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The Basics
- Nextcloud Server version (e.g., 29.x.x):
- Nextcloud Hub 25 Autumn (32.0.4)
- Operating system and version (e.g., Ubuntu 24.04):
Debian 13
- Web server and version (e.g, Apache 2.4.25):
2.4.66
- Reverse proxy and version _(e.g. nginx 1.27.2)
nginx 1.28.1
- PHP version (e.g, 8.3):
8.3.29
- Is this the first time you’ve seen this error? (Yes / No):
yes
- When did this problem seem to first start?
since beginning
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
AIO
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
no
Summary of the issue you are facing:
I have pretty much basic Nextcloud AIO.
Sometimes files (pictures) are failing to synchronize with “Unknown error”.
Long digging got me to log entry like:
“Expected filesize of 4486810 bytes but read(from Nextcloud client) and wrote(to Nextcloud storage) 2482176 bytes.Could either be a network problem on
the sending side or a problem writing to the storage on the server side.”
which is all similar to:
or:
Both tickets closed - no real conclusion.
There is a suggestion that it might be Apache mod_reqtimeout.
The thing is that changing this in AIO seems to be quite a hiccup.
I mean I can force it but …. maybe there is a better way overall why should it just reported by sync process as conflict and let end user solve it ?
Steps to replicate it (hint: details matter!):
There are no reliable ways for me to replicate this, mostly:
-
Take a photo , the more the better
-
Check sync status
I have mesh wi-fi, there is a chance that changing from one to another mesh node is somehow involved.
For me personally it happened ~20 times during sync of 20GB of pictures.
For my wife , 1/3 of her ~10k pictures has this issue.
Log entries
Nextcloud
Getting this in AIO is tricky but I guess this is it
{
"reqId": "FwKGgEYNPztBgMqyTWgo",
"level": 3,
"time": "2026-02-10T06:23:28+00:00",
"remoteAddr": "10.9.0.1",
"user": "*****",
"app": "no app in context",
"method": "PUT",
"url": "/remote.php/dav/files/*****/InstantUpload/Camera/PXL_20260210_062213496.MP.jpg",
"scriptName": "/remote.php",
"message": "Expected filesize of 4486810 bytes b
ut read(from Nextcloud client) and wrote(to Nextcloud storage) 2482176 bytes.Could either be a network problem on the sending side or a problem writing to the storage on the server side.
","
userAgent ":"
Mozilla / 5.0(Android) Nextcloud - android / 3.35 .2 ","
version ":"
32.0 .4 .1 ","
exception ":{"
Exception ":"
Sabre\\ DAV\\ Excep
tion\\ BadRequest ","
Message ":"
Expected filesize of 4486810 bytes but read(from Nextcloud client) and wrote(to Nextcloud storage) 2482176 bytes.Could either be a network problem on the sending side or a problem writing to the storage on the server side.
","
Code ":0,"
Trace ":[{"
file ":" /
var / www / html / apps / dav / lib / Connec
tor / Sabre / Directory.php ","
line ":119,"
function ":"
put ","
class ":"
OCA\\ DAV\\ Connector\\ Sabre\\ File ","
type ":" - > ","
args ":[" ** * sensitive parameters replaced ** * "]},{"
file ":" /
var / www / html / 3 rdparty / sabre / dav / lib / DAV / Server.php ","
line ":1098,"
function ":"
createFile ","
class ":"
OCA\\ DAV\\ Connector\\ Sabre\\ Directory ","
type ":" - > ",
"args": ["*** sensitive parameters replaced ***"]
}, {
"file": "/var/www/html/3rdparty/sabre/dav/lib/DAV/CorePlugin.php",
"line": 504,
"function": "createFile",
"class": "Sabre\\DAV\\Server",
"type": "->",
"args": ["*** sensitive parameters replaced ***"]
}, {
"file": "/var/www/html/3rdparty/sabre/event/lib/WildcardEmitterTrait.php",
"line": 89,
"function": "httpPut",
"class": "Sabre\\DAV\\CorePlugin",
"type": "->",
"args": [{
"__class__": "Sabre\\HTTP\\Request"
}, {
"__class__": "Sabre\\HTTP\\Response"
}]
}, {
"file": "/var/www/html/3rdparty/sabre/dav/lib/DAV/Server.php",
"line": 472,
"function": "emit",
"class": "Sabre\\DAV\\Server",
"type": "->",
"args": ["method:PUT", [{
"__class__": "Sabre\\HTTP\\Request"
}, {
"__class__": "Sabre\\HTTP\\Response"
}]]
}, {
"file": "/var/www/html/apps/dav/lib/Connector/Sabre/Server.php",
"line": 211,
"function": "invokeMethod",
"class": "Sabre\\DAV\\Server",
"type": "->",
"args": [{
"__class__": "Sabre\\HTTP\\Request"
}, {
"__class__": "Sabre\\HTTP\\Response"
}]
}, {
"file": "/va
r / www / html / apps / dav / lib / Server.php ","
line ":424,"
function ":"
start ","
class ":"
OCA\\ DAV\\ Connector\\ Sabre\\ Server ","
type ":" - > ","
args ":[]},{"
file ":" /
var / www / html / apps / dav / appinfo / v2 / remote.php ","
line ":22,"
function ":"
exec ","
class ":"
OCA\\ DAV\\ Server ","
type ":" - > ","
args ":[]},{"
file ":" /
var / www / html / remote.php ","
line ":151,"
ar
gs ":[" /
var / www / html / apps / dav / appinfo / v2 / remote.php "],"
function ":"
require_once "}],"
File ":" /
var / www / html / apps / dav / lib / Connector / Sabre / File.php ","
Line ":260,"
message ":"
Expected filesize of 4486810 bytes but read(from Nextcloud client) and wrote(to Nextcloud storage) 2482176 bytes.Could either be a network problem on
the sending side or a problem writing to the storage on the server side.
","
exception ":{},"
CustomMessage ":"
Expected filesize of 4486810 bytes but read(from Nextcloud client) and wrote(to Nextcloud storage) 2482176 bytes.Could either be a network problem on the sending side or a problem writing to the storage on
the server side.
"}}
Web Browser
N/A
Web server / Reverse Proxy
N/A - Nextcloud AIO apache config is at WARN level - no log entries whatsoever.
Configuration
Nextcloud
{
"system": {
"one-click-instance": true,
"one-click-instance.user-limit": 100,
"memcache.local": "\\OC\\Memcache\\APCu",
"apps_paths": [
{
"path": "\/var\/www\/html\/apps",
"url": "\/apps",
"writable": false
},
{
"path": "\/var\/www\/html\/custom_apps",
"url": "\/custom_apps",
"writable": true
}
],
"check_data_directory_permissions": false,
"memcache.distributed": "\\OC\\Memcache\\Redis",
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"password": "***REMOVED SENSITIVE VALUE***",
"port": 6379
},
"overwritehost": "***REMOVED SENSITIVE VALUE***",
"overwriteprotocol": "https",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"localhost",
"nas.szus.ovh"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "pgsql",
"version": "32.0.4.1",
"overwrite.cli.url": "https:\/\/***REMOVED SENSITIVE VALUE***\/",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbtableprefix": "oc_",
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"instanceid": "***REMOVED SENSITIVE VALUE***",
"maintenance": false,
"updatechecker": false,
"loglevel": 2,
"log_type": "file",
"logfile": "\/var\/www\/html\/data\/nextcloud.log",
"log_rotate_size": 10485760,
"log.condition": {
"apps": [
"admin_audit"
]
},
"preview_max_x": 2048,
"preview_max_y": 2048,
"jpeg_quality": 60,
"enabledPreviewProviders": {
"1": "OC\\Preview\\Image",
"2": "OC\\Preview\\MarkDown",
"3": "OC\\Preview\\MP3",
"4": "OC\\Preview\\TXT",
"5": "OC\\Preview\\OpenDocument",
"6": "OC\\Preview\\Movie",
"7": "OC\\Preview\\Krita",
"0": "OC\\Preview\\Imaginary",
"23": "OC\\Preview\\ImaginaryPDF"
},
"enable_previews": true,
"upgrade.disable-web": true,
"mail_smtpmode": "smtp",
"trashbin_retention_obligation": "auto, 30",
"versions_retention_obligation": "auto, 30",
"activity_expire_days": 30,
"simpleSignUpLink.shown": false,
"share_folder": "\/Shared",
"one-click-instance.link": "https:\/\/nextcloud.com\/all-in-one\/",
"upgrade.cli-upgrade-link": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/2726",
"updatedirectory": "\/nc-updater",
"maintenance_window_start": 100,
"allow_local_remote_servers": true,
"davstorage.request_timeout": 3600,
"documentation_url.server_logs": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/5425",
"htaccess.RewriteBase": "\/",
"dbpersistent": false,
"auth.bruteforce.protection.enabled": true,
"ratelimit.protection.enabled": true,
"files_external_allow_create_new_local": false,
"trusted_proxies": "***REMOVED SENSITIVE VALUE***",
"preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
"preview_imaginary_key": "***REMOVED SENSITIVE VALUE***",
"mail_smtpsecure": "ssl",
"mail_sendmailmode": "smtp",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "465",
"mail_smtpauth": true,
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"mail_stmptimeout": 30,
"config_preset": 2,
"app_install_overwrite": [],
"memories.db.triggers.fcu": true,
"memories.exiftool": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/exiftool-amd64-musl",
"memories.vod.path": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/go-vod-amd64",
"memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
"memories.vod.ffprobe": "\/usr\/bin\/ffprobe",
"DOMAIN": "***REMOVED SENSITIVE VALUE***"
}
}
Apps
Enabled:
- activity: 5.0.0-dev.0
- admin_audit: 1.22.0
- bruteforcesettings: 5.0.0-dev.0
- calendar: 6.1.5
- circles: 32.0.0
- cloud_federation_api: 1.16.0
- comments: 1.22.0
- contacts: 8.3.0
- contactsinteraction: 1.13.1
- dashboard: 7.12.0
- dav: 1.34.2
- deck: 1.16.3
- drawio: 3.1.2
- federatedfilesharing: 1.22.0
- federation: 1.22.0
- files: 2.4.0
- files_confidential: 4.0.0
- files_downloadlimit: 5.0.0-dev.0
- files_pdfviewer: 5.0.0-dev.0
- files_reminders: 1.5.0
- files_sharing: 1.24.1
- files_trashbin: 1.22.0
- files_versions: 1.25.0
- firstrunwizard: 5.0.0-dev.0
- guests: 4.6.0
- logreader: 5.0.0-dev.0
- lookup_server_connector: 1.20.0
- memories: 7.8.1
- nextcloud-aio: 0.8.0
- nextcloud_announcements: 4.0.0-dev.0
- notes: 4.12.4
- notifications: 5.0.0-dev.0
- notify_push: 1.3.0
- oauth2: 1.20.0
- password_policy: 4.0.0-dev.0
- photos: 5.0.0-dev.1
- privacy: 4.0.0-dev.0
- profile: 1.1.0
- provisioning_api: 1.22.0
- recommendations: 5.0.0-dev.0
- related_resources: 3.0.0-dev.0
- richdocuments: 9.0.2
- serverinfo: 4.0.0-dev.0
- settings: 1.15.1
- sharebymail: 1.22.0
- spreed: 22.0.8
- support: 4.0.0-dev.0
- survey_client: 4.0.0-dev.0
- systemtags: 1.22.0
- tasks: 0.17.1
- text: 6.0.1
- theming: 2.7.0
- twofactor_backupcodes: 1.21.0
- twofactor_nextcloud_notification: 6.0.0-dev.0
- twofactor_totp: 14.0.0
- updatenotification: 1.22.0
- user_status: 1.12.0
- viewer: 5.0.0-dev.0
- weather_status: 1.12.0
- webhook_listeners: 1.3.0
- whiteboard: 1.5.3
- workflowengine: 2.14.0
Disabled:
- app_api: 32.0.0 (installed 32.0.0)
- encryption: 2.20.0
- files_external: 1.24.0
- suspicious_login: 10.0.0-dev.0
- user_ldap: 1.23.0