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TypeError: Argument 1 passed to Wikimedia\Rdbms\TransactionProfiler::recordConnection() must be of the type string, null given
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Description

This error happens when setting up a new wiki on https://patchdemo.wmflabs.org/, when running the edit.php maintenance script:

TypeError: Argument 1 passed to Wikimedia\Rdbms\TransactionProfiler::recordConnection() must be of the type string, null given, called in /srv/patchdemo-wikis/78374bbd8ec1152e7332eda02d0f3ff7/w/includes/libs/rdbms/loadbalancer/LoadBalancer.php on line 1006
Backtrace:
from /srv/patchdemo-wikis/78374bbd8ec1152e7332eda02d0f3ff7/w/includes/libs/rdbms/TransactionProfiler.php(197)
#0 /srv/patchdemo-wikis/78374bbd8ec1152e7332eda02d0f3ff7/w/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1006): Wikimedia\Rdbms\TransactionProfiler->recordConnection(NULL, string, boolean)
#1 /srv/patchdemo-wikis/78374bbd8ec1152e7332eda02d0f3ff7/w/includes/libs/rdbms/loadbalancer/LoadBalancer.php(960): Wikimedia\Rdbms\LoadBalancer->getServerConnection(integer, string, integer)
#2 /srv/patchdemo-wikis/78374bbd8ec1152e7332eda02d0f3ff7/w/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1099): Wikimedia\Rdbms\LoadBalancer->getConnection(integer, array, string, integer)
#3 /srv/patchdemo-wikis/78374bbd8ec1152e7332eda02d0f3ff7/w/includes/user/User.php(819): Wikimedia\Rdbms\LoadBalancer->getConnectionRef(integer)
#4 /srv/patchdemo-wikis/78374bbd8ec1152e7332eda02d0f3ff7/w/maintenance/edit.php(64): User::newSystemUser(string, array)
#5 /srv/patchdemo-wikis/78374bbd8ec1152e7332eda02d0f3ff7/w/maintenance/doMaintenance.php(112): EditCLI->execute()
#6 /srv/patchdemo-wikis/78374bbd8ec1152e7332eda02d0f3ff7/w/maintenance/edit.php(134): require_once(string)
#7 {main}

Details

SubjectRepoBranchLines +/-
rdbms: cleanup getServer() and connection parameter fields in Databasemediawiki/coremaster+244 -181
rdbms: work around Database::getServer() returning nullmediawiki/coremaster+4 -2
rdbms: avoid undefined "expectBy" notices in TransactionProfiler (II)mediawiki/corewmf/1.36.0-wmf.35+161 -103
rdbms: avoid undefined "expectBy" notices in TransactionProfiler (II)mediawiki/coremaster+161 -103
Revert "rdbms: avoid undefined "expectBy" notices in TransactionProfiler"mediawiki/coremaster+102 -160
Revert "rdbms: Group DBPerformance logs by violated measure"mediawiki/coremaster+3 -5
Customize query in gerrit

Related Objects

Event Timeline

matmarex created this task.Mar 10 2021, 3:58 PM
Restricted Application added a project: Platform Engineering. · View Herald TranscriptMar 10 2021, 3:58 PM
Restricted Application added a subscriber: Aklapper. · View Herald Transcript
matmarex added a subscriber: Krinkle.Mar 10 2021, 4:00 PM

It started happening today, possibly caused by https://gerrit.wikimedia.org/r/c/mediawiki/core/+/666446 or https://gerrit.wikimedia.org/r/c/mediawiki/core/+/666508

Kizule subscribed.Mar 10 2021, 11:19 PM
Esanders triaged this task as High priority.Mar 11 2021, 1:41 PM
matmarex added a comment.Mar 11 2021, 7:55 PM

I will bisect and revert if no one investigates.

Krinkle added a project: Performance-Team.Mar 11 2021, 9:37 PM
• Ladsgroup subscribed.Mar 12 2021, 8:01 PM
• Ladsgroup added a comment.Mar 12 2021, 8:06 PM

Had this locally, reverting I5d106ac5c95d0ea94c4f6bdee90ca51f8f7ddbad (https://gerrit.wikimedia.org/r/c/mediawiki/core/+/666508) fixed it.

• Ladsgroup added a comment.Mar 12 2021, 8:36 PM

This is borderline UBN. Breaking master. Also some regression testing would be nice.

Krinkle assigned this task to aaron.Mar 12 2021, 8:51 PM
Krinkle moved this task from Inbox, needs triage to Doing: Prio Interrupt on the Performance-Team board.
Krinkle moved this task from Untriaged to Rdbms library on the MediaWiki-libs-Rdbms board.
gerritbot added a comment.Mar 12 2021, 10:12 PM

Change 670476 had a related patch set uploaded (by Aaron Schulz; owner: Aaron Schulz):
[mediawiki/core@master] rdbms: cleanup getServer() and connection parameter fields in Database

https://gerrit.wikimedia.org/r/670476

gerritbot added a project: Patch-For-Review.Mar 12 2021, 10:12 PM
gerritbot added a comment.Mar 12 2021, 10:14 PM

Change 671282 had a related patch set uploaded (by Aaron Schulz; owner: Aaron Schulz):
[mediawiki/core@master] rdbms: work around Database::getServer() returning null

https://gerrit.wikimedia.org/r/671282

matmarex added a comment.Mar 12 2021, 11:09 PM

The patches (when both are applied) fix the issue for me, but I'm not comfortable merging a 200-line change in database internals.

aaron added a comment.Mar 12 2021, 11:21 PM

The second one alone should be enough for a quick fix.

matmarex added a comment.Mar 13 2021, 12:05 AM

It's not:

Uncaught TypeError: Argument 1 passed to Wikimedia\Rdbms\TransactionProfiler::transactionWritingOut() must be of the type string, null given, called in /srv/patchdemo-wikis/659ccdb7732485b5980061ba1de79679/w/includes/libs/rdbms/database/Database.php on line 4699 and defined in /srv/patchdemo-wikis/659ccdb7732485b5980061ba1de79679/w/includes/libs/rdbms/TransactionProfiler.php:322
Stack trace:
#0 /srv/patchdemo-wikis/659ccdb7732485b5980061ba1de79679/w/includes/libs/rdbms/database/Database.php(4699): Wikimedia\Rdbms\TransactionProfiler->transactionWritingOut(NULL, 'patchdemo_659cc...', '9b0417', 0, 0)
#1 /srv/patchdemo-wikis/659ccdb7732485b5980061ba1de79679/w/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1952): Wikimedia\Rdbms\Database->rollback('MWExceptionHand...', 'flush')
#2 /srv/patchdemo-wikis/659ccdb7732485b5980061ba1de79679/w/includes/libs/rdbms/loadbalancer/LoadBalancer.php(2255): Wikimedia\Rdbms\LoadBalancer::Wikimedia\Rdbms\{closure}(Object(Wikimedia\Rdbms\DatabaseMysqli))
#3 /srv/patchdemo-wikis/ in /srv/patchdemo-wikis/659ccdb7732485b5980061ba1de79679/w/includes/libs/rdbms/TransactionProfiler.php on line 322
matmarex added a comment.Mar 13 2021, 12:06 AM

@aaron For testing, you can copy the Gerrit change number into https://patchdemo.wmflabs.org/, and see if it creates a wiki or fails (in which case the exception will be somewhere in the log it prints).

gerritbot added a comment.Mar 15 2021, 10:15 PM

Change 672549 had a related patch set uploaded (by Bartosz Dziewoński; owner: Bartosz Dziewoński):
[mediawiki/core@master] Revert "rdbms: Group DBPerformance logs by violated measure"

https://gerrit.wikimedia.org/r/672549

gerritbot added a comment.Mar 15 2021, 10:15 PM

Change 672550 had a related patch set uploaded (by Bartosz Dziewoński; owner: Bartosz Dziewoński):
[mediawiki/core@master] Revert "rdbms: avoid undefined "expectBy" notices in TransactionProfiler"

https://gerrit.wikimedia.org/r/672550

matmarex added a comment.Mar 15 2021, 10:19 PM

@aaron I'm sorry but I don't think it's acceptable to leave master broken for almost a week now. This bug is interfering with my work. I hope I'm not causing you too much annoyance by reverting these patches.

• Ladsgroup added a comment.Mar 15 2021, 10:24 PM

Agreeing with @matmarex, I do know a little about database internals and would be happy to review but rather smaller patches with proper tests, less duplicated code, hopefully following SOLID a bit, etc.

gerritbot added a comment.Mar 15 2021, 10:42 PM

Change 672549 merged by jenkins-bot:
[mediawiki/core@master] Revert "rdbms: Group DBPerformance logs by violated measure"

https://gerrit.wikimedia.org/r/672549

Krinkle added a comment.EditedMar 15 2021, 10:45 PM

Unfortunately the change in question contained many unrelated internal changes and refactorings, so I have no idea if it safe to revert or what other commits may have started to depend on this since then. Please keep this task open for @aaron to review after the fact, which I'm considering a train blocker for safety.

Krinkle added a parent task: T274939: 1.36.0-wmf.35 deployment blockers.Mar 15 2021, 10:45 PM
Krinkle mentioned this in T277516: Group DBPerformance logs by violated measure.
gerritbot added a comment.Mar 15 2021, 10:48 PM

Change 672550 merged by jenkins-bot:
[mediawiki/core@master] Revert "rdbms: avoid undefined "expectBy" notices in TransactionProfiler"

https://gerrit.wikimedia.org/r/672550

ReleaseTaggerBot added a project: MW-1.36-notes (1.36.0-wmf.35; 2021-03-16).Mar 15 2021, 11:00 PM
gerritbot added a comment.Mar 16 2021, 3:58 AM

Change 672555 had a related patch set uploaded (by Krinkle; owner: Aaron Schulz):
[mediawiki/core@master] rdbms: avoid undefined "expectBy" notices in TransactionProfiler (II)

https://gerrit.wikimedia.org/r/672555

gerritbot added a comment.Mar 16 2021, 4:00 AM

Change 672587 had a related patch set uploaded (by Krinkle; owner: Aaron Schulz):
[mediawiki/core@wmf/1.36.0-wmf.35] rdbms: avoid undefined "expectBy" notices in TransactionProfiler (II)

https://gerrit.wikimedia.org/r/672587

PatchDemoBot added a comment.Mar 16 2021, 4:03 AM

Test wiki created on Patch Demo by Krinkle using patch(es) linked to this task:

https://patchdemo.wmflabs.org/wikis/77aaae428fcb714755519ff4f9281982/w/

gerritbot added a comment.Mar 16 2021, 4:27 AM

Change 672555 merged by jenkins-bot:
[mediawiki/core@master] rdbms: avoid undefined "expectBy" notices in TransactionProfiler (II)

https://gerrit.wikimedia.org/r/672555

ReleaseTaggerBot edited projects, added MW-1.36-notes (1.36.0-wmf.36; 2021-03-23); removed MW-1.36-notes (1.36.0-wmf.35; 2021-03-16).Mar 16 2021, 5:00 AM
• Ladsgroup added a comment.Mar 16 2021, 8:59 AM

It seems it's not a blocker anymore. Can you remove it?

Krinkle added a comment.Mar 16 2021, 12:51 PM

Backport hasn't landed yet.

• Ladsgroup added a comment.Mar 16 2021, 12:52 PM

oh sorry I thought the merged one was the backport

• AMooney moved this task from Inbox to Tracking/Watching on the Platform Engineering board.Mar 16 2021, 2:28 PM
gerritbot added a comment.Mar 16 2021, 6:06 PM

Change 672587 merged by jenkins-bot:
[mediawiki/core@wmf/1.36.0-wmf.35] rdbms: avoid undefined "expectBy" notices in TransactionProfiler (II)

https://gerrit.wikimedia.org/r/672587

dancy subscribed.Mar 16 2021, 6:13 PM

@Ladsgroup The backport has been merged.

dancy removed a parent task: T274939: 1.36.0-wmf.35 deployment blockers.Mar 16 2021, 6:23 PM
ReleaseTaggerBot edited projects, added MW-1.36-notes (1.36.0-wmf.35; 2021-03-16); removed MW-1.36-notes (1.36.0-wmf.36; 2021-03-23).Mar 16 2021, 7:00 PM
Krinkle closed this task as Resolved.Mar 18 2021, 1:34 AM
gerritbot added a comment.Mar 30 2021, 6:15 PM

Change 671282 abandoned by Aaron Schulz:
[mediawiki/core@master] rdbms: work around Database::getServer() returning null

Reason:
obsolete

https://gerrit.wikimedia.org/r/671282

gerritbot added a comment.May 5 2021, 8:10 PM

Change 670476 merged by jenkins-bot:

[mediawiki/core@master] rdbms: cleanup getServer() and connection parameter fields in Database

https://gerrit.wikimedia.org/r/670476

Maintenance_bot removed a project: Patch-For-Review.May 5 2021, 9:10 PM
PatchDemoBot added a comment.Aug 13 2021, 7:02 PM

Test wiki on Patch Demo by Krinkle using patch(es) linked to this task was deleted:

https://patchdemo.wmflabs.org/wikis/77aaae428fcb714755519ff4f9281982/w/

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