[LOG4J2-749] Retain the default date pattern after fixing ISO8601_PATTERN

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.1
• Fix Version/s: 2.0.1
• Component/s: Layouts, Pattern Converters
• Assignee: Remko Popma
• Reporter: Remko Popma
• Created: 27/Jul/14 02:38
• Updated: 28/Aug/14 06:34
• Resolved: 27/Jul/14 05:31

Description

Scott Harrington correctly pointed out the following (from comments on LOG4J2-670):

You're going to get complaints from more folks about changing this long-standing format, which happens to be the default if nothing is specified after the '%d'.
What I mean is, a lot of people have been getting the space separator, and they are not explicitly asking for ISO8601, and now they're going to start getting a 'T' separator.
Presence/absence of a space will affect anyone who slices up their log files using awk or cut with whitespace delimiters.

I suggest you introduce a new pattern named 'DEFAULT' (and which gets used by default):

%d{ISO8601} = yyyy-MM-dd'T'HH:mm:ss,SSS
%d{ISO8601_BASIC} = yyyyMMdd'T'HHmmss,SSS
%d = %d{DEFAULT} = yyyy-MM-dd HH:mm:ss,SSS

Issue Links

• supercedes: LOG4J2-670 DatePatternConverter ISO8601_PATTERN does not conform to ISO8601