503 Storage is temporarily not available

[LuCu11]

Steps to reproduce

1. Samba Share on selfhosted Server, connected via SMB/CIFS
2. Connect from Win7 via WebDAV
3. Connect via Nextcloud Android App

Expected behaviour

equal if I connect via Windows WebDAV or Nextcloud Android App, I can connecet to the samba storage via the nextcloud service

Actual behaviour

After some time, when I connect via Windows 7 WebDAV, integrated with drive letter, i can´t access the strage and get a 503 Storage is temporarily not available message in the nextcloud.log, also in the apache-log
after some further minutes, i works fine, after some further minutes it works not, it seems it has something todo sessions?!

Server configuration

Operating system:
Debian 8.7
Web server:
apache 2.4.10
Database:
mysql 5.5.54
PHP version:
5.6.30
Nextcloud version: (see Nextcloud admin page)
11.0.2
Updated from an older Nextcloud/ownCloud or fresh install:
fresh install
Where did you install Nextcloud from:

Signing status:

Signing status

No errors have been found.

List of activated apps:

App list

• activity: 2.4.1
• bookmarks: 0.9.1
• calendar: 1.5.1
• comments: 1.1.0
• contacts: 1.5.3
• dav: 1.1.1
• direct_menu: 0.10.0
• external: true
• federatedfilesharing: 1.1.1
• federation: 1.1.1
• files: 1.6.1
• files_external: 1.1.2
• files_pdfviewer: 1.0.1
• files_sharing: 1.1.1
• files_texteditor: 2.2
• files_trashbin: 1.1.0
• files_versions: 1.4.0
• files_videoplayer: 1.0.0
• firstrunwizard: 2.0
• gallery: 16.0.0
• logreader: 2.0.0
• lookup_server_connector: 1.0.0
• nextcloud_announcements: 1.0
• notes: 2.2.0
• notifications: 1.0.1
• password_policy: 1.1.0
• provisioning_api: 1.1.0
• serverinfo: 1.1.1
• sharebymail: 1.0.1
• survey_client: 0.1.5
• systemtags: 1.1.3
• tasks: 0.9.5
• theming: 1.1.1
• twofactor_backupcodes: 1.0.0
• updatenotification: 1.1.1
• workflowengine: 1.1.1
  Disabled:
• admin_audit
• encryption
• files_accesscontrol
• files_automatedtagging
• files_retention
• keeweb
• templateeditor
• user_external
• user_ldap
• user_saml

The content of config/config.php:

Config report

$CONFIG = array (
'instanceid' => 'xxx',
'passwordsalt' => 'xxx',
'secret' => 'xxx',
'trusted_domains' =>
array (
0 => 'xxx.',
),
'datadirectory' => '/var/www/html/ocldata/data',
'overwrite.cli.url' => 'https://xxx/cloud',
'dbtype' => 'mysql',
'version' => '11.0.2.7',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'oc_xxx',
'dbpassword' => 'xxx',
'logtimezone' => 'UTC',
'installed' => true,
'mail_smtpmode' => 'sendmail',
'mail_from_address' => 'user',
'mail_domain' => 'xxx',
'forcessl' => true,
'forceSSLforSubdomains' => true,
'memcache.local' => '\OC\Memcache\APCu',
'memcache.distributed' => '\OC\Memcache\Memcached',
'memcached_servers' =>
array (
0 =>
array (
0 => 'localhost',
1 => 11211,
),
),
'maintenance' => false,

Are you using external storage, if yes which one: local/smb/sftp/...
yes, smb
Are you using encryption: yes/no
no
Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
no

LDAP configuration (delete this part if not used)

LDAP config

With access to your command line run e.g.:
sudo -u www-data php occ ldap:show-config
from within your Nextcloud installation folder

Without access to your command line download the data/owncloud.db to your local
computer or access your SQL server remotely and run the select query:
SELECT * FROM `oc_appconfig` WHERE `appid` = 'user_ldap';


Eventually replace sensitive data as the name/IP-address of your LDAP server or groups.

Client configuration

Browser:
Windows WebDAV, Firefox, Internet Explorer
Operating system:
Windows 7

Logs

Web server error log

Web server error log

x.x.x.x - xxx [31/Mar/2017:16:09:47 +0200] "GET /cloud/remote.php/webdav/Dataxxx.mp3 HTTP/1.1" 503 1757 "-" "Mozilla/5.0 (Android) ownCloud-android/1.4.2"

"PROPFIND /cloud/remote.php/webdav/Data/desktop.ini HTTP/1.1" 503 1083 "-" "Microsoft-WebDAV-MiniRedir/6.1.7601"

Nextcloud log (data/nextcloud.log)

Nextcloud log

{"reqId":"yEicO3YpHAIRGHWPv0op","remoteAddr":"xxx","app":"webdav","message":"Exception: {\"Message\":\"HTTP\\\/1.1 503 Storage is temporarily not available\",\"Exception\":\"Sabre\\\\DAV\\\\Exception\\\\ServiceUnavailable\",\"Code\":0,\"Trace\":\"#0 \\\/var\\\/www\\\/html\\\/cloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/CorePlugin.php(81): OCA\\\\DAV\\\\Connector\\\\Sabre\\\\ObjectTree->getNodeForPath('Data\\\/medien\\\/pod...')\\n#1 [internal function]: Sabre\\\\DAV\\\\CorePlugin->httpGet(Object(Sabre\\\\HTTP\\\\Request), Object(Sabre\\\\HTTP\\\\Response))\\n#2 \\\/var\\\/www\\\/html\\\/cloud\\\/3rdparty\\\/sabre\\\/event\\\/lib\\\/EventEmitterTrait.php(105): call_user_func_array(Array, Array)\\n#3 \\\/var\\\/www\\\/html\\\/cloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Server.php(479): Sabre\\\\Event\\\\EventEmitter->emit('method:GET', Array)\\n#4 \\\/var\\\/www\\\/html\\\/cloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Server.php(254): Sabre\\\\DAV\\\\Server->invokeMethod(Object(Sabre\\\\HTTP\\\\Request), Object(Sabre\\\\HTTP\\\\Response))\\n#5 \\\/var\\\/www\\\/html\\\/cloud\\\/apps\\\/dav\\\/appinfo\\\/v1\\\/webdav.php(60): Sabre\\\\DAV\\\\Server->exec()\\n#6 \\\/var\\\/www\\\/html\\\/cloud\\\/remote.php(165): require_once('\\\/var\\\/www\\\/html\\\/c...')\\n#7 {main}\",\"File\":\"\\\/var\\\/www\\\/html\\\/cloud\\\/apps\\\/dav\\\/lib\\\/Connector\\\/Sabre\\\/ObjectTree.php\",\"Line\":162,\"User\":\"sync\"}","level":4,"time":"2017-03-31T14:09:47+00:00","method":"GET","url":"\/cloud\/remote.php\/webdav\/Data\xxx.mp3","user":"sync","version":"11.0.2.7"}

Browser log

Browser log

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log
c) ...

[LuCu11]

@ALL, is there anybody who can help me to solve this problem?

[ManOki]

Do you have preview/thumbnails enabled for that storage?

My setup contains big media files in separated directories stored at my NAS and added to nextcloud via samba/external storage. If i open such a directory with any nc client, the server tries to generate previews i.e. download all files within this directory from nas to server, which sometimes takes a while. During this time, the nc server is completly blocked for every client (and user) and producing 503 server error.

[skjnldsv]

Well, 503 error definitely means what it means, it cannot reach the smb server.
So this is not a nextcloud issue.