Package: prometheus-alertmanager Version: 0.24.0-3 Severity: important Dear Maintainer,
After upgrading to the latest release, email alerts fail to send. caller=dispatch.go:354 level=error component=dispatcher msg="Notify for alerts failed" num_alerts=2 err="warnings/email[0]: notify retry canceled due to unrecoverable error after 1 attempts: execute \"Subject\" header template: template: :1:12: executing \"\" at <{{template \"email.default.subject\" .}}>: template \"email.default.subject\" not defined We did not make changes to the default.tmpl Best Regards Martin -- System Information: Debian Release: 11.5 APT prefers stable APT policy: (900, 'stable'), (500, 'stable-updates'), (500, 'stable-security'), (400, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 5.10.0-18-amd64 (SMP w/3 CPU threads) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages prometheus-alertmanager depends on: ii adduser 3.118 ii init-system-helpers 1.60 ii libc6 2.36-4 prometheus-alertmanager recommends no packages. prometheus-alertmanager suggests no packages. -- Configuration Files: /etc/default/prometheus-alertmanager changed [not included] /etc/prometheus/alertmanager.yml changed [not included] -- no debconf information