Logging configuration changes

Kibana 8.0.0 and later uses a new logging system. Before you upgrade, read the documentation for your Kibana version.

Parameter	Log record in pattern format	Legacy log record in text format
@timestamp	ISO8601_TZ `2012-01-31T23:33:22.011-05:00`	Absolute `23:33:22.011`
logger	`parent.child`	`['parent', 'child']`
level	`DEBUG`	`['debug']`
meta	stringified JSON object `{"to": "v8"}`	N/A
pid	can be configured as `%pid`	N/A

Parameter	Log record in json format	Legacy log record json format
@timestamp	ISO8601_TZ `2012-01-31T23:33:22.011-05:00`	ISO8601 `2012-01-31T23:33:22.011Z`
logger	`log.logger: parent.child`	`tags: ['parent', 'child']`
level	`log.level: DEBUG`	`tags: ['debug']`
meta	merged in log record `{... "to": "v8"}`	merged in log record `{... "to": "v8"}`
pid	`process.pid: 12345`	`pid: 12345`
type	N/A	`type: log`
error	`{ message, name, stack }`	`{ message, name, stack, code, signal }`