etc/httpd/modules/mod_auth_basic.so...done. Loaded symbols for /etc/httpd/modules/mod_auth_basic.so Reading symbols from /etc/httpd/modules/mod_auth_digest.so...done. Loaded symbols for /etc/httpd/modules/mod_auth_digest.so Reading symbols from /etc/httpd/modules/mod_authn_file.so...done. Loaded symbols for /etc/httpd/modules/mod_authn_file.so Reading symbols from /etc/httpd/modules/mod_authn_alias.so...done. Loaded symbols for /etc/httpd/modules/mod_authn_alias.so Reading symbols from /etc/httpd/modules/mod_authn_anon.so...done. Loaded symbols for /etc/httpd/modules/mod_authn_anon.so Reading symbols from /etc/httpd/modules/mod_authn_dbm.so...done. Loaded symbols for /etc/httpd/modules/mod_authn_dbm.so Reading symbols from /etc/httpd/modules/mod_authn_default.so...done. Loaded symbols for /etc/httpd/modules/mod_authn_default.so Reading symbols from /etc/httpd/modules/mod_authz_host.so...done. Loaded symbols for /etc/httpd/modules/mod_authz_host.so Reading symbols from /etc/httpd/modules/mod_authz_user.so...done. Loaded symbols for /etc/httpd/modules/mod_authz_user.so Reading symbols from /etc/httpd/modules/mod_authz_owner.so...done. Loaded symbols for /etc/httpd/modules/mod_authz_owner.so Reading symbols from /etc/httpd/modules/mod_authz_groupfile.so...done. Loaded symbols for /etc/httpd/modules/mod_authz_groupfile.so Reading symbols from /etc/httpd/modules/mod_authz_dbm.so...done. Loaded symbols for /etc/httpd/modules/mod_authz_dbm.so Reading symbols from /etc/httpd/modules/mod_authz_default.so...done. Loaded symbols for /etc/httpd/modules/mod_authz_default.so Reading symbols from /etc/httpd/modules/mod_ldap.so...done. Loaded symbols for /etc/httpd/modules/mod_ldap.so Reading symbols from /etc/httpd/modules/mod_authnz_ldap.so...done. Loaded symbols for /etc/httpd/modules/mod_authnz_ldap.so Reading symbols from /etc/httpd/modules/mod_include.so...done. Loaded symbols for /etc/httpd/modules/mod_include.so Reading symbols from /etc/httpd/modules/mod_log_config.so...done. Loaded symbols for /etc/httpd/modules/mod_log_config.so Reading symbols from /etc/httpd/modules/mod_logio.so...done. Loaded symbols for /etc/httpd/modules/mod_logio.so Reading symbols from /etc/httpd/modules/mod_env.so...done. Loaded symbols for /etc/httpd/modules/mod_env.so Reading symbols from /etc/httpd/modules/mod_ext_filter.so...done. Loaded symbols for /etc/httpd/modules/mod_ext_filter.so Reading symbols from /etc/httpd/modules/mod_mime_magic.so...done. Loaded symbols for /etc/httpd/modules/mod_mime_magic.so Reading symbols from /etc/httpd/modules/mod_expires.so...done. Loaded symbols for /etc/httpd/modules/mod_expires.so Reading symbols from /etc/httpd/modules/mod_deflate.so...done. Loaded symbols for /etc/httpd/modules/mod_deflate.so Reading symbols from /etc/httpd/modules/mod_headers.so...done. Loaded symbols for /etc/httpd/modules/mod_headers.so Reading symbols from /etc/httpd/modules/mod_usertrack.so...done. Loaded symbols for /etc/httpd/modules/mod_usertrack.so Reading symbols from /etc/httpd/modules/mod_setenvif.so...done. Loaded symbols for /etc/httpd/modules/mod_setenvif.so Reading symbols from /etc/httpd/modules/mod_mime.so...done. Loaded symbols for /etc/httpd/modules/mod_mime.so Reading symbols from /etc/httpd/modules/mod_dav.so...done. Loaded symbols for /etc/httpd/modules/mod_dav.so Reading symbols from /etc/httpd/modules/mod_status.so...done. Loaded symbols for /etc/httpd/modules/mod_status.so Reading symbols from /etc/httpd/modules/mod_autoindex.so...done. Loaded symbols for /etc/httpd/modules/mod_autoindex.so Reading symbols from /etc/httpd/modules/mod_info.so...done. Loaded symbols for /etc/httpd/modules/mod_info.so Reading symbols from /etc/httpd/modules/mod_dav_fs.so...done. Loaded symbols for /etc/httpd/modules/mod_dav_fs.so Reading symbols from /etc/httpd/modules/mod_vhost_alias.so...done. Loaded symbols for /etc/httpd/modules/mod_vhost_alias.so Reading symbols from /etc/httpd/modules/mod_negotiation.so...done. Loaded symbols for /etc/httpd/modules/mod_negotiation.so Reading symbols from /etc/httpd/modules/mod_dir.so...done. Loaded symbols for /etc/httpd/modules/mod_dir.so Reading symbols from /etc/httpd/modules/mod_actions.so...done. Loaded symbols for /etc/httpd/modules/mod_actions.so Reading symbols from /etc/httpd/modules/mod_speling.so...done. Loaded symbols for /etc/httpd/modules/mod_speling.so Reading symbols from /etc/httpd/modules/mod_userdir.so...done. Loaded symbols for /etc/httpd/modules/mod_userdir.so Reading symbols from /etc/httpd/modules/mod_alias.so...done. Loaded symbols for /etc/httpd/modules/mod_alias.so Reading symbols from /etc/httpd/modules/mod_rewrite.so...done. Loaded symbols for /etc/httpd/modules/mod_rewrite.so Reading symbols from /etc/httpd/modules/mod_proxy.so...done. Loaded symbols for /etc/httpd/modules/mod_proxy.so Reading symbols from /etc/httpd/modules/mod_proxy_balancer.so...done. Loaded symbols for /etc/httpd/modules/mod_proxy_balancer.so Reading symbols from /etc/httpd/modules/mod_proxy_ftp.so...done. Loaded symbols for /etc/httpd/modules/mod_proxy_ftp.so Reading symbols from /etc/httpd/modules/mod_proxy_http.so...done. Loaded symbols for /etc/httpd/modules/mod_proxy_http.so Reading symbols from /etc/httpd/modules/mod_proxy_connect.so...done. Loaded symbols for /etc/httpd/modules/mod_proxy_connect.so Reading symbols from /etc/httpd/modules/mod_cache.so...done. Loaded symbols for /etc/httpd/modules/mod_cache.so Reading symbols from /etc/httpd/modules/mod_suexec.so...done. Loaded symbols for /etc/httpd/modules/mod_suexec.so Reading symbols from /etc/httpd/modules/mod_disk_cache.so...done. Loaded symbols for /etc/httpd/modules/mod_disk_cache.so Reading symbols from /etc/httpd/modules/mod_file_cache.so...done. Loaded symbols for /etc/httpd/modules/mod_file_cache.so Reading symbols from /etc/httpd/modules/mod_mem_cache.so...done. Loaded symbols for /etc/httpd/modules/mod_mem_cache.so Reading symbols from /etc/httpd/modules/mod_cgi.so...done. Loaded symbols for /etc/httpd/modules/mod_cgi.so Reading symbols from /etc/httpd/modules/mod_version.so...done. Loaded symbols for /etc/httpd/modules/mod_version.so Reading symbols from /etc/httpd/modules/libphp5.so...(no debugging symbols found)...done. Loaded symbols for /etc/httpd/modules/libphp5.so Reading symbols from /usr/lib/sse2/libgmp.so.3...done. Loaded symbols for /usr/lib/sse2/libgmp.so.3 Reading symbols from /usr/lib/libbz2.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libbz2.so.1 Reading symbols from /lib/libnsl.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libnsl.so.1 Reading symbols from /usr/lib/libxml2.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libxml2.so.2 Reading symbols from /etc/httpd/modules/mod_proxy_ajp.so...done. Loaded symbols for /etc/httpd/modules/mod_proxy_ajp.so Reading symbols from /etc/httpd/modules/mod_ssl.so...done. Loaded symbols for /etc/httpd/modules/mod_ssl.so Reading symbols from /usr/lib/libdistcache.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libdistcache.so.1 Reading symbols from /usr/lib/libnal.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libnal.so.1 Reading symbols from /usr/lib/kloxophp/ioncube/ioncube_loader_lin_age.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/kloxophp/ioncube/ioncube_loader_lin_age.so Reading symbols from /usr/lib/php/modules/curl.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/curl.so Reading symbols from /usr/lib/libcurl.so.3...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libcurl.so.3 Reading symbols from /usr/lib/libidn.so.11...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libidn.so.11 Reading symbols from /usr/lib/php/modules/dom.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/dom.so Reading symbols from /usr/lib/php/modules/fileinfo.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/fileinfo.so Reading symbols from /usr/lib/php/modules/gd.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/gd.so Reading symbols from /usr/lib/libfreetype.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libfreetype.so.6 Reading symbols from /usr/lib/libX11.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libX11.so.6 Reading symbols from /usr/lib/libXpm.so.4...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libXpm.so.4 Reading symbols from /usr/lib/libpng12.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpng12.so.0 Reading symbols from /usr/lib/libjpeg.so.62...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libjpeg.so.62 Reading symbols from /usr/lib/libXau.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libXau.so.6 Reading symbols from /usr/lib/libXdmcp.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libXdmcp.so.6 Reading symbols from /usr/lib/php/modules/imap.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/imap.so Reading symbols from /usr/lib/libc-client.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libc-client.so.1 Reading symbols from /lib/libpam.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/libpam.so.0 Reading symbols from /lib/libaudit.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/libaudit.so.0 Reading symbols from /usr/lib/php/modules/json.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/json.so Reading symbols from /usr/lib/php/modules/mbstring.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/mbstring.so Reading symbols from /usr/lib/php/modules/mcrypt.so...done. Loaded symbols for /usr/lib/php/modules/mcrypt.so Reading symbols from /usr/lib/libmcrypt.so.4...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libmcrypt.so.4 Reading symbols from /usr/lib/php/modules/mysql.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/mysql.so Reading symbols from /usr/lib/mysql/libmysqlclient.so.15...done. Loaded symbols for /usr/lib/mysql/libmysqlclient.so.15 Reading symbols from /usr/lib/php/modules/mysqli.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/mysqli.so Reading symbols from /usr/lib/php/modules/pdo.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/pdo.so Reading symbols from /usr/lib/php/modules/pdo_mysql.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/pdo_mysql.so Reading symbols from /usr/lib/php/modules/pdo_sqlite.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/pdo_sqlite.so Reading symbols from /usr/lib/libsqlite3.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libsqlite3.so.0 Reading symbols from /usr/lib/php/modules/phar.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/phar.so Reading symbols from /usr/lib/php/modules/snmp.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/snmp.so Reading symbols from /usr/lib/libnetsnmp.so.10...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libnetsnmp.so.10 Reading symbols from /lib/libwrap.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/libwrap.so.0 Reading symbols from /usr/lib/php/modules/soap.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/soap.so Reading symbols from /usr/lib/php/modules/wddx.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/wddx.so Reading symbols from /usr/lib/php/modules/xmlreader.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/xmlreader.so Reading symbols from /usr/lib/php/modules/xmlwriter.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/xmlwriter.so Reading symbols from /usr/lib/php/modules/xsl.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/xsl.so Reading symbols from /usr/lib/libexslt.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libexslt.so.0 Reading symbols from /usr/lib/libxslt.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libxslt.so.1 Reading symbols from /usr/lib/libgcrypt.so.11...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgcrypt.so.11 Reading symbols from /usr/lib/libgpg-error.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgpg-error.so.0 Reading symbols from /usr/lib/php/modules/zip.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/php/modules/zip.so Core was generated by `/usr/sbin/httpd -k graceful'. Program terminated with signal 11, Segmentation fault. #0 0xb60e8dc6 in tcp_getline () from /usr/lib/libc-client.so.1 </code></pre> <p>I am not very familiar with those analysis, but it seems like all my PHP modules are mentionned, none of them is missing. Doesn't seem to have any problem with mysql, nor pdo_mysql.</p> <p>Having some experience in C programming, I would basically say that /usr/sbin/httpd requires more memory than he should. Perhaps I ask him to handle more modules than he's capable of. No idea. In this case, would there be a way to allocate more memory to the child processes ?</p> <p>Or perhaps another problem I don't see ? Thanks for you answers ;) If you need extra information, please ask.</p> <hr> <p>Additional information :</p> <p>PHP 5.3.3-13.el5_8 installed. HTTPD 2.2.23-3 installed. I don't have suphp installed, but I don't remember seeing it before upgrading to PHP5.3. I have listed the modules requested by Apache (.ini files in /etc/php.d/), and each of them belongs to a php53-* package installed on my system.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJohn WH Smith
    1. USJohn WH Smith
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. POApache : mysql and pdo_mysql : segmentation fault
      1. This table or related slice is empty.
      1. VTUpMod
    1. COmake sure that your php modules, php itself, and the php module for apache are all compiled for each other. if you're mixing package sources/versions, there's no guarantees at all about how stable the setup will be.
      singulars
      1. POApache : mysql and pdo_mysql : segmentation fault
      1. USMarc B
    2. COI've recently updated to PHP 5.3, but I'm pretty sure the segfaults were here before. I've checked the versions, however could you tell me how you would do the checkings, so that I make sure everything has been done correctly ?
      singulars
      1. POApache : mysql and pdo_mysql : segmentation fault
      1. USJohn WH Smith
    3. COdid you update the modules as well? using a module compiled for (say) 5.2 is not good idea.
      singulars
      1. POApache : mysql and pdo_mysql : segmentation fault
      1. USMarc B
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload