[LOG4J2-2755] Invalid JSON in JsonLayout

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Invalid
• Affects Version/s: 2.11.2
• Component/s: Layouts
• Assignee: Ralph Goers
• Reporter: Christian Kemper
• Created: 07/Jan/20 12:25
• Updated: 30/Jan/20 12:32
• Resolved: 30/Jan/20 12:32

Description

Using the log4j2 JsonLayout can result in invalid JSON. Some parsers could not parse this syntax.
The problem ist the attribute "nanoOfSeconds" from the timestamp:

{
  "loggerFqcn": "org.apache.catalina.valves.AccessLogValve",
  "instant": {
    "epochSecond": 1578393313,
    "nanoOfSecond": 008000
  },
  "clientIp": "-",
  "remoteHost": "192.168.0.1",
  "message": "GET /metrics HTTP/1.1",
  "status": 200,
  "size": "50",
  "referer": "-",
  "processTimeMillis": 92
}

The Attribute "nanoOfSeconds" starts with leading zeros. According to the JSON rfc4627 this is an invalid JSON number.

Is it possible to correct this and remove the leading zeros?