Random deadlock during batch processing

[nicogodet]

What is the bug or the crash?

Since few QGIS updates, I randomly encounter a deadlock during a batch processing of hundreds of file.
No crash, no nothing

Processing just stops during algorithm initialization, I'm unable to cancel.

In above image, there is a deadlock and it will be stuck at this step forever.

Windows process manager shows 0 activity

Steps to reproduce the issue

Use a simple alg on lightweight files (like warp)

1. Open Warp
2. Switch to batch processing
3. Load lot of files (100 or 200 at least)
4. Define output files (in my case file_path(file_path( @INPUT )) || '\\temp\\' || file_name( @INPUT ) )
5. start processing

Random part...

6. see deadlock

Versions

3.32.1 / Master on Win10

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

@haubourg can confirm too

Of course I can provide files to reproduce but I think that it can be easily reproduced.

For sure it didn't happen with 3.10 or 3.16 as I remember processing hundreds of file like I do now without issues.

May be linked to #47769 ? gentle ping @nyalldawson

[roya0045]

Duplicate of #53806

[nicogodet]

Oh yeah
Was on holidays when it was posted, I missed it.

[roya0045]

Happens, don't worry. I hope the holidays were good.