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3 commits

Author SHA1 Message Date
epriestley
74d5ae7bec Clean up some log spam caused by races in VersionedDraft
Summary:
Two minor issues that I caught in the log while fixing Phame permissions:

  - We had a JS bug which would cause us to immediately generate two comment previews at the exact same time -- one for loading the page, and one for "switching to desktop". Instead, only generate the "switch to desktop" preview if we really switched to desktop from a different device layout.
  - These two requests could end up reading/writing the VersionedDraft table at exactly the same time fairly often (e.g., after a comment submission, the page would load, send two preview requests at exactly the same time, and they'd race fairly reliably for me locally). If we do race, recover from the race.

Test Plan:
Submitted some Phame comments.

  - No more error log errors about VersionedDraft keys.
  - Saw only one preview request when loading the page instead of two.

Here's the specific stack trace I caught:

```
[Mon Sep 05 12:15:33.639930 2016] [:error] [pid 50608] [client 127.0.0.1:55278] [2016-09-05 14:15:33] EXCEPTION: (AphrontDuplicateKeyQueryException) #1062: Duplicate entry 'PHID-POST-fknnpzjnsdgc3rqobhst-PHID-USER-pr5rjpuilpfserepsd2k-13' for key 'key_object' at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:314]
[Mon Sep 05 12:15:33.640801 2016] [:error] [pid 50608] [client 127.0.0.1:55278] arcanist(head=master, ref.master=9e82ef979e81), corgi(head=master, ref.master=5b9171222bc9), instances(head=stable, ref.master=485bc8128198, ref.stable=2983bc917601), ledger(head=master, ref.master=4da4a24b8779), libcore(), phabricator(head=phame2, ref.master=4b6da9735ba7, ref.phame2=4b6da9735ba7), phutil(head=stable, ref.master=97f05269fdb1, ref.stable=c14343ee620e), services(head=stable, ref.master=1fcb5cdb7582, ref.stable=2d8088a5b4b3)
[Mon Sep 05 12:15:33.640815 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #0 <#2> AphrontBaseMySQLDatabaseConnection::throwCommonException(integer, string) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:348]
[Mon Sep 05 12:15:33.640830 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #1 <#2> AphrontBaseMySQLDatabaseConnection::throwQueryCodeException(integer, string) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:289]
[Mon Sep 05 12:15:33.640833 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #2 <#2> AphrontBaseMySQLDatabaseConnection::throwQueryException(mysqli) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:185]
[Mon Sep 05 12:15:33.640836 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #3 <#2> AphrontBaseMySQLDatabaseConnection::executeRawQuery(string) called at [<phutil>/src/xsprintf/queryfx.php:8]
[Mon Sep 05 12:15:33.640839 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #4 <#2> queryfx(AphrontMySQLiDatabaseConnection, string, string, string, array, string)
[Mon Sep 05 12:15:33.640841 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #5 <#2> call_user_func_array(string, array) called at [<phutil>/src/aphront/storage/connection/AphrontDatabaseConnection.php:42]
[Mon Sep 05 12:15:33.640844 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #6 <#2> AphrontDatabaseConnection::query(string, string, string, array, string) called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1261]
[Mon Sep 05 12:15:33.640846 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #7 <#2> LiskDAO::insertRecordIntoDatabase(string) called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1106]
[Mon Sep 05 12:15:33.640849 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #8 <#2> LiskDAO::insert() called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1075]
[Mon Sep 05 12:15:33.640851 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #9 <#2> LiskDAO::save() called at [<phabricator>/src/applications/draft/storage/PhabricatorVersionedDraft.php:65]
[Mon Sep 05 12:15:33.640854 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #10 <#2> PhabricatorVersionedDraft::loadOrCreateDraft(string, string, integer) called at [<phabricator>/src/applications/transactions/editengine/PhabricatorEditEngine.php:1669]
[Mon Sep 05 12:15:33.640857 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #11 <#2> PhabricatorEditEngine::buildCommentResponse(PhamePost) called at [<phabricator>/src/applications/transactions/editengine/PhabricatorEditEngine.php:894]
[Mon Sep 05 12:15:33.640859 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #12 <#2> PhabricatorEditEngine::buildResponse() called at [<phabricator>/src/applications/phame/controller/post/PhamePostEditController.php:60]
[Mon Sep 05 12:15:33.640862 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #13 <#2> PhamePostEditController::handleRequest(AphrontRequest) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:237]
[Mon Sep 05 12:15:33.640865 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #14 phlog(AphrontDuplicateKeyQueryException) called at [<phabricator>/src/aphront/handler/PhabricatorAjaxRequestExceptionHandler.php:27]
[Mon Sep 05 12:15:33.640868 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #15 PhabricatorAjaxRequestExceptionHandler::handleRequestException(AphrontRequest, AphrontDuplicateKeyQueryException) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:644]
[Mon Sep 05 12:15:33.640870 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #16 AphrontApplicationConfiguration::handleException(AphrontDuplicateKeyQueryException) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:242]
[Mon Sep 05 12:15:33.640873 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #17 AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink, MultimeterControl) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:149]
[Mon Sep 05 12:15:33.640879 2016] [:error] [pid 50608] [client 127.0.0.1:55278]   #18 AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phabricator>/webroot/index.php:17]
```

Reviewers: chad

Reviewed By: chad

Differential Revision: https://secure.phabricator.com/D16494
2016-09-05 13:01:53 -07:00
epriestley
1fcdcddd5f Fix EditEngine preview/draft for first comment on a task you didn't create
Summary: Ref T9132. See T9908#147038.

Test Plan:
  - As user A, created a new task.
  - As user B, started typing a comment on it (with no prior activity).
  - Users A and B must be different.

Before patch: preview/draft don't work, trace in error log (see above).

After patch: preview/draft work.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9132

Differential Revision: https://secure.phabricator.com/D14678
2015-12-05 09:57:45 -08:00
epriestley
b82863d972 Implement versioned drafts in EditEngine comment forms
Summary:
Ref T9132. Fixes T5031. This approximately implements the plan described in T5031#67988:

When we recieve a preview request, don't write a draft if the form is from a version of the object before the last update the viewer made.

This should fix the race-related (?) zombie draft comments that sometimes show up.

I just added a new object for this stuff to make it easier to do stacked actions (or whatever we end up with) a little later, since I needed to do some schema adjustments anyway.

Test Plan:
  - Typed some text.
  - Reloaded page.
  - Draft stayed there.
  - Tried real hard to get it to ghost by submitting stuff in multiple windows and typing a lot and couldn't, although I didn't bother specifically narrowing down the race condition.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T5031, T9132

Differential Revision: https://secure.phabricator.com/D14640
2015-12-03 07:07:29 -08:00