3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
16 * http://www.gnu.org/copyleft/gpl.html
18 * @ingroup Maintenance
21 require_once( dirname(__FILE__
) . '/Maintenance.php' );
23 class FixSlaveDesync
extends Maintenance
{
24 public function __construct() {
25 global $wgUseRootUser;
26 $wgUseRootUser = true;
28 parent
::__construct();
29 $this->mDescription
= "";
33 public function execute() {
34 global $slaveIndexes, $wgDBservers;
35 $slaveIndexes = array();
36 for ( $i = 1; $i < count( $wgDBservers ); $i++
) {
37 if ( wfGetLB()->isNonZeroLoad( $i ) ) {
42 if ( $this->hasArg() ) {
43 $this->desyncFixPage( $this->getArg() );
45 $dbw = wfGetDB( DB_MASTER
);
46 $maxPage = $dbw->selectField( 'page', 'MAX(page_id)', false, __METHOD__
);
47 $corrupt = $this->findPageLatestCorruption();
48 foreach ( $corrupt as $id => $dummy ) {
49 $this->desyncFixPage( $id );
55 * Find all pages that have a corrupted page_latest
58 private function findPageLatestCorruption() {
61 $dbw = wfGetDB( DB_MASTER
);
63 $res = $dbw->select( 'page', array( 'page_id', 'page_latest' ), array( 'page_id<6054123' ), __METHOD__
);
64 $this->output( "Number of pages: " . $dbw->numRows( $res ) . "\n" );
65 foreach ( $res as $row ) {
66 $masterIDs[$row->page_id
] = $row->page_latest
;
67 if ( !( ++
$n %
10000 ) ) {
68 $this->output( "$n\r" );
71 $this->output( "\n" );
72 $dbw->freeResult( $res );
75 foreach ( $slaveIndexes as $i ) {
77 $res = $db->select( 'page', array( 'page_id', 'page_latest' ), array( 'page_id<6054123' ), __METHOD__
);
78 foreach ( $res as $row ) {
79 if ( isset( $masterIDs[$row->page_id
] ) && $masterIDs[$row->page_id
] != $row->page_latest
) {
80 $desync[$row->page_id
] = true;
81 $this->output( $row->page_id
. "\t" );
84 $db->freeResult( $res );
86 $this->output( "\n" );
91 * Fix a broken page entry
92 * @param $pageID int The page_id to fix
94 private function desyncFixPage( $pageID ) {
97 # Check for a corrupted page_latest
98 $dbw = wfGetDB( DB_MASTER
);
100 $realLatest = $dbw->selectField( 'page', 'page_latest', array( 'page_id' => $pageID ),
101 __METHOD__
, 'FOR UPDATE' );
102 #list( $masterFile, $masterPos ) = $dbw->getMasterPos();
104 foreach ( $slaveIndexes as $i ) {
107 if ( !$db->masterPosWait( $masterFile, $masterPos, 10 ) ) {
108 $this->output( "Slave is too lagged, aborting\n" );
113 $latest = $db->selectField( 'page', 'page_latest', array( 'page_id' => $pageID ), __METHOD__
);
114 $max = $db->selectField( 'revision', 'MAX(rev_id)', false, __METHOD__
);
115 if ( $latest != $realLatest && $realLatest < $max ) {
116 $this->output( "page_latest corrupted in page $pageID, server $i\n" );
122 $this->output( "page_id $pageID seems fine\n" );
127 # Find the missing revisions
128 $res = $dbw->select( 'revision', array( 'rev_id' ), array( 'rev_page' => $pageID ),
129 __METHOD__
, 'FOR UPDATE' );
130 $masterIDs = array();
131 foreach ( $res as $row ) {
132 $masterIDs[] = $row->rev_id
;
134 $dbw->freeResult( $res );
136 $res = $db->select( 'revision', array( 'rev_id' ), array( 'rev_page' => $pageID ), __METHOD__
);
138 foreach ( $res as $row ) {
139 $slaveIDs[] = $row->rev_id
;
141 $db->freeResult( $res );
142 if ( count( $masterIDs ) < count( $slaveIDs ) ) {
143 $missingIDs = array_diff( $slaveIDs, $masterIDs );
144 if ( count( $missingIDs ) ) {
145 $this->output( "Found " . count( $missingIDs ) . " lost in master, copying from slave... " );
153 $missingIDs = array_diff( $masterIDs, $slaveIDs );
154 if ( count( $missingIDs ) ) {
155 $this->output( "Found " . count( $missingIDs ) . " missing revision(s), copying from master... " );
165 foreach ( $missingIDs as $rid ) {
166 $this->output( "$rid " );
168 $row = $dbFrom->selectRow( 'revision', '*', array( 'rev_id' => $rid ), __METHOD__
);
170 $id = $dbw->selectField( 'revision', 'rev_id', array( 'rev_id' => $rid ),
171 __METHOD__
, 'FOR UPDATE' );
173 $this->output( "Revision already exists\n" );
177 $dbw->insert( 'revision', get_object_vars( $row ), __METHOD__
, 'IGNORE' );
180 foreach ( $slaveIndexes as $i ) {
182 $db->insert( 'revision', get_object_vars( $row ), __METHOD__
, 'IGNORE' );
187 $row = $dbFrom->selectRow( 'text', '*', array( 'old_id' => $row->rev_text_id
), __METHOD__
);
189 $dbw->insert( 'text', get_object_vars( $row ), __METHOD__
, 'IGNORE' );
191 foreach ( $slaveIndexes as $i ) {
193 $db->insert( 'text', get_object_vars( $row ), __METHOD__
, 'IGNORE' );
197 $this->output( "done\n" );
201 $this->output( "Fixing page_latest... " );
203 #$dbw->update( 'page', array( 'page_latest' => $realLatest ), array( 'page_id' => $pageID ), __METHOD__ );
205 foreach ( $slaveIndexes as $i ) {
207 $db->update( 'page', array( 'page_latest' => $realLatest ), array( 'page_id' => $pageID ), __METHOD__
);
210 $this->output( "done\n" );
216 $maintClass = "FixSlaveDesync";
217 require_once( DO_MAINTENANCE
);