Comment 23 for bug 1374892

#uname -a
Linux <host_name_redacted> 3.16.0-52-generic #71~14.04.1-Ubuntu SMP Fri Oct 23 17:24:53 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

# apt-get install php5-apcu
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  php5-apcu
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/73.2 kB of archives.
After this operation, 313 kB of additional disk space will be used.
Selecting previously unselected package php5-apcu.
(Reading database ... 69260 files and directories currently installed.)
Preparing to unpack .../php5-apcu_4.0.2-2build1_amd64.deb ...
Unpacking php5-apcu (4.0.2-2build1) ... <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<WTH?
Setting up php5-apcu (4.0.2-2build1) ...
php5_invoke: Enable module apcu for cli SAPI
php5_invoke: Enable module apcu for apache2 SAPI
root@keep:/tmp# php5 -m
[PHP Modules]
bcmath
bz2
calendar
Core
ctype
curl
date
dba
dom
ereg
exif
fileinfo
filter
ftp
gd
gettext
hash
iconv
intl
json
ldap
libxml
mbstring
mhash
mysql
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
pdo_pgsql
pdo_sqlite
pgsql
Phar
posix
readline
Reflection
session
shmop
SimpleXML
soap
sockets
SPL
sqlite3
standard
sysvmsg
sysvsem
sysvshm
tokenizer
wddx
xml
xmlreader
xmlwriter
Zend OPcache
zip
zlib

[Zend Modules]
Zend OPcache

# tail -5 /var/log/owncloud.log
{"reqId":"i4CpeXu3Ix\/vEGLIhBUG","remoteAddr":"192.168.0.10","app":"remote","message":"Missing memcache class \\OC\\Memcache\\APCu for local cache","level":4,"time":"2015-11-06T20:44:35-07:00"}
{"reqId":"weifamjP+yWvMDx\/wnM7","remoteAddr":"192.168.0.2","app":"remote","message":"Missing memcache class \\OC\\Memcache\\APCu for local cache","level":4,"time":"2015-11-06T20:45:01-07:00"}
{"reqId":"w2N7OaYjER9E\/fZgD3Ax","remoteAddr":"192.168.0.10","app":"remote","message":"Missing memcache class \\OC\\Memcache\\APCu for local cache","level":4,"time":"2015-11-06T20:45:07-07:00"}
{"reqId":"ZnOVVFP94OUl07Vg3LaP","remoteAddr":"192.168.0.2","app":"remote","message":"Missing memcache class \\OC\\Memcache\\APCu for local cache","level":4,"time":"2015-11-06T20:45:33-07:00"}
{"reqId":"FEmYpnsCeCgkxEQltw9k","remoteAddr":"192.168.0.10","app":"remote","message":"Missing memcache class \\OC\\Memcache\\APCu for local cache","level":4,"time":"2015-11-06T20:45:39-07:00"}

What's going on, is this a OwnCloud issue or a PHP or a Ubuntu issue? Everything was running PERFECTLY until I did an apt-get dist-upgrade and rebooted.

Worked fine with previous php5-apcu 4.0.6-1 version...Can I get that from someone please?

Was directed here from https://github.com/owncloud/core/issues/14386