Panic on groupby

[yosiat]

Hi,
I got panic while I used groupBy in my tick script.

I don't think this is a good strategy for not implemented features, I think it should be an error that will be logged.
For fixing this I needed for remove my Kapacitor data folder and only then my service got up.

[nathanielc]

Can you post the panic stack trace?

[yosiat]

The panic is from here, on the default case -

https://github.com/influxdata/kapacitor/blob/master/group_by.go

[nathanielc]

Perfect thanks, Agreed since it makes it hard to restart Kapacitor I will change the error behavior.

[yosiat]

I think it should be validation on the "wants" and "provides" of each node.

If I am connecting window node to group node, on the define request I should get errors the window provides batch and group wants stream.