Crash in Windows 10

[dimalif]

Please provide the following information

qBittorrent version and Operating System

Windows 10/64bit Pro GR

What is the problem

Sudden freeze of Windows for 1-2 minutes and then it continues. The freeze happened twice, 1st time when starting Qbit and an other time while running. The event log below is when freezed while STARTING qbit.

Extra info(if any)

The error from Windows 10 events

Όνομα ελαττωματικής εφαρμογής: qbittorrent.exe, έκδοση 4.2.5.0, χρονική σήμανση: 0x5ea37cc6
Όνομα ελαττωματικής λειτουργικής μονάδας: qbittorrent.exe, έκδοση: 4.2.5.0, χρονική σήμανση: 0x5ea37cc6
Κωδικός εξαίρεσης: 0xc0000005
Μετατόπιση σφάλματος: 0x00000000002bbee7
Αναγνωριστικό ελαττωματικής διεργασίας: 0x1f68
Χρόνος έναρξης ελαττωματικής εφαρμογής: 0x01d63ac91fb14c74
Διαδρομή ελαττωματικής εφαρμογής: C:\Program Files\qBittorrent\qbittorrent.exe
Διαδρομή ελαττωματικής λειτουργικής μονάδας:C:\Program Files\qBittorrent\qbittorrent.exe

[treysis]

Does this also happen on an English Windows system?

[dimalif]

@treysis

How should i know that?

[treysis]

Setting ur system to English?

[FranciscoPombal]

Please provide version info.

[dimalif]

@FranciscoPombal

The version is shown in the log posted above among other info, it is 4.2.5.0, as for Windows the latest updated W10 Pro 64.

[treysis]

We need at least a crash dump.

For this, you need to tell Windows to create crash dumps in the first place:
https://helgeklein.com/blog/2018/10/creating-an-application-crash-dump/

[dimalif]

@treysis I'm sorry but i'm not going to do all that you ask. They are beyond my capabilities and also a bit on the risk side for my working pc.

[xavier2k6]

@dimalif Would you at least be willing to attach a debugger with pre-defined rules?

This will hopefully provide a usable stacktrace to point in the direction of the issue.

[dimalif]

@xavier2k6 Sure, if you tell me how.

[n-r-w]

Persistent crashes when downloading at high speed (25Mb/s). Crash dump: https://yadi.sk/d/_J8cEkIhkiBkrg

[treysis]

Oh yes, I noticed something maybe related/similar. While I was testing something, I was running two bittorrent clients on my PC. So qBittorrent would download from the other. Being on the same machine, that resulted in high speeds. But qBittorrent would soon become irresponsive and needed to be forced closed. I could only see that speeds at the moment before freezing were around 32 MB/sec.

[xavier2k6]

@n-r-w

Persistent crashes when downloading at high speed (25Mb/s). Crash dump: https://yadi.sk/d/_J8cEkIhkiBkrg

I've looked at the crash dump, there's not much info to go on except that you received an exception 0xc0000409 on thread 0 Can you please post in #12064 & I will get you to attach a debugger.

[xavier2k6]

@dimalif

Please download & install Debug Diagnostic Tool v2 Update 3

Download & extract these predefined rules
qBittorrent DebugDiag Rules_26.03.2020_Full PageHeap Enabled.zip to your desktop or where you would like to.

Run DebugDiag 2 Collection from your start menu.
On the bottom right of the main window, you will find an Import button.
Click the Import button & point it to where you extracted the rules above.
The debugger rules should show active & as soon as there's a crash - it will capture a "stacktrace"

This will hopefully help point us in the right direction to where there's a problem in the program.

Your memory usage will probably increase more so than normal & the program itself may become unresponsive for a period of time due to having a debugger attached.

As soon as a stacktrace is created, it will be ok to deactivate the rules & close/detach the debugger from qBittorrent

[dimalif]

@xavier2k6 I will do that and hope (and wait) until those happen again, because it is random.

[FranciscoPombal]

Most likely faulty drivers or hardware or some other issue. I routinely download at 50-100 MiB/s (500 Mbps - 1 Gbps) on multiple systems running both Linux and Windows, and running hardware as far back as 2008 without issues.

[skidaddl3]

qBittorrent version 4.2.5 crashes after an overnight run of it when I right click anywhere. It keeps running if I don't disturb it's delicate ingenuity, running in the background.
It is running on Windows Server 2012 R2 that is... AND the OS is on a VM in Unraid (kvm) which uses Linux Redhat virtual i/o drivers...?

[xavier2k6]

@skidaddl3 you are experiencing a different crash to this issue, OP is getting exception code: c0000005 & you are getting exception code: c0000409 - Can you test your memory & also no corruption of your OS files via sfc command?

If issue persists, please open a new issue with Crash Exception code: 0xc0000409 in the title.

[skidaddl3]

@xavier2k6 I am running the SFC test now.
EDIT: No integrity violations, DISM also found no problems
I have a feeling it is to do with Unraid's shared folder design, as I am using a Cache SDD drive and it is technically full. I am getting a lot of "...not enough space on the disk" file error alerts in QB log, however I have set the Unraid shared folder for Qbittorrent's "working directory" as 'Prefer'. The problem is a 2TB Cache SSD seems not to be enough and I also set Qbittorrent to "Pre-allocate disk space for all files" to avoid a different kind of congestion.

I have reduced the "Outstanding memory when checking torrents" from 1024MiB to 64MiB

[xavier2k6]

@FranciscoPombal this can probably be closed now as there's been no update in relation to stacktrace & OP is running 4.3.1 now, ref: #13992

@dimalif did you experience this again at any stage/manage to grab a stack trace??

[dimalif]

@xavier2k6 Nope, the issue is gone.

[FranciscoPombal]

Closing Locking as no longer relevant