I am running an Elasticsearch 6.8.12 cluster and have Filebeats agent in various versions. I usually install the filebeat template using the export command :
filebeat.exe export template --es.version 6.8.12 | Out-File -Encoding UTF8 filebeat.template.json
However for all Filebeats version since 7.9.0, I cannot load the template to Elasticsearch as the template uses
flattened type for some properties, which is not available in Elasticsearch 6.8.12.
Is this a bug in the export template process in Filebeat 7.9.0 and higher ?