Nucleus crash

Omniverse Isaac Sim
,
1

I have a new install on Linux Ubuntu 22.04 (bare metal, not in a Docker), and Nucleus doesn’t seem to run.

Nucleus_stopped
Nucleus_stopped1035×1074 148 KB

Info on GPU:

baxelrod@WS1:~$ nvidia-smi
Thu Dec 15 11:15:01 2022       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 525.60.13    Driver Version: 525.60.13    CUDA Version: 12.0     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA RTX A5000    On   | 00000000:61:00.0 Off |                  Off |
| 30%   30C    P8    19W / 230W |      6MiB / 24564MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
|   1  NVIDIA T400 4GB     On   | 00000000:62:00.0 Off |                  N/A |
| 38%   41C    P8    N/A /  31W |     14MiB /  4096MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A      1211      G   /usr/lib/xorg/Xorg                  4MiB |
|    1   N/A  N/A      1211      G   /usr/lib/xorg/Xorg                  9MiB |
|    1   N/A  N/A      1383      G   /usr/bin/gnome-shell                2MiB |
+-----------------------------------------------------------------------------+

Here is the log from Nucleus:
Nucleus.log (298.4 KB)

At the bottom of the log, this seems to be the issue:

2022-12-19 14:59:13 [261ms] [Error] [omni.core] [1180668] ../../../source/plugins/common/ChildProcess.cpp:stderrReadCallback():30: From process ./omni-lft-service/omni-lft-service:Traceback (most recent call last):
  File "run_server.py", line 3, in <module>
  File "lft/server.py", line 801, in run_application
  File "asyncio/base_events.py", line 616, in run_until_complete
  File "lft/server.py", line 715, in startup_server
  File "aiohttp/web_runner.py", line 121, in start
  File "asyncio/base_events.py", line 1463, in create_server
OSError: [Errno 98] error while attempting to bind on address ('127.0.0.1', 3030): address already in use
[1180666] Failed to execute script 'run_server' due to unhandled exception!

It does look like something is using port 3030. But it looks like an Omniverse thing…

baxelrod@WS1:~$ netstat -tulpn | grep 3030
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:3030          0.0.0.0:*               LISTEN      3234/./omni-lft-ser

Any assistance would be much appreciated.
Thanks,
Ben

2

Port 3030 is used for LFT. Try clickign the “restart all” button, rebooting or updating Nucleus.
If that does not help, try uninstalling Omniverse with the CleanUp tool and reinstall it.

3

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