Email Pulses stopped sending with error: Metabase.notification.send Error sending to channel channel/email: Error registering fonts: Metabase will not be able to send Pulses. This is a known issue with certain JVMs.

[jysd]

Error message below is in the Metabase logs.

Metabase.notification.send Error sending to channel channel/email: Error registering fonts: Metabase will not be able to send Pulses. This is a known issue with certain JVMs. See https://github.com/metabase/metabase/issues/7986 and for more details

We are running the latest as of today - Metabase v0.63.19 (Cloudron 3.27.0).

Unclear to me if this needs to be fixed within Cloudron repackaging or if a bug was introduced on the Metabase side?

Any suggestions?

[joseph]

Do you have a full stack trace? That report is from 2018 and was fixed long ago. Cloudron also uses OpenJDK 21 in the package.

[jysd]

I'll look for a stack trace. I'm not sure there's more than what's written here. I did crosspost to the Metabase discourse and someone suggested edits to the dockerfile (although I don't actually know how Cloudron packaging works).

# Fix /tmp permissions and rebuild font cache (must be root)
RUN mkdir -p /tmp && chmod 1777 /tmp
RUN fc-cache -fv

https://discourse.metabase.com/t/alerts-email-pulse-not-sending-metabase-notification-send-error-sending-to-channel-channel-email-error-registering-fonts-metabase-will-not-be-able-to-send-pulses/338080/2

[jysd]

There's no stack trace I could find. It comes up in the Metabase logs viewer, and it looks like it's catching the exception and logging it, rather than throwing a full stack trace. Here's the full log lines to give you an idea.

2026-10-01T12:36:02-07:00 INFO metabase.notification.send Done processing notification
2026-10-01T12:36:02-07:00 ERROR metabase.notification.send Error sending to channel channel/email: Error registering fonts: Metabase will not be able to send Pulses. This is a known issue with certain JVMs. See https://github.com/metabase/metabase/issues/7986 and for more details.