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-rw-r--r--maintenance/fixSlaveDesync.php246
1 files changed, 0 insertions, 246 deletions
diff --git a/maintenance/fixSlaveDesync.php b/maintenance/fixSlaveDesync.php
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--- a/maintenance/fixSlaveDesync.php
+++ /dev/null
@@ -1,246 +0,0 @@
-<?php
-/**
- * Fix erroneous page_latest values due to slave desynchronisation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- * http://www.gnu.org/copyleft/gpl.html
- *
- * @file
- * @ingroup Maintenance
- */
-
-require_once __DIR__ . '/Maintenance.php';
-
-/**
- * Maintenance script that fixes erroneous page_latest values
- * due to slave desynchronisation.
- *
- * @ingroup Maintenance
- */
-class FixSlaveDesync extends Maintenance {
- /** @var array */
- private $slaveIndexes;
-
- public function __construct() {
- parent::__construct();
- $this->mDescription = "";
- }
-
- public function getDbType() {
- return Maintenance::DB_ADMIN;
- }
-
- public function execute() {
- $this->slaveIndexes = array();
- $serverCount = wfGetLB()->getServerCount();
- for ( $i = 1; $i < $serverCount; $i++ ) {
- if ( wfGetLB()->isNonZeroLoad( $i ) ) {
- $this->slaveIndexes[] = $i;
- }
- }
-
- if ( $this->hasArg() ) {
- $this->desyncFixPage( $this->getArg() );
- } else {
- $corrupt = $this->findPageLatestCorruption();
- foreach ( $corrupt as $id => $dummy ) {
- $this->desyncFixPage( $id );
- }
- }
- }
-
- /**
- * Find all pages that have a corrupted page_latest
- * @return array
- */
- private function findPageLatestCorruption() {
- $desync = array();
- $n = 0;
- $dbw = wfGetDB( DB_MASTER );
- $masterIDs = array();
- $res = $dbw->select(
- 'page',
- array( 'page_id', 'page_latest' ),
- array( 'page_id<6054123' ),
- __METHOD__
- );
- $this->output( "Number of pages: " . $res->numRows() . "\n" );
- foreach ( $res as $row ) {
- $masterIDs[$row->page_id] = $row->page_latest;
- if ( !( ++$n % 10000 ) ) {
- $this->output( "$n\r" );
- }
- }
- $this->output( "\n" );
-
- foreach ( $this->slaveIndexes as $i ) {
- $db = wfGetDB( $i );
- $res = $db->select(
- 'page',
- array( 'page_id', 'page_latest' ),
- array( 'page_id<6054123' ),
- __METHOD__
- );
- foreach ( $res as $row ) {
- if ( isset( $masterIDs[$row->page_id] ) && $masterIDs[$row->page_id] != $row->page_latest ) {
- $desync[$row->page_id] = true;
- $this->output( $row->page_id . "\t" );
- }
- }
- }
- $this->output( "\n" );
-
- return $desync;
- }
-
- /**
- * Fix a broken page entry
- * @param int $pageID The page_id to fix
- */
- private function desyncFixPage( $pageID ) {
- # Check for a corrupted page_latest
- $dbw = wfGetDB( DB_MASTER );
- $dbw->begin( __METHOD__ );
- $realLatest = $dbw->selectField( 'page', 'page_latest', array( 'page_id' => $pageID ),
- __METHOD__, 'FOR UPDATE' );
- # list( $masterFile, $masterPos ) = $dbw->getMasterPos();
- $found = false;
- foreach ( $this->slaveIndexes as $i ) {
- $db = wfGetDB( $i );
- /*
- if ( !$db->masterPosWait( $masterFile, $masterPos, 10 ) ) {
- $this->output( "Slave is too lagged, aborting\n" );
- $dbw->commit( __METHOD__ );
- sleep(10);
- return;
- }*/
- $latest = $db->selectField( 'page', 'page_latest', array( 'page_id' => $pageID ), __METHOD__ );
- $max = $db->selectField( 'revision', 'MAX(rev_id)', false, __METHOD__ );
- if ( $latest != $realLatest && $realLatest < $max ) {
- $this->output( "page_latest corrupted in page $pageID, server $i\n" );
- $found = true;
- break;
- }
- }
- if ( !$found ) {
- $this->output( "page_id $pageID seems fine\n" );
- $dbw->commit( __METHOD__ );
-
- return;
- }
-
- # Find the missing revisions
- $res = $dbw->select( 'revision', array( 'rev_id' ), array( 'rev_page' => $pageID ),
- __METHOD__, 'FOR UPDATE' );
- $masterIDs = array();
- foreach ( $res as $row ) {
- $masterIDs[] = $row->rev_id;
- }
-
- $res = $dbw->select( 'revision', array( 'rev_id' ), array( 'rev_page' => $pageID ), __METHOD__ );
- $slaveIDs = array();
- foreach ( $res as $row ) {
- $slaveIDs[] = $row->rev_id;
- }
- if ( count( $masterIDs ) < count( $slaveIDs ) ) {
- $missingIDs = array_diff( $slaveIDs, $masterIDs );
- if ( count( $missingIDs ) ) {
- $this->output( "Found " . count( $missingIDs )
- . " lost in master, copying from slave... " );
- $dbFrom = $dbw;
- $found = true;
- $toMaster = true;
- } else {
- $found = false;
- }
- } else {
- $missingIDs = array_diff( $masterIDs, $slaveIDs );
- if ( count( $missingIDs ) ) {
- $this->output( "Found " . count( $missingIDs )
- . " missing revision(s), copying from master... " );
- $dbFrom = $dbw;
- $found = true;
- $toMaster = false;
- } else {
- $found = false;
- }
- }
-
- if ( $found ) {
- foreach ( $missingIDs as $rid ) {
- $this->output( "$rid " );
- # Revision
- $row = $dbFrom->selectRow( 'revision', '*', array( 'rev_id' => $rid ), __METHOD__ );
- if ( $toMaster ) {
- $id = $dbw->selectField( 'revision', 'rev_id', array( 'rev_id' => $rid ),
- __METHOD__, 'FOR UPDATE' );
- if ( $id ) {
- $this->output( "Revision already exists\n" );
- $found = false;
- break;
- } else {
- $dbw->insert( 'revision', get_object_vars( $row ), __METHOD__, 'IGNORE' );
- }
- } else {
- foreach ( $this->slaveIndexes as $i ) {
- $db = wfGetDB( $i );
- $db->insert( 'revision', get_object_vars( $row ), __METHOD__, 'IGNORE' );
- }
- }
-
- # Text
- $row = $dbFrom->selectRow( 'text', '*', array( 'old_id' => $row->rev_text_id ), __METHOD__ );
- if ( $toMaster ) {
- $dbw->insert( 'text', get_object_vars( $row ), __METHOD__, 'IGNORE' );
- } else {
- foreach ( $this->slaveIndexes as $i ) {
- $db = wfGetDB( $i );
- $db->insert( 'text', get_object_vars( $row ), __METHOD__, 'IGNORE' );
- }
- }
- }
- $this->output( "done\n" );
- }
-
- if ( $found ) {
- $this->output( "Fixing page_latest... " );
- if ( $toMaster ) {
- /*
- $dbw->update(
- 'page',
- array( 'page_latest' => $realLatest ),
- array( 'page_id' => $pageID ),
- __METHOD__
- );
- */
- } else {
- foreach ( $this->slaveIndexes as $i ) {
- $db = wfGetDB( $i );
- $db->update(
- 'page',
- array( 'page_latest' => $realLatest ),
- array( 'page_id' => $pageID ),
- __METHOD__
- );
- }
- }
- $this->output( "done\n" );
- }
- $dbw->commit( __METHOD__ );
- }
-}
-
-$maintClass = "FixSlaveDesync";
-require_once RUN_MAINTENANCE_IF_MAIN;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-22 00:07:05 +0000