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Author Topic: UE4 deadlock issue fix in Coherent GT applicable to Hummingbird?  (Read 163 times)

mstorch

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Hi all,

We are using Hummingbird with UE4 and encountering a deadlock issue when reading from a pak file (which occurs on the main thread in the Hummingbird Plugin).

There is a fix in Coherent GT made last year that seems to potentially be the same issue.  The release notes for Coherent GT Version 1.12.5.2 – released 22 May 2017 state:

"Fixed a hang in asynchronous mode when two threads make overlapping calls to UISystem::WaitFor. It is now safe to call UISystem::WaitFor from multiple threads at any time. This hang manifested during startup in UE4 where contention between the main thread and the rendering thread deadlocked the engine."

Is this fix applicable to Hummingbird as well?  If so, would it be possible to get a patch that we could test out?

Thanks!

john.v

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Re: UE4 deadlock issue fix in Coherent GT applicable to Hummingbird?
« Reply #1 on: June 06, 2018, 12:23:53 AM »
Hi mstorch,

We would need additional information in order to find out what is causing the deadlock on your end.

Could you please generate a dump file of the issue and then send it to us at support@coherent-labs.com?

John V,
Support Engineer at Coherent Labs

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