about deadman rule

[yihau]

Hi there.

I have a TICKscripts looks like

var data = batch
    |query("I SELECT A MAX VALUE HERE")
        .period(10m)
        .cron('0 * * * *')

data
    |stats(60m)
        .align()
    |derivative('emitted')
        .unit(60m)
        .nonNegative()
    |alert()
        .crit(lambda: "emitted" == 0)
        .noRecoveries()
    (... omit ...)

I checked the log and ensured the query returned me records. why is deadman still trigged? (according to https://docs.influxdata.com/kapacitor/v1.6/nodes/stream_node/#deadman. I think my pipeline equals to deadman so I called it) if I do something stupid, how could I improve it?