jenkins-bot has submitted this change and it was merged.
Change subject: More rigorous clearing of image redirect cache
......................................................................
More rigorous clearing of image redirect cache
Instead of deleting the cache key, set a temporary
value, so that the key stays "deleted" long enough
so that replag won't cause the key to be repopulated with
an incorrect value from a slave db.
Bug: 52200
Change-Id: I0941c93b76fb0aa8eedb883a3ed1167c6e14d0c0
---
M includes/filerepo/LocalRepo.php
M includes/specials/SpecialMovepage.php
2 files changed, 9 insertions(+), 12 deletions(-)
Approvals:
Aaron Schulz: Looks good to me, approved
jenkins-bot: Verified
diff --git a/includes/filerepo/LocalRepo.php b/includes/filerepo/LocalRepo.php
index 549be40..9b62243 100644
--- a/includes/filerepo/LocalRepo.php
+++ b/includes/filerepo/LocalRepo.php
@@ -171,13 +171,13 @@
if ( $cachedValue === ' ' || $cachedValue === '' ) {
// Does not exist
return false;
- } elseif ( strval( $cachedValue ) !== '' ) {
+ } elseif ( strval( $cachedValue ) !== '' && $cachedValue !== '
PURGED' ) {
return Title::newFromText( $cachedValue, NS_FILE );
} // else $cachedValue is false or null: cache miss
$id = $this->getArticleID( $title );
if ( !$id ) {
- $wgMemc->set( $memcKey, " ", $expiry );
+ $wgMemc->add( $memcKey, " ", $expiry );
return false;
}
$dbr = $this->getSlaveDB();
@@ -190,10 +190,10 @@
if ( $row && $row->rd_namespace == NS_FILE ) {
$targetTitle = Title::makeTitle( $row->rd_namespace,
$row->rd_title );
- $wgMemc->set( $memcKey, $targetTitle->getDBkey(),
$expiry );
+ $wgMemc->add( $memcKey, $targetTitle->getDBkey(),
$expiry );
return $targetTitle;
} else {
- $wgMemc->set( $memcKey, '', $expiry );
+ $wgMemc->add( $memcKey, '', $expiry );
return false;
}
}
@@ -347,7 +347,11 @@
global $wgMemc;
$memcKey = $this->getSharedCacheKey( 'image_redirect', md5(
$title->getDBkey() ) );
if ( $memcKey ) {
- $wgMemc->delete( $memcKey );
+ // Set a temporary value for the cache key, to ensure
+ // that this value stays purged long enough so that
+ // it isn't refreshed with a stale value due to a
+ // lagged slave.
+ $wgMemc->set( $memcKey, ' PURGED', 12 );
}
}
}
diff --git a/includes/specials/SpecialMovepage.php
b/includes/specials/SpecialMovepage.php
index 0e342cc..1dc4244 100644
--- a/includes/specials/SpecialMovepage.php
+++ b/includes/specials/SpecialMovepage.php
@@ -692,13 +692,6 @@
# Deal with watches (we don't watch subpages)
WatchAction::doWatchOrUnwatch( $this->watch, $ot, $user );
WatchAction::doWatchOrUnwatch( $this->watch, $nt, $user );
-
- # Re-clear the file redirect cache, which may have been
polluted by
- # parsing in messages above. See CR r56745.
- # @todo FIXME: Needs a more robust solution inside FileRepo.
- if ( $ot->getNamespace() == NS_FILE ) {
-
RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $ot );
- }
}
function showLogFragment( $title ) {
--
To view, visit https://gerrit.wikimedia.org/r/77562
To unsubscribe, visit https://gerrit.wikimedia.org/r/settings
Gerrit-MessageType: merged
Gerrit-Change-Id: I0941c93b76fb0aa8eedb883a3ed1167c6e14d0c0
Gerrit-PatchSet: 2
Gerrit-Project: mediawiki/core
Gerrit-Branch: master
Gerrit-Owner: Brian Wolff <bawolff...@gmail.com>
Gerrit-Reviewer: Aaron Schulz <asch...@wikimedia.org>
Gerrit-Reviewer: Greg Grossmeier <g...@wikimedia.org>
Gerrit-Reviewer: Parent5446 <tylerro...@gmail.com>
Gerrit-Reviewer: jenkins-bot
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