424142 - Download manager shows negative download speed values

Status: UNCONFIRMED

(Toolkit :: Downloads API, defect)

Description

[Lorenz H.-S.]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; de; rv:1.9b4) Gecko/2008030714 Firefox/3.0b4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; de; rv:1.9b4) Gecko/2008030714 Firefox/3.0b4

As I am currently using a dial-up connection for browsing the internet, I recently found out that under some circumstances - which I cannot specify further - the download manager of Firefox 3 Beta 4 schows negative values for the download speed

Reproducible: Sometimes

Steps to Reproduce:
1. Use a dial-up connection
2. Download some file
3. Look at the download speed shown
Actual Results:  
Download is stuck

Expected Results:  
A file finished downloading - what else^^?

I can provide a screenshot (German version of Firefox, hope it doesn't matter) at http://loadpic.de/9D8HIEU6I.jpg

Comment 1

[Lorenz H.-S.]

Attachment: Screenshot of the bug

Comment 2

[Shawn Wilsher :sdwilsh]

Edward - thoughts on how this could happen?

Comment 5

[Justin Lebar (not reading bugmail)]

I saw this today when saving a webpage with many large images.

I was running a debug build on a Windows 7 VM.  Maybe this happens on slow computers / with slow builds?

I also got an assertion to the tune of "no bytes consumed after ondataavailable call".

changeset bb0699c9743a, Windows 7 x86-32, debug build.

Comment 6

[Justin Lebar (not reading bugmail)]

For me the speed was -452899 bytes/sec, which is close to -1 * my actual download speed.

Comment 7

[John David Galt]

Happens to me regularly when saving a web page, and I'm using broadband.

Comment 8

[Shriram (irc: Mavericks)]

On Wi-fi, 
download speeds were at a maximum of 18-25 KB/sec 
and around -3000 to -5000 bytes/sec towards the end of the download.
FF 19.0.2 release

Comment 9

[Franpa_999]

I have this issue when downloading the 720p copy of this video from Youtube http://www.youtube.com/watch?feature=player_embedded&v=opqO9PAzyzM

The total download size can not be determined and in the title bar of the download manager as well as on the taskbar for it it will display the % complete prefixed with a minus sign.

Don't ask me why it's showing a percentage completed when it can't determine the total download size, I don't have the answer to that.

Comment 10

[Franpa_999]

(In reply to Franpa_999 from comment #9)
> I have this issue when downloading the 720p copy of this video from Youtube
> http://www.youtube.com/watch?feature=player_embedded&v=opqO9PAzyzM
> 
> The total download size can not be determined and in the title bar of the
> download manager as well as on the taskbar for it it will display the %
> complete prefixed with a minus sign.
> 
> Don't ask me why it's showing a percentage completed when it can't determine
> the total download size, I don't have the answer to that.

It's currently at -207% complete

Comment 11

[Franpa_999]

Image of the problem: http://i63.photobucket.com/albums/h133/franpa/Untitled_zps0c72d3ce.png~original

Comment 12

[Franpa_999]

God dammit, I checked the bug reporter's attachment and realize my problem is different to his :/

Sorry :/

Comment 13

[Lorenz H.-S.]

Also, this bug is six years old now. Do people still experience it? (I'm not a Firefox user any more)

Comment 14

[Shriram (irc: Mavericks)]

This error hasn't reoccurred to me since FF 20+ release

Comment 15

[Matthias Versen [:Matti]]

Please add a comment if anyone still saw this error since Firefox20

Comment 16

[John David Galt]

I've seen it once in FF 32.0.1, but I'd have a hard time reproducing it.

Comment 17

[Matthias Versen [:Matti]]

This can only be fixed if we find a way to reproduce it ...