When UDF fails we don't print any details from query code

[shcheklein]

And that's pretty much it.

It's weird that sometimes I can actually see some messages, but not in this case.

[shcheklein]

Can we do the basic research? If it fails see if we print stack trace, if fails to start for some reason also, etc.

[shcheklein]

Okay, the difference might be parallel flag. Let's check if in parallel mode we are getting actual results.

[skshetry]

Is there any output before the traceback?

[shcheklein]

yes, but it's primarily the same - stack trace to save() function or something (kinda dc internal stack trace, no details)