log4j2 KeyValuePair for .properties file

Question

How do I create a keyvaluepair in log4j2 in a propterties file?

I know in log4j version 1 it's done like:

log4j.appender.x.additionalFields={'key': 'value'}

and the XML way for it in log4j2 is:

  <KeyValuePair key="key" value="value"/>

so is way to do it for a properties file like this:

`appender.x.keyValuePair ={'key': 'value'}`

?

score 9 · Answer 1 · edited Jun 18 '18 at 16:33

9

This is a working example of how to define a key value pair for example for the Graylog2 (GELF) appender:

appender.graylog.type=GELF
appender.graylog.name=GRAYLOG
appender.graylog.server=yourhostname
appender.graylog.includeStackTrace=true
appender.graylog.additional1.type=KeyValuePair
appender.graylog.additional1.key=yarncontainer
appender.graylog.additional1.value=containerXYZ
appender.graylog.additional2.type=KeyValuePair
appender.graylog.additional2.key=anotherKey
appender.graylog.additional2.value=anotherValue

edited Jun 18 '18 at 16:33

Scolytus

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answered Dec 09 '16 at 20:17

Robert Metzger

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Any ideas how to add more than just one field? – splatch Feb 05 '18 at 17:14
That's really the holy grail here. Sadly, I was never able to find out how to do that :( – Robert Metzger Feb 06 '18 at 13:47
1

I managed to get it without "additionalFields" part - used just "additional1", "additional2" - final result got merged. I did not inspect why it works but it does. – splatch Feb 07 '18 at 00:16
2

I updated the example, I also needed to add multiple fields and verified that it works like that – Scolytus Jun 18 '18 at 16:34
I was looking at for the flink logj2 configuration file. Thank you Robert and Scolytus – baybatu Nov 27 '20 at 08:14

log4j2 KeyValuePair for .properties file

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