listen_failed

A deedglass command stopped with this code. It comes from the CLI, not the API.

CLI · exit 1 (a failure)

What happened

The command printed one sentence that says what happened. With --json, the same sentence is error.message and this page is error.doc_url.

What to do

Run the command in the next line under the message, for example:

Another process may be using the port. Set DEEDGLASS_LISTEN to a free address.
Set DEEDGLASS_METRICS_LISTEN to a free address, or unset it.

Add -v for more detail. If the message names a setting, Configuration explains it; deedglass doctor checks the whole setup.