Bug Since 2020.1.11b importing of Assets or Unitypackages gets stuck with 100% CPU usage

Hi,

since I upgraded from 2020.1.06b to 2020.1.11b and now 2020.1.16b I'm not able to finish importing assets or Unitypackages it gets stuck probably at the last file and is maxing out my CPU to 100% and after awhile the timer stops reacting and is not counting the time passed any more Unity and my system becomes unresponsive and the only way to shut down Unity is through Task Manager with a 100% CPU lag.

Please fix this I never had this ever happen before and like I said 06b worked

 

I have this same problem, whenever i do anything to an object (move, apply a component, ect) its hangs for a 30-60 seconds on "finishing import"

 

@mxf5351 Try upgrading to the 2020.1 stable version not beta, it is gone for me right now.

 

I got this bug just now using 2020.1.15f1. I am going to report it but this isn't acceptable. This should NOT BE HAPPENING.
This is just a 500mb model pack of some dragons how is it causing 100% to decompress?

This error occurs with the Elemental Dragons Pack only from the asset store. I wager it's to do with stupidly large smooth textures tga that are around 60K each in file size. I think Unity should ban formats that are not PNG and that are over 20K in size.

There was no way around the issue, I had to just wait for Unity to do it's thing which took 7 minutes on my gaming rig and it made it unusable with 100% cpu until it finished.

So it decompressed this 500mb pack into several GB because the author I suspect was able ot get away with poor texture compression. This should be a 100MB pack tops but it's not.

On top of this I get an error for each dragon which is 6 of them, who knows if it's connected or not:
"You are trying to replace or create a Prefab from the instance 'VolcanoDragon_Demo' that references a missing script. This is not allowed.
Please change the script or remove it from the GameObject."

I already reported issues with the package manager, a bug regarding Unity setting importing cameras and lights to true which shouldn't be on by default in the fbx files and now this bug.

The asset store users should not be allowed to upload textures larger than 20MB of any kind without asset store reviews not being notified. The review team should block any uploads using TGA or TIFF or any other non PNG format because it's very bad for Unity. There are several smoothness maps going at 60MB each....that's right-smoothness maps....how did this slip by?
Why did the asset store review team not tell the author that needs to be fixed?

-There are files named as "demo's" for each dragon but they are just packages that do nothing but install stuff that should already be in the package. There are no no demo scenes to speak of.

-There is 1 fbx per animation instead of 1 fbx per dragon with all the animations in it.
When encountering assets like this you will have to spend more time fixing it than getting it workable for games which means less time spent making games and more time fixing stuff which should already be fixed. This pack is not game ready and shouldn't have got through the store period.

-Again 60MB TGA Smoothness maps for each dragon....

*Update I think I know the cause of the issue now it's definitely the TGA files.
I upgraded the model to HDRP shader and it once again 100% cpu for a couple minutes just to upgrade 1 dragon to HDRP. Wow this file is unoptimized.

 

The post above I noticed I did not link to the asset out of respect but since it's a bug it is necessary to link it now.
You should speak to the asset store developer to get a voucher for the asset and try importing it into Unity as this asset is a great example of the 100% cpu bug and issues. My suspection is that Unity struggles with large textures and there are a few in there tga formats around 60MB but it could be other issues causing the spike too. Of course the current trend shows this 100% CPU issue occurs on mostly model packages. There is a fbx regression bug going around but there are other issues too.

https://assetstore.unity.com/packag...res/elemental-dragons-pack-117306#description

On a side note I sent an email to Unity asset store team about compensation for having to spend thousands of dollars and getting not very much further in game dev because Unity keeps doing something stupid to break stuff or complicate things. The poor chap thought I was talking about a specific product refund....shows about where the mentality of these folks are.

 

Yes that would be correct after about 10 minutes things go back to normal but we are talking about 100% CPU on an i7 with 16GB of Ram as in my PC literally slows to a crawl over many 1mb fbx files and 60Mb textures making browsing while I wait laggy as hell....an issue which I never experienced in older Unity versions.

I am sure it's the importation of the 60MB smoothness map I complained about. Have you tested the asset out yet?

As for whether this bug is really different from the OP post I don't know because he never mentioned how long he waited, as after a while can mean after 5 when his asset may require 10 minutes. Sometimes Unity seems to stop responding when importing assets but I know this is just a display issue it is actually still importing and just waiting long enough should fix it assuming something else doesn't mess it up like ram issues.

 

Got a similar issue here with 2020.1.17f1. Importing assets for XR support takes ages (~45 minutes). Even simple PNGs seem to be taking a long time. It is maxing out my Surface Book 2 i7 with 16GB RAM.

 

I am getting the same issues. When i try to import any skyboxes. Unity 2020.1.17f1
The importer stops at 83%. This morning I tried to import Skybox Series Free. It has 16 free skyboxes. It took over 45minutes. I ended up force quitting unity through the task manager. In older versions it would take a minute at most.

My pc spec is
i7processor
16 gig ram
Nvidia Gforce RTX 2060 - 6gig

 

I'm currently having this exact issue on Unity 2021.3.2f1 (but the issue occurred to me since much earlier versions too, circa 2020.x).
After the last file, the (re)import process gets stuck on "Finishing Import", then I have to kill the Unity process on Task Manager. Or worse, I have to force reboot my PC (because my system gets too much unresponsive at that point).

For context, my hardware is:
Intel(R) Pentium(R) CPU G2030 @ 3.00GHz (2 cores, 2 threads)
12 GB RAM
AMD Radeon R7 350 Series, 2 GB GPU

My processor is very old (I need an upgrade ), so this may be one of the causes of the bug. (too few cores/threads)

I tried the -job-worker-count command line suggested by @AljoshaD, but my Editor still lags/freezes at "Finishing Import" every time, no matter what value I set -job-worker-count to (0 or 1 are the permitted values in my case).

 

I have this issue with 2021.3.6f1. It's a large textures asset (Terrain Textures - 4K) 7.53 GB and 380 files. High 100% CPU when downloading and it takes a looong time. I worked around it by mouse clicking on the banner bar at the top of the window (I found it by dragging the window around). For some reason this stops the "progress" indicator in the Package Manager and CPU (and GPU) usage drops back to normal. So I'm guessing that should point you to the reason why this bug is occurring. Some kind of update in the Editor UI is scanning the large / quantity of files to work out what's left and gagging on the file size. I've been sitting here holding down the left click mouse button for about ten minutes now and my coffee is getting cold!
{Edit}
My issue was that my c:\ drive was full. The asset store was unpacking to my Roaming (C:\Users\Zulu\AppData\Roaming\Unity\Asset Store-5.x\Texture Haven\Textures Materials) decompression must have been struggling to complete. The final resolution was to move the folder to my spare drive (mklink / j "Original folder path" "Destination folder path")