Server: Exception during scan

[Tas-sos]

After updating from version 13.0.2 to the latest 13.0.2, I execute the following command:
sudo -u www-data php console.php files:scan --all

while for all users, the process went smoothly, to my user (where is the most active), i got the following Exception during scan :

sudo -u www-data php console.php files:scan --all

Scanning files for 12 users
Starting scan for user 1 out of 12 (User1)
Starting scan for user 2 out of 12 (User2)
Starting scan for user 3 out of 12 (User3)
Starting scan for user 4 out of 12 (User4)
Starting scan for user 5 out of 12 (User5)
Starting scan for user 6 out of 12 (User6)
Starting scan for user 7 out of 12 (User7)
Starting scan for user 8 out of 12 (User8)
Starting scan for user 9 out of 12 (User9)
Starting scan for user 10 out of 12 (Tassos)
Exception during scan: "files/f7bb502511a4e01b563a85f673b1735c" is locked
#0 /var/www/nextcloud/lib/private/Files/Storage/Common.php(709): OC\Lock\DBLockingProvider->acquireLock('files/f7bb50251...', 2)
#1 /var/www/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php(592): OC\Files\Storage\Common->acquireLock('scanner::', 2, Object(OC\Lock\DBLockingProvider))
#2 /var/www/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php(592): OC\Files\Storage\Wrapper\Wrapper->acquireLock('scanner::', 2, Object(OC\Lock\DBLockingProvider))
#3 /var/www/nextcloud/lib/private/Files/Cache/Scanner.php(331): OC\Files\Storage\Wrapper\Wrapper->acquireLock('scanner::', 2, Object(OC\Lock\DBLockingProvider))
#4 /var/www/nextcloud/lib/private/Files/Utils/Scanner.php(244): OC\Files\Cache\Scanner->scan('', true, 3)
#5 /var/www/nextcloud/apps/files/lib/Command/Scan.php(161): OC\Files\Utils\Scanner->scan('/Tassos')
#6 /var/www/nextcloud/apps/files/lib/Command/Scan.php(234): OCA\Files\Command\Scan->scanFiles('Tassos', '/Tassos', false, Object(Symfony\Component\Console\Output\ConsoleOutput), false)
#7 /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php(264): OCA\Files\Command\Scan->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#8 /var/www/nextcloud/core/Command/Base.php(161): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#9 /var/www/nextcloud/3rdparty/symfony/console/Application.php(874): OC\Core\Command\Base->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#10 /var/www/nextcloud/3rdparty/symfony/console/Application.php(228): Symfony\Component\Console\Application->doRunCommand(Object(OCA\Files\Command\Scan), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#11 /var/www/nextcloud/3rdparty/symfony/console/Application.php(130): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#12 /var/www/nextcloud/lib/private/Console/Application.php(173): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#13 /var/www/nextcloud/console.php(90): OC\Console\Application->run()
#14 {main}
Starting scan for user 11 out of 12 (User10)
Starting scan for user 12 out of 12 (User11)

Server configuration

Operating system:
Ubuntu server 16.04.4 LTS

Web server:
Apache/2.4.18 (Ubuntu)

Database:
mysql Ver 15.1 Distrib 10.0.34-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2

PHP version:

HP 7.0.28-0ubuntu0.16.04.1 (cli) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
    with Zend OPcache v7.0.28-0ubuntu0.16.04.1, Copyright (c) 1999-2017, by Zend Technologies

Nextcloud version:
Nextcloud 13.0.2

Updated from an older Nextcloud/ownCloud or fresh install:
Nextcloud 13.0.1

Where did you install Nextcloud from:

Signing status:

Signing status

No errors have been found.

List of activated apps:

App list

Enabled:
  - activity: 2.6.1
  - admin_audit: 1.3.0
  - admin_notifications: 1.0.1
  - bruteforcesettings: 1.0.3
  - checksum: 0.4.0
  - comments: 1.3.0
  - dav: 1.4.6
  - deck: 0.3.1
  - federatedfilesharing: 1.3.1
  - federation: 1.3.0
  - files: 1.8.0
  - files_external: 1.4.1
  - files_markdown: 2.0.4
  - files_pdfviewer: 1.2.1
  - files_rightclick: 0.8.4
  - files_sharing: 1.5.0
  - files_texteditor: 2.5.1
  - files_trashbin: 1.3.0
  - files_versions: 1.6.0
  - files_videoplayer: 1.2.0
  - firstrunwizard: 2.2.1
  - gallery: 18.0.0
  - logreader: 2.0.0
  - lookup_server_connector: 1.1.0
  - nextcloud_announcements: 1.2.0
  - notifications: 2.1.2
  - oauth2: 1.1.0
  - passman: 2.1.4
  - password_policy: 1.3.0
  - provisioning_api: 1.3.0
  - quota_warning: 1.2.0
  - serverinfo: 1.3.0
  - sharebymail: 1.3.0
  - spreed: 3.2.0
  - survey_client: 1.1.0
  - systemtags: 1.3.0
  - theming: 1.4.1
  - twofactor_backupcodes: 1.2.3
  - updatenotification: 1.3.0
  - workflowengine: 1.3.0
Disabled:
  - encryption
  - user_external
  - user_ldap

Nextcloud configuration:

Config report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "cloud.g-lts.info"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "https:\/\/cloud.g-lts.info",
        "dbtype": "mysql",
        "version": "13.0.2.1",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "UTC",
        "installed": true,
        "mail_smtpmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpsecure": "ssl",
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpauth": 1,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "maintenance": false,
        "theme": "",
        "loglevel": 2,
        "updater.secret": "***REMOVED SENSITIVE VALUE***"
    }
}

[MorrisJobke]

We improved the lock handling in the upcoming 13.0.3:

9566, #9391 and #9389

Please try again with this release and report if this still is a problem on 13.0.3

Thanks.

[benedikt-buchert]

Just updated to 13.0.3 and still running into this issue with an external smb mount: Exception during scan:

Exception during scan: "files/654f4a05ab41de4809b18ff209c83f17" is locked
#0 /usr/share/webapps/nextcloud/lib/private/Files/Storage/Common.php(709): OC\Lock\DBLockingProvider->acquireLock('files/654f4a05a...', 2)
#1 /usr/share/webapps/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php(592): OC\Files\Storage\Common->acquireLock('scanner::', 2, Object(OC\Lock\DBLockingProvider))
#2 /usr/share/webapps/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php(592): OC\Files\Storage\Wrapper\Wrapper->acquireLock('scanner::', 2, Object(OC\Lock\DBLockingProvider))
#3 /usr/share/webapps/nextcloud/lib/private/Files/Cache/Scanner.php(331): OC\Files\Storage\Wrapper\Wrapper->acquireLock('scanner::', 2, Object(OC\Lock\DBLockingProvider))
#4 /usr/share/webapps/nextcloud/lib/private/Files/Utils/Scanner.php(244): OC\Files\Cache\Scanner->scan('', true, 3)
#5 /usr/share/webapps/nextcloud/apps/files/lib/Command/Scan.php(161): OC\Files\Utils\Scanner->scan('/admin/files/Po...')
#6 /usr/share/webapps/nextcloud/apps/files/lib/Command/Scan.php(234): OCA\Files\Command\Scan->scanFiles('admin', '/admin/files/Po...', false, Object(Symfony\Component\Console\Output\ConsoleOutput), false)
#7 /usr/share/webapps/nextcloud/3rdparty/symfony/console/Command/Command.php(264): OCA\Files\Command\Scan->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#8 /usr/share/webapps/nextcloud/core/Command/Base.php(161): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#9 /usr/share/webapps/nextcloud/3rdparty/symfony/console/Application.php(874): OC\Core\Command\Base->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#10 /usr/share/webapps/nextcloud/3rdparty/symfony/console/Application.php(228): Symfony\Component\Console\Application->doRunCommand(Object(OCA\Files\Command\Scan), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#11 /usr/share/webapps/nextcloud/3rdparty/symfony/console/Application.php(130): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#12 /usr/share/webapps/nextcloud/lib/private/Console/Application.php(173): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#13 /usr/share/webapps/nextcloud/console.php(90): OC\Console\Application->run()
#14 /usr/share/webapps/nextcloud/occ(11): require_once('/usr/share/weba...')
#15 {main}

[MorrisJobke]

@icewind1991 any idea?

[adamoell]

I experienced this after a power cut during a scan operation. What fixed it for me was clearing the memcache - as I am using redis, this involved running (as root):
redis-cli FLUSHALL
Worth a try...

[ChristophWurst]

I'm closing this ticket because it hasn't received any updates in a long time. If this is still relevant, feel free to re-open or file a new ticket.

Thank you.

[fvenegaszeke]

I experienced this after a power cut during a scan operation. What fixed it for me was clearing the memcache - as I am using redis, this involved running (as root):
redis-cli FLUSHALL
Worth a try...

This worked
Pc shutdown in mid scan and the error showed up, doing redis-cli FLUSHALL fixed it