Merge "Use slave for selects in CategoryMembershipJob"

diff --git a/includes/jobqueue/jobs/CategoryMembershipChangeJob.php b/includes/jobqueue/jobs/CategoryMembershipChangeJob.php
index a6869c1..d34ea41 100644 (file)
--- a/includes/jobqueue/jobs/CategoryMembershipChangeJob.php
+++ b/includes/jobqueue/jobs/CategoryMembershipChangeJob.php
@@ -63,13 +63,21 @@ class CategoryMembershipChangeJob extends Job {
                // between COMMIT and actual enqueueing of the CategoryMembershipChangeJob job.
                $cutoffUnix -= self::ENQUEUE_FUDGE_SEC;
 
+               $dbr = wfGetDB( DB_SLAVE, array( 'recentchanges' ) );
+               if ( !wfGetLB()->safeWaitForPos( $dbr ) ) {
+                       $this->setLastError( "Timed out while waiting for slave to catch up" );
+                       return false;
+               }
+
+               $dbr->commit( __METHOD__, 'flush' );
+
                // Get the newest revision that has a SRC_CATEGORIZE row...
-               $row = $dbw->selectRow(
+               $row = $dbr->selectRow(
                        array( 'revision', 'recentchanges' ),
                        array( 'rev_timestamp', 'rev_id' ),
                        array(
                                'rev_page' => $page->getId(),
-                               'rev_timestamp >= ' . $dbw->addQuotes( $dbw->timestamp( $cutoffUnix ) )
+                               'rev_timestamp >= ' . $dbr->addQuotes( $dbr->timestamp( $cutoffUnix ) )
                        ),
                        __METHOD__,
                        array( 'ORDER BY' => 'rev_timestamp DESC, rev_id DESC' ),
@@ -96,8 +104,8 @@ class CategoryMembershipChangeJob extends Job {
 
                // Find revisions to this page made around and after this revision which lack category
                // notifications in recent changes. This lets jobs pick up were the last one left off.
-               $encCutoff = $dbw->addQuotes( $dbw->timestamp( $cutoffUnix ) );
-               $res = $dbw->select(
+               $encCutoff = $dbr->addQuotes( $dbr->timestamp( $cutoffUnix ) );
+               $res = $dbr->select(
                        'revision',
                        Revision::selectFields(),
                        array(