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Data too long for column 'si_title'
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Hi, since upgrading to 1.33 we are seeing:

Query: REPLACE INTO `searchindex` (si_page,si_title,si_text) VALUES ('1042',' u8e6838a u8e4bca0 u8e5b7b2 u8e7bb8f u8e781ad u8e4baa1 u8e79a84 u8e5a4a7 u8e697a5 u8e69cac u8e5b89d u8e59bbd u8e58da0 u8e9a286 u8e58fb0 u8e6b9be u8efbc8c u8e5bc95 u8e58f91 u8e4b8a5 u8e9878d u8e79a84 u8e6ada6 u8e8a385 u8e8b5b7 u8e4b989 u8e586b2 u8e7aa81 u8efbc8c u8e980a0 u8e68890 u8e5a49a u8e5908d u8e690ad u8e982a3 u8e5989f u8e58aaa u8e98187 u8e5aeb3 ',' u8e4b893 u8e9a298 u8e68aa5 u8e5afbc u8e696b0 u8e997bb u8e697a5 u8e69c9f 2011 09u800 09u800 file scouts-guide-tou800-theu800-zombie-apocalypse-1u800-fullu82ejpgu800 450px u8e7bca9 u8e795a5 u8e59bbe u8e5b185 u8e4b8ad u8e4b8a7 u8e5b0b8 u8e69cab u8e697a5 u8e69da5 u8e4b8b4 u8e4b98b u8e697b6 u8efbc8c u8e4b88d u8e4bc9a u8e59ba0 u8e4b8ba u8e4bda0 u8e698af u8e5a5b3 u8e79a84 u8e5b0b1 u8e6af94 u8e8be83 u8e5aeb9 u8e69893 u8e6b4bb u8e591bd u8e59ca8 u8e5be88 u8e5a49a u8e4b8a7 u8e5b0b8 u8e9a298 u8e69d90 u8e79a84 u8e794b5 u8e5bdb1 u8e983bd u8e698af u8e794b7 u8e4baba u8e68bbf u8e79d80 u8e69eaa u8e69e9d u8e68896 u8e698af u8e58880 u8e696a7 u8e79083 u8e6a392 u8e59ca8 u8e4bf9d u8e68aa4 u8e99a8f u8e8a18c u8e79a84 u8e5a5b3 u8e680a7 u8efbc8c u8e4bd86 u8e698af u8e5a682 u8e69e9c u8e4b8a7 u8e5b0b8 u8e69cab u8e697a5 u8e79c9f u8e79a84 u8e69da5 u8e4b8b4 u8e4ba86 u8efbc8c u8e8808c u8e8baab u8e8beb9 u8e58faf u8e4be9d u8e8b596 u8e79a84 u8e794b7 u8e4baba u8e4b88d u8e698af u8e6adbb u8e58589 u8e4ba86 u8e5b0b1 u8e698af u8e4b99f u8e5bc82 u8e58f98 u8e68890 u8e4b8a7 u8e5b0b8 u8e8aea9 u8e4bda0 u8e7bb99 kou800 u8e4ba86 u8efbc8c u8e8bf99 u8e697b6 u8e69cab u8e697a5 u8e79a84 u8e5a5b3 u8e58a9b u8e5b0b1 u8e698af u8e58f91 u8e68ca5 u8e79a84 u8e697b6 u8e588bb u8efbc8c u8e5a682 u8e4bd95 u8e59ca8 u8e8bf99 u8e6b7b7 u8e4b9b1 u8e79a84 u8e5b180 u8e99da2 u8e4b88b u8e7be8e u8e7be8e u8e79a84 u8e4bf9d u8e4bd8f u8e887aa u8e5b7b1 u8e4b880 u8e69da1 u8e5b08f u8e591bd u8efbc9f * u8e59ba0 u8e4b8ba u8e5a5b3 u8e7949f u8e79a84 u8e5a4b4 u8e58f91 u8e995bf u8efbc8c u8e59ca8 u8e5be97 u8e4bf9d u8e68aa4 u8e887aa u8e5b7b1 u8e79a84 u8e697b6 u8e58099 u8efbc8c u8e69c80 u8e5a5bd u8e5b086 u8e5a4b4 u8e58f91 u8e7bb91 u8e68890 u8e8beab u8e5ad90 u8e69c80 u8e4b88d u8e4bc9a u8e695a3 u8e890bd u8e6b2be u8e588b0 u8e6b3a5 u8e59c9f u8e8a180 u8e6b1a1 u8e38082 file dfzz1fauyaeug0lu82ejpgu800 450px u8e7bca9 u8e795a5 u8e59bbe u8e5b185 u8e4b8ad u8e68980 u8e4bba5 u8e7bb91 u8e8beab u8e5ad90 u8e6898d u8e698af u8e78e8b u8e98193 * u8e983bd u8e5b7b2 u8e7bb8f u8e99da2 u8e4b8b4 u8e4b896 u8e7958c u8e69cab u8e697a5 u8e4ba86 u8efbc8c u8e68980 u8e4bba5 u8e4b99f u8e4b88d u8e4bc9a u8e69c89 u8e4bb80 u8e4b988 u8e58c96 u8e5a686 u8e59381 u8e68896 u8e981ae u8e79195 u8e8868f u8e58faf u8e4bba5 u8e981ae u8e4bd8f u8e683b3 u8e981ae u8e79195 u8e79a84 u8e983a8 u8e4bd8d u8efbc8c u8e68980 u8e4bba5 u8e8bf99 u8e697b6 u8e99a8f u8e4bebf u8e68bbf u8e4b8aa u8e6b3a5 u8e5b7b4 u8e68896 u8e698af u8e8a180 u8e6b88d u8e5b0b1 u8e5b086 u8e5b0b1 u8e4ba86 u8efbc8c u8e5bd93 u8e784b6 u8e6b682 u8e5be97 u8e5a4aa u8e5a49a u8e6909e u8e4b88d u8e5a5bd u8e4bc9a u8e8aea9 u8e585b6 u8e5ae83 u8e79a84 u8e7949f u8e8bf98 u8e88085 u8e8afaf u8e8aea4 u8e4b8ba u8e698af u8e4b8a7 u8e5b0b8 u8e38082 file 11af666aa1cu82ejpgu800 450px u8e7bca9 u8e795a5 u8e59bbe u8e5b185 u8e4b8ad u8e4b88d u8e8bf87 u8e8bf99 u8e5bca0 u8e59bbe u8e5a5bd u8e5838f u8e69186 u8e99499 u8e4ba86 u8efbc8c u8e59ba0 u8e4b8ba u8e4b88d u8e7aea1 u8e6808e u8e4b988 u8e79c8b u8e983bd u8e5838f u8e698af u8e4b8a7 u8e5b0b8 * u8e5a682 u8e69e9c u8e880b3 u8e78eaf u8e68e89 u8e4ba86 u8e4b880 u8e8beb9 u8e5b0b1 u8e8aea9 u8e5ae83 u8e68e89 u8e4ba86 u8e590a7 u8efbc8c u8e983bd u8e5b7b2 u8e7bb8f u8e698af u8e4b8a7 u8e5b0b8 u8e69cab u8e697a5 u8e4ba86 u8efbc8c u8e8b081 u8e8bf98 u8e7aea1 u8e4bda0 u8e688b4 u8e4b88d u8e688b4 u8e880b3 u8e78eaf u8e79a84 u8efbc9f u8e68896 u8e8aeb8 u8e58faa u8e688b4 u8e4b880 u8e8beb9 u8e79a84 u8e880b3 u8e78eaf u8e59ca8 u8e69cab u8e697a5 u8e697b6 u8e698af u8e4b880 u8e7a78d u8e697b6 u8e5b09a u8e6b581 u8e8a18c u8e38082 u8e4bd86 u8e698af u8e8bf98 u8e698af u8e5be97 u8e6b3a8 u8e6848f u8e79a84 u8e698af u8e5b0bd u8e9878f u8e588ab u8e688b4 u8e59e82 u8e5908a u8e4b88b u8e69da5 u8e79a84 u8e880b3 u8e78eaf u8efbc8c u8e59ba0 u8e4b8ba u8e5aeb9 u8e69893 u8e59ca8 u8e68898 u8e69697 u8e4b8ad u8e8a2ab u8e58bbe u8e689af u8e588b0 u8e38082 file p6crn6ozkkcbu82ejpgu800 450px u8e7bca9 u8e795a5 u8e59bbe u8e5b185 u8e4b8ad u8e8bf99 u8e7a78d u8e5a4b9 u8e59ca8 u8e880b3 u8e59e82 u8e4b88a u8e79a84 u8e880b3 u8e78eaf u8e4b99f u8e698af u8e4b88d u8e99499 u8e79a84 u8e98089 u8e68ba9 ')
Function: SearchMySQL::update
Error: 1406 Data too long for column 'si_title' at row 1 (xxx)

#0 /srv/mediawiki/w/includes/libs/rdbms/database/Database.php(1556): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#1 /srv/mediawiki/w/includes/libs/rdbms/database/Database.php(1274): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#2 /srv/mediawiki/w/includes/libs/rdbms/database/Database.php(2927): Wikimedia\Rdbms\Database->query(string, string)
#3 /srv/mediawiki/w/includes/libs/rdbms/database/DatabaseMysqlBase.php(528): Wikimedia\Rdbms\Database->nativeReplace(string, array, string)
#4 /srv/mediawiki/w/includes/search/SearchMySQL.php(349): Wikimedia\Rdbms\DatabaseMysqlBase->replace(string, array, array, string)
#5 /srv/mediawiki/w/includes/deferred/SearchUpdate.php(108): SearchMySQL->update(integer, string, string)
#6 /srv/mediawiki/w/includes/deferred/DeferredUpdates.php(274): SearchUpdate->doUpdate()
#7 /srv/mediawiki/w/includes/deferred/DeferredUpdates.php(219): DeferredUpdates::runUpdate(SearchUpdate, Wikimedia\Rdbms\LBFactoryMulti, string, integer)
#8 /srv/mediawiki/w/includes/deferred/DeferredUpdates.php(143): DeferredUpdates::execute(array, string, integer)
#9 /srv/mediawiki/w/includes/MediaWiki.php(907): DeferredUpdates::doUpdates(string)
#10 /srv/mediawiki/w/includes/MediaWiki.php(731): MediaWiki->restInPeace(string, boolean)
#11 /srv/mediawiki/w/includes/MediaWiki.php(754): MediaWiki->{closure}()
#12 /srv/mediawiki/w/includes/MediaWiki.php(548): MediaWiki->doPostOutputShutdown(string)
#13 /srv/mediawiki/w/index.php(42): MediaWiki->run()
#14 {main}

In the logs.

We also run php 7.2.

Event Timeline

Restricted Application added a subscriber: Aklapper. · View Herald Transcript

Change 533932 had a related patch set uploaded (by Paladox; owner: Paladox):
[mediawiki/core@master] Remove limit from si_title in searchindex

https://gerrit.wikimedia.org/r/533932

It seems like si_title relates to page_title. If the code is trying to insert a longer value, most likely, the problem is with the value. Making the database table wider would hide the problem, not solve it.

Which page title is it trying to insert? What kind of user action or edit is triggering it?

@Paladox Does that look like a valid page title that can exist on your wiki? I assume not, which means there is a bug somewhere else causing this value to make it all the way to the SearchUpdate class - where we are protected by the last defence - the database schema. I don't think the schema should be changed.

Or, if we find this is a valid value, let's find out why it is bigger than page_title and find out how it is transformed. Then we can calculate the largest valid outcome of that transformation and use that as our new limit (and document in the schema why it is that way).

Hmm, i see it's only inserting 2 values not three (page, title and text) with the bug appearing to be that the text is being put in the title column.

Oh, i see the value. ' u8e6838a u8e4bca0 u8e5b7b2 u8e7bb8f u8e781ad u8e4baa1 u8e79a84 u8e5a4a7 u8e697a5 u8e69cac u8e5b89d u8e59bbd u8e58da0 u8e9a286 u8e58fb0 u8e6b9be u8efbc8c u8e5bc95 u8e58f91 u8e4b8a5 u8e9878d u8e79a84 u8e6ada6 u8e8a385 u8e8b5b7 u8e4b989 u8e586b2 u8e7aa81 u8efbc8c u8e980a0 u8e68890 u8e5a49a u8e5908d u8e690ad u8e982a3 u8e5989f u8e58aaa u8e98187 u8e5aeb3 ','...

T274706 may be a duplicate of this. I may note that this error also pops up for extensions like ConfirmAccount T275522 etc. Perhaps a general issue than we may think?

On thing I have to add. The wiki for which this is happening to me is using MyISAM since it is a pretty old wiki in terms of when it was created. May this be the reason?