Hi,
On one of my servers I keep receiving the error: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/memcached.so' - /usr/lib/php/20151012/memcached.so: undefined symbol: php_msgpack_serialize in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/memcached.so' - /usr/lib/php/20151012/memcached.so: undefined symbol: php_msgpack_serialize in Unknown on line 0
This is on a server running 16.04 LTS. The server running 14.04 does not seem to have this issue. The fix suggested here did now work for me http://community.rtcamp.com/t/receive-error-email-from-memcached/5998/4