In the man page you linked to I found

*%s *The number of seconds since the Epoch, 1970-01-01 00:00:00
              +0000 (UTC). (TZ) (Calculated from/mktime(tm)/.)

There is nothing under a second, so I combine it with %d{SSS}:
log4j.appender.R.layout.ConversionPattern=[%p] [%d{%s}.%d{SSS}]: %m%n
> [INFO] [1480614023.833]: message

Works for me :-)

Thank you so much!
Felix

On 12/01/2016 06:15 PM, Robert Middleton wrote:
If I'm understanding the code correctly, in your %d{} specifier, you can define a custom format using apr_strftime(). I'm assuming that this means you can use the standard strftime() specifiers, but the documentation for APR is somewhat lacking.

http://man7.org/linux/man-pages/man3/strftime.3.html

-Robert Middleton

On Thu, Dec 1, 2016 at 11:34 AM, Thorsten Schöning <tschoen...@am-soft.de <mailto:tschoen...@am-soft.de>> wrote:

    Guten Tag Felix Endres,
    am Donnerstag, 1. Dezember 2016 um 16:37 schrieben Sie:

    > is it possible to print a unix timestamp, i.e. seconds since
    1970 in the
    > PatternLayout (or any other layout)? Optimally I would like a
    fractional
    > pattern showing microseconds.

    Is your question about the format or timezone handling? A format
    including fractionals is possible and the default already when only
    using "%d", but I'm pretty sure it's not supporting microseconds:

    > %d{yyyy-MM-dd HH:mm:ss,SSS}
    > 2016-12-01 17:20:43,764

    Have a look at the classes datepatternconverter, strftimedateconverter
    and simpledateformat, which is used depending on your configuration
    and might support timezone related stuff. At least there some "Z"
    mentioned in simpledatformat, resulting in a calculation of timezone
    offsets in "RFC822TimeZoneToken".

    Mit freundlichen Grüßen,

    Thorsten Schöning

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