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Common solutions

  1. Reconnect to the instance with ctrl + d and tnr connect <instance_id>
  2. Upgrade tnr. Depending on your install method, you may have to use pip install tnr --upgrade or re-download the binary from the website
  3. Restart the instance by running tnr stop <instance_id> and tnr start <instance_id> (full documentation in CLI operations)

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Logs

To assist troubleshooting, the GCP/AWS instance logs for each instance are saved to the file /var/log/syslog. On your local machine, you can view the CLI logs with cat ~/.thunder/logs. Sharing these with our team can help us quickly find a solution for your problem.

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Common errors

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Function not implemented

A common error you may encounter is some variant of “This function is not implemented.” What this means is that your program touches a portion of the CUDA API that we do not currently support. Check our prototyping mode guide for supported features, and if you encounter this, please contact us.

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SSH errors

If you encounter SSH-related errors (like Error reading SSH protocol banner or permission issues), first retry the command. For quick fixes, try restarting your instance with tnr stop <instance_id> and tnr start <instance_id>. For persistent SSH issues, see our SSH on Thunder Compute guide for alternative connection methods. To help prevent common issues and get the most out of Thunder Compute, we recommend these guides:

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Production mode as a last resort

If you continue to experience compatibility issues or errors that cannot be resolved through the above methods, consider switching to Production mode. Production mode provides maximum stability and reliability with all low-level optimizations disabled, ensuring complete compatibility for workloads that encounter persistent issues in the prototyping tier. To switch to production mode: 
tnr modify <instance_id> --mode production
Note that production mode has a higher hourly cost but guarantees predictable performance and compatibility.

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Support

The fastest way to get support is to join our discord. Our founding team will personally respond to help you as quickly as possible.