Hi, I met a problem about alert sending. I found that if firing time of alert is short(<30s), the alertmanager won't send it to receivers. Here is debug log from alertmanager:
``` level=debug ts=2020-10-30T09:19:23.450Z caller=dispatch.go:135 component=dispatcher msg="Received alert" alert=CPUloadIsExtremelyHigh[1826b54][active] level=debug ts=2020-10-30T09:19:38.452Z caller=dispatch.go:135 component=dispatcher msg="Received alert" alert=CPUloadIsExtremelyHigh[1826b54][resolved] ``` the firing time of this alert is 15s, which match the prometheus statistics, but receivers can't receive either firing alert or resolved alert. I tried webhook/mail/wechat, all of them can't get this alert, so I think this is because alertmanager didn't send this short alert. Anyone know why this happened? alertmanager version is 0.20.0. best regards. -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/b00fbfc4-abc3-4d80-81fa-a96ab5b18bf8n%40googlegroups.com.
