ID 542766 - Nuke Studio hangs and sometimes crashes when loading many .mov DnxHD files at the same time during a Sync Review session

Problem summary
Nuke Studio hangs and sometimes crashes when loading many DnxHD files at the same time during a Sync Review session
 
This only appears to happen with DNxHD .mov files, other codecs like H264 and Prores are unaffected. Other file formats, like .dpx and .exr, as also unaffected
 
This can result in errors in the terminal saying: 
 
[Warning][2023/05/23:14:20:06] PBC time out, result: 1
QThread::start: Thread creation error (Resource temporarily unavailable)
 
Or a pop-up error message saying:
 
boost::thread_resource_error: Resource temporarily unavailable

Sometimes it will crash
 
Customer reported version
nuke.14.0v4 hiero.13.2v3
 
Customer reported platform
centos7
 
Steps to reproduce
 
1) Open Nuke Studio
 
2) File>Import Folder(s)... and import this folder: /netshare/support/4Pete/footage/megaVersionsMOV/DNxHD
 
3) Open the varient_001 bin, select all the items and add it to a new sequence (sometimes the boost error will happen here)
 
4) Open the varient_002 bin, select all the items and add it to the sequence as a new track
 
5) Delete the varient_002 bin, so all the clips go offline in the sequence:

 
 
6) Switch to the Sync Session workspace, then press Host, leaving the settings at default and Start
 
7) Open a second Nuke Studio session
 
8) In the second session, switch to the Sync Session workspace, then press Connect, leaving the setting at default and Connect
 
9) File>Import Folder(s)... and import this folder: /netshare/support/4Pete/footage/megaVersionsMOV/DNxHD/varient_002
 
10) Drag the varient_002 bin to Match Media in the Spreadsheet view, and match with all the default settings
 

After this point one or both of Nuke Studio sessions are unstable

 
11A) Try playing back the host or client Nuke Studio sessions, one or both might not playback
11B) Try scrubbing the timeline in the host or client Nuke Studio sessions, one or both might not update the viewer
11C) Try opening any of the clips in a new viewer in the host or client Nuke Studio sessions, one or both might not update
 

Sometimes one or both of the Nuke Studio session will crash when doing step 11
 
12) Check the Nuke Studio session terminals, it will be filled with errors like: 
 
[Warning][2023/05/23:14:20:06] PBC time out, result: 1
QThread::start: Thread creation error (Resource temporarily unavailable)
 
Expected behaviour
For Nuke Studio to be usable after importing DnxHD files during a Sync Review session
 
Actual behaviour
One or both of the sessions will become unstable and sometimes crash
 
Workaround
Unknown.
 
Reproduced by support
This bug has been reproduced in:
Nuke Studio 14.0v4 - CentOS 7
Nuke Studio 13.0v1 - CentOS 7
 
Unable to reproduce bug in:
Nuke Studio 14.0v4 - Windows 10, macOS Monterey
 
Earliest version tested
Nuke Studio 13.0v1 - Importing clips and matching media did not sync automatically before this version, so did not hit the issue, but did not sync until pushed either.