Comment 24 for bug 1585614

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Stephen Cox (stephen-cox) wrote :

This has affected one of my 14.04 web servers and a couple of 12.04, out of 40 Ubuntu servers.

All show the following in the Apache error log:
[Thu May 26 02:29:08.076578 2016] [mpm_prefork:notice] [pid 2199] AH00171: Graceful restart requested, doing restart
apache2: Syntax error on line 191 of /etc/apache2/apache2.conf: Syntax error on line 1 of /etc/apache2/mods-enabled/php5.load: Cannot load /usr/lib/apache2/modules/libphp5.so into server: /lib/x86_64-linux-gnu/libm.so.6: symbol __strtold_nan, version GLIBC_PRIVATE not defined in file libc.so.6 with link time reference

Manually restarting Apache fixed the problem.