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https://issues.apache.org/jira/browse/LOG4J2-3280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17469458#comment-17469458
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Atul Pendse commented on LOG4J2-3280:
-------------------------------------
Pull request [LOG4J2-3280 - Add support for microsecond precision in
RFC5424Layout|https://github.com/apache/logging-log4j2/pull/683] raised for
this change.
> Support for microsecond precision in RFC5424Layout
> --------------------------------------------------
>
> Key: LOG4J2-3280
> URL: https://issues.apache.org/jira/browse/LOG4J2-3280
> Project: Log4j 2
> Issue Type: New Feature
> Components: Layouts
> Affects Versions: 2.0, 2.17.0
> Environment: Tomcat 8.5.x
> Java 11
> log4j 2.17.0
> Reporter: Atul Pendse
> Priority: Major
>
> {color:#000000}Our application sends syslog messages to a centralized
> facility which requires timestamps to be in microsecond format.{color}
> {color:#000000}Our application was so far using log4j 1.12.5’s Syslog
> appender to send syslog messages, which used to format timestamps with
> microsecond precision.{color}
> {color:#000000}We are now upgrading to log4j 2.17.0, and don’t see any way to
> get microseconds included in timestamp for syslog.{color}
> {color:#000000}I am trying to log messages using SyslogAppender with RFC5424
> layout.{color}
> {color:#000000}I see that RFC5424Layout.java restricts timestamp to
> millisecond precision (e.g. 2021-12-22T22:54:33.889-08:00).{color}
> {color:#000000}RFC5424 specification also mentions support for microsecond
> precision. Here is some text from
> {color}[https://datatracker.ietf.org/doc/html/rfc5424#section-6.2.3]
> {color:#000000}Example 4{color}
> {color:#000000} 2003-08-24T05:14:15.000003-07:00{color}
> {color:#000000} This represents 24 August 2003 at 05:14:15am, 3
> microseconds into the{color}
> {color:#000000} next second. The microsecond resolution is indicated by
> the{color}
> {color:#000000} additional digits in TIME-SECFRAC. The timestamp indicates
> that its{color}
> {color:#000000} local time is -7 hours from UTC. This timestamp might be
> created in{color}
> {color:#000000} the US Pacific time zone during daylight savings
> time.{color}
>
> {color:#000000}The RFE is to add support for microsecond precision while
> formatting timestamp in RFC5424 layout{color}
> {color:#000000}A new layout attribute to define millisecond/microsecond
> precision would be a preferred way.{color}
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