[logback-dev] [JIRA] Updates for LOGBACK-1658: LayoutPattern does not support nanoseconds format

[QOS.CH (JIRA)]

logback / LOGBACK-1658 [Open]
LayoutPattern does not support nanoseconds format

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https://jira.qos.ch/browse/LOGBACK-1658

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 Issue created
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Bertrand Renuart created this issue on 13/Aug/22 4:11 PM
Summary:              LayoutPattern does not support nanoseconds format
Issue Type:           Bug
Affects Versions:     1.3.0-beta0
Assignee:             Logback dev list
Components:           logback-classic
Created:              13/Aug/22 4:11 PM
Environment:
  PatternLayout trims the event timestamp down to milliseconds precision irrespective of the configured pattern.
  
  For instance the following config:
  {code:java}
  <appender name="LOGBACK" class="ch.qos.logback.core.ConsoleAppender">
     <encoder>
        <pattern>%date{dd-MM-yyyy'T'HH:mm:ss.n} - %msg%n</pattern>
     </encoder>
  </appender> {code}
  produces output like the following:
  {code:java}
  13-08-2022T16:05:49.211000000 - A sample log message (0)
  13-08-2022T16:05:49.213000000 - A sample log message (1)
  13-08-2022T16:05:49.213000000 - A sample log message (2)
  13-08-2022T16:05:49.213000000 - A sample log message (3)
  13-08-2022T16:05:49.213000000 - A sample log message (4)
  13-08-2022T16:05:49.213000000 - A sample log message (5){code}
  As you can see although the pattern asks for nanoseconds after the seconds only the millis are actually output with the nano parts set to zero.
  
  A quick look at the code reveals that the {{DateConverter}} gets the timestamp from the ILoggingEvent by calling {{ILoggingEvent#getTimeStamp()}} which gives the timestamp in millis instead of the new {{ILoggingEvent#getInstant()}}.
  
  See [https://github.com/qos-ch/logback/blob/master/logback-classic/src/main/java/ch/qos/logback/classic/pattern/DateConverter.java#L59-L62.|https://github.com/qos-ch/logback/blob/master/logback-classic/src/main/java/ch/qos/logback/classic/pattern/DateConverter.java#L59-L62]
  
   
Priority:             Major
Reporter:             Bertrand Renuart


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