I'm also seeing this on 14.04.5 with the following versions:
# apt-cache show libc6 | grep Version
Version: 2.19-0ubuntu6.11
Version: 2.19-0ubuntu6
Restarting php5-fpm temporarily fixes the problem, but it comes back within a few hours. I've noticed this in PHP code that connects to a MySQL server and PHP code that attempts to perform an LDAP bind
I'm also seeing this on 14.04.5 with the following versions:
# apt-cache show libc6 | grep Version
Version: 2.19-0ubuntu6.11
Version: 2.19-0ubuntu6
Restarting php5-fpm temporarily fixes the problem, but it comes back within a few hours. I've noticed this in PHP code that connects to a MySQL server and PHP code that attempts to perform an LDAP bind