[b84330808]

With logging.structured.format.console=ecs, every log line contains an empty node object unless logging.structured.ecs.service.node-name is set. For example, with only spring.application.name=app:

"service":{"name":"app","node":{}}

and without any service details:

"service":{"node":{}}

The other service members use whenHasLength(), but service and service.node are always written. This only writes service.node when there is a node name, and only writes service when at least one of its members has a value. service.node.name keeps the same path, so renames and excludes work as before.

ElasticCommonSchemaPropertiesTests.addToJsonMembersWhenNoNodeNameDoesNotAddNode and addToJsonMembersWhenNoServiceValuesDoesNotAddService fail without the change and pass with it.

I used Claude Code to write this change.

[philwebb]

Thanks @b84330808