Sync Failure due to Precondition Failed #18515

kalletabur · 2015-08-24T10:42:08Z

Similar issues seems to have reported before Sync Failure due to Precondition Failed and precondition failed (412) from the server but these are closed now and we have newer clients.

Steps to reproduce

User1 created document and shared with user2.
Document user2 modified is still old in user1 sync folder on computer.
In web browser, its showing the modifications user2 made. Owncloud client insists that everything is up to date.
Then user1 made some modifications on the file in his computer and then initiated sync

Expected behaviour

Owncloud should be able to resolve the conflict.

Actual behaviour

Error file is created, precondition error is replied

6.05.2015 11:42User1/Exainf.docx ownCloud Downloaded, renamed conflicting file7.9 KiB
6.05.2015 11:42User1/Exainf.docx ownCloud Error downloading https://owncloud.example.com/remote.php/webdav/User1/Exainf.docx - server replied: Precondition failed (An If-Match header was specified, but none of the specified the ETags matched.)12 KiB

Server configuration

Operating system:
Debian 7.8

Web server:
NGINX 1.2.1-2.2+wheezy3

Database:
MySQL 5.5.44-0+deb7u1

PHP version:
PHP 5.4.41-0+deb7u1

ownCloud version: (see ownCloud admin page)
8.0.2-8

Updated from an older ownCloud or fresh install:
updated

List of activated apps:

Enabled:
 - activity
 - files
 - files_encryption
 - files_locking
 - files_pdfviewer
 - files_sharing
 - files_texteditor
 - files_trashbin
 - files_versions
 - files_videoviewer
 - firstrunwizard
 - gallery
 - user_ldap
Disabled:
 - external
 - files_external
 - provisioning_api
 - templateeditor
 - user_external
 - user_webdavauth

The content of config/config.php:

<?php
$CONFIG = array (
  'instanceid' => '8a7s6df87as76',
  'passwordsalt' => '*** removed for security reasons',
  'trusted_domains' => 
  array (
    0 => 'oc.oc.oc',
  ),
  'datadirectory' => '/var/ocdatafolder/',
  'dbtype' => 'mysql',
  'version' => '8.0.2.0',
  'dbname' => 'ocmysqldatabase',
  'dbhost' => 'ocmysqldatabasehost',
  'dbtableprefix' => 'oc_dbtableprefix',
  'dbuser' => 'dbuser',
  'dbpassword' => '*** removed for security reasons',
  'installed' => true,
  'ldapIgnoreNamingRules' => false,
  'loglevel' => '0',
  'mail_smtpmode' => 'smtp',
  'mail_smtphost' => 'smtp.oc.oc',
  'mail_smtpport' => '25',
  'forcessl' => true,
  'maintenance' => false,
  'logtimezone' => 'Europe/Europe',
  'theme' => '',
  'share_folder' => '/Shared',
  'preview_libreoffice_path' => 'libreoffice',
  'secret' => '*** removed for security reasons',
);

Are you using external storage, if yes which one: local/smb/sftp/...
no

Are you using encryption: yes/no
yes

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
ActiveDirectory

LDAP configuration (delete this part if not used)

|appid|configkey|configvalue|
|user_ldap|cleanUpJobOffset|600|
|user_ldap|enabled|yes|
|user_ldap|has_memberof_filter_support|1|
|user_ldap|home_folder_naming_rule||
|user_ldap|installed_version|0.5.0|
|user_ldap|last_jpegPhoto_lookup|0|
|user_ldap|ldap_agent_password||
|user_ldap|ldap_attributes_for_group_search||
|user_ldap|ldap_attributes_for_user_search||
|user_ldap|ldap_backup_host||
|user_ldap|ldap_backup_port||
|user_ldap|ldap_base|DC=example,DC=local|
|user_ldap|ldap_base_groups|DC=example,DC=local|
|user_ldap|ldap_base_users|DC=example,DC=local|
|user_ldap|ldap_cache_ttl|600|
|user_ldap|ldap_configuration_active|1|
|user_ldap|ldap_display_name|displayname|
|user_ldap|ldap_dn|CN=Comp-Ownc,OU=COM,OU=Company,DC=example,DC=local|
|user_ldap|ldap_email_attr|mail|
|user_ldap|ldap_experienced_admin|0|
|user_ldap|ldap_expert_username_attr|sAMAccountName|
|user_ldap|ldap_expert_uuid_group_attr||
|user_ldap|ldap_expert_uuid_user_attr||
|user_ldap|ldap_group_display_name|cn|
|user_ldap|ldap_group_filter|(&(|(objectclass=group))(|(cn=Dev)(CN=Comp-Ownc)(cn=Comp-admis)))|
|user_ldap|ldap_group_filter_mode|0|
|user_ldap|ldap_group_member_assoc_attribute|member|
|user_ldap|ldap_groupfilter_groups|Comp-DevComp-Owncloud Comp-admis|
|user_ldap|ldap_groupfilter_objectclass|group|
|user_ldap|ldap_host|dc300|
|user_ldap|ldap_login_filter|(&(&(|(objectclass=person))(|(memberof=CN=Comp-Ownc,OU=DL,OU=Company,DC=example,DC=local)(memberof=CN=Comp-Dev,OU=DL,OU=Company,DC=example,DC=local)(memberof=CN=Comp-admis,OU=DL,OU=Company,DC=example,DC=local)))(samaccountname=%uid))|
|user_ldap|ldap_login_filter_mode|0|
|user_ldap|ldap_loginfilter_attributes||
|user_ldap|ldap_loginfilter_email|0|
|user_ldap|ldap_loginfilter_username|1|
|user_ldap|ldap_nested_groups|0|
|user_ldap|ldap_nocase|1|
|user_ldap|ldap_override_main_server|0|
|user_ldap|ldap_paging_size|500|
|user_ldap|ldap_port|389|
|user_ldap|ldap_quota_attr||
|user_ldap|ldap_quota_def||
|user_ldap|ldap_tls|0|
|user_ldap|ldap_turn_off_cert_check|1|
|user_ldap|ldap_user_filter_mode|1|
|user_ldap|ldap_userfilter_groups||
|user_ldap|ldap_userfilter_objectclass||
|user_ldap|ldap_userlist_filter|(&(|(objectclass=person))(|(memberof=CN=Comp-Ownc,OU=DL,OU=Company,DC=example,DC=local)(memberof=CN=Comp-Dev,OU=DL,OU=Company,DC=example,DC=local)(memberof=CN=Comp-SystemAdministrators,OU=DL,OU=Company,DC=example,DC=local)))|
|user_ldap|ocsid|166061|
|user_ldap|types|authentication|

Client configuration

Browser:
FireFox

Operating system:
Windows 8.1

OwnCloud Client
1.8.4

Logs

ownCloud log (data/owncloud.log)

``{"reqId":"a8s7df98as9df87a9s8","remoteAddr":"10.10.10.10","app":"webdav","message":"Exception: {\"Message\":\"An If-Match header was specified, but none of the specified the ETags matched.\",\"Code\":0,\"Trace\":\"
#0 \\\/var\\\/www\\\/owncloud\\\/lib\\\/private\\\/connector\\\/sabre\\\/server.php(70): Sabre\\\\DAV\\\\Server->checkPreconditions(false)\\n
#1 \\\/var\\\/www\\\/owncloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/Sabre\\\/DAV\\\/Server.php(878): OC_Connector_Sabre_Server->checkPreconditions()\\n
#2 [internal function]: Sabre\\\\DAV\\\\Server->httpPut('User1\\\/Ex ...')\\n
#3 \\\/var\\\/www\\\/owncloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/Sabre\\\/DAV\\\/Server.php(474): call_user_func(Array, 'User1\\\/Ex ...')\\n
#4 \\\/var\\\/www\\\/owncloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/Sabre\\\/DAV\\\/Server.php(214): Sabre\\\\DAV\\\\Server->invokeMethod('PUT', 'User1\\\/Ex ...')\\n
#5 \\\/var\\\/www\\\/owncloud\\\/apps\\\/files\\\/appinfo\\\/remote.php(61): Sabre\\\\DAV\\\\Server->exec()\\n
#6 \\\/var\\\/www\\\/owncloud\\\/remote.php(54): require_once('\\\/var\\\/www\\\/ownclo...')\\n
#7 {main}\",\"File\":\"\\\/var\\\/www\\\/owncloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/Sabre\\\/DAV\\\/Server.php\",\"Line\":1962}","level":0,"time":"2015-05-06T11:42:38+03:00","method":"PUT","url":"\/remote.php\/webdav\/User1\/Exainf.docx"}

The text was updated successfully, but these errors were encountered:

PVince81 · 2015-08-25T16:20:02Z

The conflict situation is normal. If the client of user1 did not download the latest version, and at this time user1 makes changes to the document, it is technically a conflict.

The issue here is rather the question why the client of user1 did not download in the first place.
I suspect that it could be an etag propagation issue

PVince81 · 2015-08-25T16:22:21Z

Etag propagation has been reworked and improved in 8.1.1 (see #14726). You could also try 8.0.6 but I'm not sure if it will improve there.

PVince81 · 2015-08-25T16:23:31Z

If you can provide more details about the path names of the shared files, from the point of view of user1 and from the point of view of user2, I might be able to tell you if this is the situation where this bug happens.

kalletabur · 2015-08-26T13:55:52Z

Is this view suitable?

/ownclouddatadirectory/user2/files_encryption/keys/Shared/Exainf.docx
/ownclouddatadirectory/user2/files_encryption/keys/Shared/Exainf.docx/fileKey
/ownclouddatadirectory/user2/files_encryption/keys/Shared/Exainf.docx/user2.shareKey

/ownclouddatadirectory/user1/user1datafolder/keyfiles/User1/Exainf.docx.key

/ownclouddatadirectory/user1/user1datafolder/share-keys/User1/Exainf.docx.recovery_83kjh34c.shareKey
/ownclouddatadirectory/user1/user1datafolder/share-keys/User1/Exainf.docx.user1.shareKey

/ownclouddatadirectory/user1/files_encryption/keys/User1/Exainf.docx
/ownclouddatadirectory/user1/files_encryption/keys/User1/Exainf.docx/fileKey
/ownclouddatadirectory/user1/files_encryption/keys/User1/Exainf.docx/user2.shareKey
/ownclouddatadirectory/user1/files_encryption/keys/User1/Exainf.docx/recovery_83kjh34c.shareKey
/ownclouddatadirectory/user1/files_encryption/keys/User1/Exainf.docx/user1.shareKey

/ownclouddatadirectory/user1/files/User1/Exainf.docx

/ownclouddatadirectory/user1/files_versions/User1/Exainf.docx.v1418641549
/ownclouddatadirectory/user1/files_versions/User1/Exainf.docx.v1418642796
/ownclouddatadirectory/user1/files_versions/User1/Exainf.docx.v1419248125

kalletabur · 2015-09-04T07:01:08Z

@PVince81 Any updates on this?

kalletabur · 2015-09-15T09:09:17Z

If @PVince81 cannot help on this maybe someone else has ideas?

PVince81 · 2015-09-15T09:18:01Z

I think this is fixed in 8.1.3, you might want to retest with that version.

There isn't much to be done for older versions as the improved etag propagation code cannot be backported. If you still see this issue in 8.1.3 with the same sharing configuration then it might be a different issue.

PVince81 · 2016-04-29T14:40:30Z

Please let me know if you still have this issue in 8.2.3 or 9.0.1.

lock · 2019-08-02T14:01:14Z

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

PVince81 added the Type:Bug label Aug 25, 2015

PVince81 added the feature:sharing label Aug 25, 2015

PVince81 closed this as completed Apr 29, 2016

lock bot locked as resolved and limited conversation to collaborators Aug 2, 2019

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Sync Failure due to Precondition Failed #18515

Sync Failure due to Precondition Failed #18515

kalletabur commented Aug 24, 2015 •

edited by peterprochaska

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PVince81 commented Aug 25, 2015

PVince81 commented Aug 25, 2015

PVince81 commented Aug 25, 2015

kalletabur commented Aug 26, 2015

kalletabur commented Sep 4, 2015

kalletabur commented Sep 15, 2015

PVince81 commented Sep 15, 2015

PVince81 commented Apr 29, 2016

lock bot commented Aug 2, 2019

Sync Failure due to Precondition Failed #18515

Sync Failure due to Precondition Failed #18515

Comments

kalletabur commented Aug 24, 2015 • edited by peterprochaska Loading

Steps to reproduce

Expected behaviour

Actual behaviour

Server configuration

LDAP configuration (delete this part if not used)

Client configuration

Logs

ownCloud log (data/owncloud.log)

PVince81 commented Aug 25, 2015

PVince81 commented Aug 25, 2015

PVince81 commented Aug 25, 2015

kalletabur commented Aug 26, 2015

kalletabur commented Sep 4, 2015

kalletabur commented Sep 15, 2015

PVince81 commented Sep 15, 2015

PVince81 commented Apr 29, 2016

lock bot commented Aug 2, 2019

kalletabur commented Aug 24, 2015 •

edited by peterprochaska

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