[Qt4] "unknown errors" when changing bandwidth limit

[cortopy]

Expected behaviour

When changing bandwidth limit in settings I would expect bandwith to be indeed limited. I'm not sure what "limit automatically" means, but changing bandwith to something fixed doesn't work either

Actual behaviour

Sync doesn't work at all. At the moment I'm uploading a large number of files and about 99% of files give "unknown error" and sync never happen

Steps to reproduce

1. Change limit bandwidth settings to either automatic or a set amount

Server configuration

Operating system: Ubuntu 14.10

Web server: nginx

Database: mySQL

PHP version: 5..5.12

ownCloud version: 8.0.2

Storage backend: ?

Client configuration

Client version: 1.8

Operating system: Ubuntu 14.10

OS language: English

Installation path of client: as per app-get

[guruz]

Can you run your client with parameter --logfile - and paste here some context on what causes the first errors?

[ogoffart]

What is your Qt version?

EDIT: You can see it in the Settings window in "General"

[cortopy]

Logs are very big and I'm not sure which bit is helpful.

As examples:

03-25 13:43:43:523 0x1d74590 (+) Watcher: "/home/user/Pictures/Icons/material/maps" 
03-25 13:43:43:539 0x1d74590     `-> discarded: "/home/user/Pictures/Icons/material/maps/1x_ios" 
03-25 13:43:43:539 0x1d74590     `-> discarded: "/home/user/Pictures/Icons/material/maps/1x_web" 

It's like that for all files skipped and giving "unknown errors" in the client UI

Then, in the log there is also a long error String which begins like this:

03-25 13:43:43:703 0x1d74590 Processing result list and logging took  1268  Milliseconds. 
03-25 13:43:43:703 0x1d74590 OO folder slotSyncFinished: result:  9 
03-25 13:43:43:741 0x1d74590   ** error Strings:  ("Graphic Design/Textures, Shadows and Backgrounds/webtreats-seamles-paper-patterns.zip: Unknown error.", "Icons/Font-Awesome/black/png/128/arrow-circle-o-up.png: Unknown error.", "Icons/Font-Awesome/black/png/128/arrow-circle-right.png: Unknown error.", "Icons/Font-Awesome/black/png/128/arrow-circle-up.png: Unknown error.",

[cortopy]

Qt version is 4.8.6

[guruz]

If you use >= Qt 5.4 then the new bandwidth code will be used. Could you try that?

Related #2558

[cortopy]

How could I try that? I'm using

deb http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/xUbuntu_14.10/

and there isn't an updated version for the client.

[cortopy]

Should I report this in the related issue too?

[guruz]

@jnweiger Is there qt5-based packages already?

How could I try that?

In worst case you need to compile it yourself :-)

[cortopy]

That's a shame. I thought that by using package manager I wouldn't miss on updates. Does this mean the client doesn't get updated regularly for Linux packages? If this is the case, then I'd switch to compiling, but I want to be sure first

[guruz]

@cortopy The problem is that right now we maintain Qt4 and Qt5 compiles.
In this particular case there are bugfixes inside Qt5 itself and we switch to a new codepath based on the Qt version..

client/src/libsync/owncloudpropagator.cpp

Line 372 in fba9020

// QNAM bandwith limiting only work with version of Qt greater or equal to 5.3.3

FYI @dragotin @jnweiger