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fix: file size in cache is set back to zero if empty content is writt… #39016

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fix: file size in cache is set back to zero if empty content is writt… #39016

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DeepDiver1975
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…en to a non-empty file

Description

When writing zero length content to a non-empty file the file size in the file cache was not updated.

How Has This Been Tested?

see provided test

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Database schema changes (next release will require increase of minor version instead of patch)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Technical debt
  • Tests only (no source changes)

Checklist:

  • Code changes
  • Unit tests added
  • Acceptance tests added
  • Documentation ticket raised:
  • Changelog item, see TEMPLATE

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update-docs bot commented Jul 16, 2021

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

@DeepDiver1975 DeepDiver1975 self-assigned this Jul 16, 2021
@DeepDiver1975 DeepDiver1975 force-pushed the fix/update-cache-size-when-emptying-a-file branch from 7634ce8 to 53196ce Compare July 16, 2021 10:47
@phil-davis
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https://drone.owncloud.com/owncloud/core/31293/2/7
make test-php-style fails.

@DeepDiver1975 DeepDiver1975 force-pushed the fix/update-cache-size-when-emptying-a-file branch from 53196ce to aeca425 Compare July 16, 2021 11:19
@phil-davis
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Only the PHP unit tests on Oracle failed:
https://drone.owncloud.com/owncloud/core/31304/19/9

There were 1508 errors:

1) Test\Cache\FileCacheTest::testGarbageCollectOldKeys
Doctrine\DBAL\Exception\DriverException: An exception occurred while executing 'UPDATE "oc_filecache" SET "mtime" = NULL, "storage_mtime" = NULL WHERE ("mtime" IS NOT NULL OR "storage_mtime" IS NOT NULL) AND "fileid" = ?' with params [4]:

ORA-01407: cannot update ("AUTOTEST"."oc_filecache"."mtime") to NULL

/drone/src/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractOracleDriver.php:69
/drone/src/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php:182
/drone/src/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php:159
/drone/src/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Connection.php:2212
/drone/src/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Connection.php:1302
/drone/src/lib/private/DB/Connection.php:191
/drone/src/lib/private/Files/Cache/Cache.php:388
/drone/src/lib/private/Files/Cache/Updater.php:247
/drone/src/lib/private/Files/Cache/Updater.php:160
/drone/src/lib/private/Files/View.php:342
/drone/src/lib/private/Files/View.php:1239
/drone/src/lib/private/Files/View.php:776
/drone/src/lib/public/Events/EventEmitterTrait.php:50
/drone/src/lib/private/Files/View.php:786
/drone/src/lib/private/Cache/File.php:160
/drone/src/tests/lib/Cache/TestCache.php:19
/drone/src/tests/lib/Cache/FileCacheTest.php:91

Caused by
Doctrine\DBAL\Driver\OCI8\OCI8Exception: ORA-01407: cannot update ("AUTOTEST"."oc_filecache"."mtime") to NULL

/drone/src/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Driver/OCI8/OCI8Exception.php:25
/drone/src/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Driver/OCI8/OCI8Statement.php:409
/drone/src/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Connection.php:1290
/drone/src/lib/private/DB/Connection.php:191
/drone/src/lib/private/Files/Cache/Cache.php:388
/drone/src/lib/private/Files/Cache/Updater.php:247
/drone/src/lib/private/Files/Cache/Updater.php:160
/drone/src/lib/private/Files/View.php:342
/drone/src/lib/private/Files/View.php:1239
/drone/src/lib/private/Files/View.php:776
/drone/src/lib/public/Events/EventEmitterTrait.php:50
/drone/src/lib/private/Files/View.php:786
/drone/src/lib/private/Cache/File.php:160
/drone/src/tests/lib/Cache/TestCache.php:19
/drone/src/tests/lib/Cache/FileCacheTest.php:91

2) Test\Cache\FileCacheTest::testGarbageCollectLeaveRecentKeys
Exception: Missing tearDown call in Test\Cache\FileCacheTest

/drone/src/tests/lib/Traits/UserTrait.php:52
/drone/src/tests/lib/TestCase.php:127
/drone/src/tests/lib/Cache/FileCacheTest.php:55

3) Test\Cache\FileCacheTest::testGarbageCollectIgnoreLockedKeys with data set #0 (OCP\Lock\LockedException Object (...))
Exception: Missing tearDown call in Test\Cache\FileCacheTest

/drone/src/tests/lib/Traits/UserTrait.php:52
/drone/src/tests/lib/TestCase.php:127
/drone/src/tests/lib/Cache/FileCacheTest.php:55
...

The first fail might be real?

But then it complains many times about Exception: Missing tearDown call in Test\Cache\FileCacheTest

I restarted CI so we can see if the fail is "variable".

@phil-davis
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phil-davis commented Jul 16, 2021 •
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@DeepDiver1975 I used current master and tried overwriting a file with an empty file, then downloading it. The download comes back empty, which is correct. So this problem does not seem to have an externally-observable bad behavior.

Is that correct? This just fixes an internal cache problem?

@DeepDiver1975
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This just fixes and internal cache problem?

This is a pure PHP API fix from my understanding - it was discovered while working on some other app which used these functions that way ....

@AlexAndBear AlexAndBear self-requested a review July 19, 2021 08:04
@ownclouders
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💥 Acceptance tests pipeline apiFederationToRoot1-git-mariadb10.2-php7.4 failed. The build has been cancelled.

https://drone.owncloud.com/owncloud/core/31469/107/1

@DeepDiver1975 DeepDiver1975 force-pushed the fix/update-cache-size-when-emptying-a-file branch from aeca425 to 99801e4 Compare July 26, 2021 09:00
@sonarqubecloud
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Kudos, SonarCloud Quality Gate passed!    Quality Gate passed

Bug A 0 Bugs
Vulnerability A 0 Vulnerabilities
Security Hotspot A 0 Security Hotspots
Code Smell A 0 Code Smells

100.0% 100.0% Coverage
0.0% 0.0% Duplication

@phil-davis
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https://drone.owncloud.com/owncloud/core/31515/36/9
"something happened" (tm) in unit tests with Oracle.

@DeepDiver1975
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https://drone.owncloud.com/owncloud/core/31515/36/9
"something happened" (tm) in unit tests with Oracle.

🤷

@DeepDiver1975
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Screenshot from 2021-07-26 13-03-40

@DeepDiver1975
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looks like I need to fire up oracle locally one more time ....

@DeepDiver1975 DeepDiver1975 force-pushed the fix/update-cache-size-when-emptying-a-file branch from 99801e4 to 5fb41b0 Compare September 15, 2021 08:30
@ownclouders
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💥 Acceptance tests pipeline webUISharingPublic1-chrome-mariadb10.2-php7.4 failed. The build has been cancelled.

https://drone.owncloud.com/owncloud/core/32396/144/1

@DeepDiver1975 DeepDiver1975 force-pushed the fix/update-cache-size-when-emptying-a-file branch from 5d74544 to d293089 Compare September 15, 2021 09:59
@sonarqubecloud
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Kudos, SonarCloud Quality Gate passed!    Quality Gate passed

Bug A 0 Bugs
Vulnerability A 0 Vulnerabilities
Security Hotspot A 0 Security Hotspots
Code Smell A 0 Code Smells

50.0% 50.0% Coverage
0.0% 0.0% Duplication

@butonic
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butonic commented Jul 26, 2022

@DeepDiver1975 merga master or rebase to kick ci again?

@DeepDiver1975 DeepDiver1975 force-pushed the fix/update-cache-size-when-emptying-a-file branch from d293089 to a269c4a Compare November 8, 2023 11:59
@DeepDiver1975
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🙈

There were 5 failures:

1) Test\Files\Cache\UpdaterTest::testMove
Failed asserting that 0 matches expected 1699446390.

/drone/src/tests/lib/Files/Cache/UpdaterTest.php:147
phpvfscomposer:///drone/src/lib/composer/phpunit/phpunit/phpunit:106

2) Test\Files\Cache\UpdaterTest::testMoveNonExistingOverwrite
Failed asserting that 0 matches expected 1699446390.

/drone/src/tests/lib/Files/Cache/UpdaterTest.php:165
phpvfscomposer:///drone/src/lib/composer/phpunit/phpunit/phpunit:106

3) Test\Files\Cache\UpdaterTest::testUpdateStorageMTime
file mtime preserved
Failed asserting that 0 matches expected 1699446390.

/drone/src/tests/lib/Files/Cache/UpdaterTest.php:200
phpvfscomposer:///drone/src/lib/composer/phpunit/phpunit/phpunit:106

4) Test\Files\Cache\UpdaterTest::testMoveCrossStorage
Failed asserting that 0 matches expected 1699446390.

/drone/src/tests/lib/Files/Cache/UpdaterTest.php:246
phpvfscomposer:///drone/src/lib/composer/phpunit/phpunit/phpunit:106

5) Test\Files\Cache\UpdaterTest::testMoveFolderCrossStorage
Failed asserting that 0 matches expected 1699446390.

/drone/src/tests/lib/Files/Cache/UpdaterTest.php:300
phpvfscomposer:///drone/src/lib/composer/phpunit/phpunit/phpunit:106

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@AlexAndBear AlexAndBear AlexAndBear approved these changes

@jvillafanez jvillafanez jvillafanez approved these changes

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@DeepDiver1975 @phil-davis @ownclouders @butonic @jvillafanez @AlexAndBear