Forum Discussion
Notebook randomly failed with error SSL: UNEXPECTED_EOF_WHILE_READING
Hi KZ_DevOps ,
Transient errors are common in cloud platforms like Microsoft Fabric and may occur due to temporary backend or network conditions. These cannot be fully avoided from the client side, and there are no SSL or notebook configuration changes that will prevent them. The recommended approach is to implement retry logic with exponential backoff and monitor error frequency.
Microsoft documentation references:Fabric Notebooks troubleshooting guide - Microsoft Fabric | Microsoft Learn
Troubleshoot the Warehouse - Microsoft Fabric | Microsoft Learn
Troubleshoot connectors - Microsoft Fabric | Microsoft Learn
Hi KZ_DevOps,
Transient SSL errors occur when the Fabric/Kusto backend temporarily closes or resets connections (load balancing/short network blips).
What you are already doing is the right workaround. To improve further, I would suggest to:
- Use retries with exponential backoff, where each retry waits progressively longer (for example, 2s for 1st retry, 4s for 2nd, then 8s and so on), instead of retrying immediately, reducing pressure on the service.
- Monitor frequency, and escalate to support if the errors become persistent.
In short, it is a known observation and no code or setup fault.