$wgMainCacheType = CACHE_MEMCACHED;
$wgParserCacheType = CACHE_MEMCACHED;
$wgMessageCacheType = CACHE_MEMCACHED;
$wgSessionCacheType = CACHE_MEMCACHED;
$wgMemCachedServers = array("unix:///var/run/memcached/memcached.sock:0");
$wgSessionsInMemcached = true; # optional
$wgSessionsInObjectCache = true; # optional

And tried to upgrade to latest of series 1.35 (1.35.8) but got error as follow

LogicException: Process cache for 'en' should be set by now

I had been report at task of https://phabricator.wikimedia.org/T258860 using MW 1.35.6.

Upgrade success when disable message cache as follows.

$wgMessageCacheType = CACHE_NONE;

Work fine look like until try to logging in as follows.

There seems to be a problem with your login session; this action has been canceled as a precaution against session hijacking. Please resubmit the form.

$wgMainCacheType = CACHE_NONE;
$wgParserCacheType = CACHE_NONE;
$wgMessageCacheType = CACHE_NONE;
$wgSessionCacheType = CACHE_NONE;
# $wgMemCachedServers = array("unix:///var/run/memcached/memcached.sock:0");
$wgSessionsInMemcached = false; # optional
$wgSessionsInObjectCache = false; # optional

Please help to debug.
Thanks a lot.

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Mentioned In: T258860: LogicException: Process cache for 'en' should be set by now (on translatewiki.net pageviews)
Mentioned Here: T298564: Add support for using ipv6 address for memcached
T258860: LogicException: Process cache for 'en' should be set by now (on translatewiki.net pageviews)

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Epopen created this task.Oct 13 2022, 10:13 AM

Restricted Application added a subscriber: • Aklapper. · View Herald TranscriptOct 13 2022, 10:13 AM

I'm seeing this too when upgrading from 1.35.5 to 1.39~rc.1. T298564: Add support for using ipv6 address for memcached ships in 1.35.6 (and other recent maintenance releases). My config looks like this:

$wgMainCacheType = CACHE_MEMCACHED;
$wgSessionCacheType = CACHE_MEMCACHED;

$wgMemCachedServers = [
	'mediawiki-memcached.<redacted>:11211',
];

/cc @Paladox @Krinkle as the authors and +2'ers of the original patch.

Restricted Application added a project: Performance-Team. · View Herald TranscriptOct 13 2022, 10:44 AM

At least the unix socket breakage seems to explained by the patch I linked above:

// old
>>> preg_split( '/:(?=\d)/', 'unix:///var/run/memcached/memcached.sock:0' );
=> [
     "unix:///var/run/memcached/memcached.sock",
     "0",
   ]

// new
>>> \Wikimedia\IPUtils::splitHostAndPort( 'unix:///var/run/memcached/memcached.sock:0' );
=> false

Not sure if it fully explains the errors I'm seeing with the hostname setup but the old regex based method returns ports as strings while IPUtils converts them to integers.

>>> preg_split( '/:(?=\d)/', 'memcached.example.org:11211' );
=> [
     "memcached.example.org",
     "11211",
   ]

>>> \Wikimedia\IPUtils::splitHostAndPort( 'memcached.example.org:11211' );
=> [
     "memcached.example.org",
     11211,
   ]

In T320707#8313919, @taavi wrote:
At least the unix socket breakage seems to explained by the patch I linked above:
// old
>>> preg_split( '/:(?=\d)/', 'unix:///var/run/memcached/memcached.sock:0' );
=> [
     "unix:///var/run/memcached/memcached.sock",
     "0",
   ]

// new
>>> \Wikimedia\IPUtils::splitHostAndPort( 'unix:///var/run/memcached/memcached.sock:0' );
=> false
Not sure if it fully explains the errors I'm seeing with the hostname setup but the old regex based method returns ports as strings while IPUtils converts them to integers.
>>> preg_split( '/:(?=\d)/', 'memcached.example.org:11211' );
=> [
     "memcached.example.org",
     "11211",
   ]

>>> \Wikimedia\IPUtils::splitHostAndPort( 'memcached.example.org:11211' );
=> [
     "memcached.example.org",
     11211,
   ]

Hi @taavi

Your analyzed the patch is correct , root cause and solution of my issue.
My new config as follows.

$wgMemCachedServers = ['localhost:11211',];

The issue fixed, version update successful and work fine.
Thanks you very much.

Epopen mentioned this in T258860: LogicException: Process cache for 'en' should be set by now (on translatewiki.net pageviews).Oct 14 2022, 3:14 AM

• Aklapper renamed this task from Cannot log in from MW1.35.8 or 1.35.6 with memcached. to Cannot log in from MW1.35.8 or 1.35.6 with memcached (port number in $wgMemCachedServers changed from string to integer).Oct 14 2022, 8:58 AM

• Aklapper removed Epopen as the assignee of this task.

Cannot log in from MW1.35.8 or 1.35.6 with memcached (port number in $wgMemCachedServers changed from string to integer)Closed, ResolvedPublicActions

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Cannot log in from MW1.35.8 or 1.35.6 with memcached (port number in $wgMemCachedServers changed from string to integer)
Closed, ResolvedPublic
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