Sometimes it can be useful to know what metadata extractor that is actually used when you upload a document. Turning on Metadata Extraction logging is a good idea to get on top of what is happening. Set the following property in log4j2.properties:
logger.alfresco-repo-content-metadata.name=org.alfresco.repo.content.metadata logger.alfresco-repo-content-metadata.level=debug
What about the properties? It is likely that you will struggle to figure out what properties are extracted and their names. You can have this logged with the following log file configuration:
logger.alfresco-repo-content-metadata-AbstractMappingMetadataExtracter.name=org.alfresco.repo.content.metadata.AbstractMappingMetadataExtracter logger.alfresco-repo-content-metadata-AbstractMappingMetadataExtracter.level=debug
This log configuration is set to some other log level out-of-the-box so you need to specifically re-configure it to be able to see something. Now when running you will also see the extracted doc properties.