ISOLATION_STARTUP_FAILURE for Serverless

[PavloR]

Hi, I'm getting an error in my job which is using Serverless cluster: 
`[ISOLATION_STARTUP_FAILURE] Failed to start isolated execution environment. Please contact Databricks support. SQLSTATE: XXKSS`

It was working fine and then, this error appeared on 27 January. It seems like it impacts only jobs that use an autoloader.

Also, once I'm backing up to the "classic" cluster, I assume the same DBR version 15.4 as current Serverless is supposed to run - all working fine.

So, I suspect there are some ongoing issue with Serverless DBR, but I couldn't find any information about it online.

Has anyone faced the same issue? Any advice on how it can be resolved?

[Alberto_Umana]

Hi @PavloR,

Is it still failing? and could you please let me know which cloud region is your workspace on?

[PavloR]

Last time it failed for me at 2:20 CET, but now seems that it is working again.

It is the West Europe region of Azure Cloud.

[PavloR]

As mentioned before there was one successful run... But the few following failed again with the same issue. 

[byronsalty]

We're seeing the same issue. Central US region.

This started yesterday (Tuesday 1/28 afternoon) and still happening right now (Wednesday 10:30am ET)

[Alberto_Umana]

I just found an internal case opened for this, I will follow up with it. ES-1328834

[dileeshm]

Hi @Alberto_Umana, just checking in on the status of the internal case. Please let me know if there are any updates.

[byronsalty]

We're assuming this incident is related to this change:
https://learn.microsoft.com/en-us/azure/databricks/release-notes/product/2025/january

[Alberto_Umana]

Hello Team,

I see that issue is resolved, please confirm.

[dileeshm]

Yes, issue has been resolved. Thank you

[dileeshm]

@Alberto_Umana Looks like the issue resurfaced again. We started seeing "[ISOLATION_STARTUP_FAILURE] Failed to start isolated execution environment. Please contact Databricks support. SQLSTATE: XXKSS`" error with serverless compute from last night.

Could you please check and let us know.