How do I set a default value when looking up a JNDI variable lookup with Log4J 2?

Question

I'm already successfully configuring Log4J 2 with a log4j2.xml file, and I'm successfully setting the value of a Property in the file via a JNDI variable lookup.

However, I'd like to provide a default value for the Property if the JNDI variable doesn't exist.

Is this possible?

Answer 1

Try this:

<Root level="${jndi:yourJndiVariableName:-DEFAULT}">

Generally all Log4j2 lookups follow this pattern: ${type:key:-defaultValue}.