dispatcher unexpected error: "failed to get alert"

[Betula-L]

What did you do?
Nothing.

What did you expect to see?

There should be no error as described in code.

alertmanager/dispatch/dispatch.go

Line 482 in 0c0c6bd

// This should never happen.

Environment

• System information:

Linux 4.9.0-8-amd64 x86_64

• Alertmanager version:

alertmanager, version 0.19.0 (branch: HEAD, revision: 7aa5d19)
build user: root@587d0268f963
build date: 20190903-15:01:40
go version: go1.12.8

• Logs:

No more log expected below.

 level=error ts=2020-06-26T02:48:40.800Z caller=dispatch.go:443 component=dispatcher aggrGroup="{}/{alarm_group=~\"^(?:it)$\"}:{alertname=\"printer_device_status\"}" msg="failed to get alert" err="alert not found"

[simonpasquier]

Thanks for your bug report. Can you reproduce the issue with v0.21.0? I suspect that it has been fixed by #2040.

[Betula-L]

@simonpasquier It is not fixed by v0.21.0. I suspect it's caused by fingerprint. I am trying to write a script to reproduce it.