Article ID: 125839, created on Jun 11, 2015, last review on Jun 11, 2015

  • Applies to:
  • Plesk 12.0 for Linux
  • Plesk 11.0 for Linux


Plesk and websites are not accessible.

Apache startup fails with error:

# service httpd start
httpd: Syntax error on line 211 of /etc/httpd/conf/httpd.conf: Syntax error on line 6 of /etc/httpd/conf.d/php.conf: Cannot load /etc/httpd/modules/ into server: //.hmmr/Tor/ undefined symbol: _ZNSt8messagesIcE2idE, version GLIBCXX_3.4

MySQL startup fails with error:

# /etc/init.d/mysqld start
/usr/bin/mysqladmin: symbol lookup error: //.hmmr/Tor/ undefined symbol: _ZNSt8messagesIcE2idE, version GLIBCXX_3.4
Cannot check for MySQL Daemon startup because of mysqladmin failure.
Starting mysqld:                                           [FAILED]


Broken links to the libraries: mysqld and httpd services are trying to use the package /.hmmr/Tor/ instead of the package /usr/lib/

[root@u15425547 ~]# locate


Execute ldconfig command to force the kernel to re-read the libraries and recreate the libraries cache:

# ldconfig

Search Words

500 server error

_ZNSt8messagesIcE2idE, version GLIBCXX_3.4

mysql error

symbol lookup error

Cannot load /etc/httpd/modules/ into server

httpd error

mysqld will not start undefined symbol: _ZNSt8messagesIcE2idE, version GLIBCXX_3.4 undefined symbol


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