cant get log4j to run in play! framework 2.2.1 (scala project)

Question

I cant get log4j to run in play framework 2.2.1

I use the following log4j.properties:

log4j.rootLogger=INFO
log4j.logger.deng=INFO
log4j.appender.STDOUT=org.apache.log4j.ConsoleAppender
log4j.appender.STDOUT.layout=org.apache.log4j.PatternLayout
log4j.appender.STDOUT.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n

application.conf:

application.log=INFO
application.log.path=/log4j.properties

scala usage example:

object SomeService {

  private val log = Logger.getLogger(this.getClass())

  def someMethod() = {
      log.error("test")
  }
}

If I run a test I get the following console output:

log4j:WARN No appenders could be found for logger (SomeService.class).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

Can someone help me with this please?

Thanks a lot

at least by default, Play 2 uses the logback library via the slf4j api. any reason not to use that? — Steve Waldman, Dec 23 '13 at 21:31
Gotta load the properties file. http://stackoverflow.com/questions/2288876/how-to-configure-log4j-with-a-properties-file — Harley, Dec 23 '13 at 21:42

score 3 · Accepted Answer · edited Dec 27 '13 at 18:09

3

First, get rid of the log4J stuff (which is so 2008) and just use the Logback via SLF4J that comes with Play. Even the authors of log4j would tell you that because they are also the authors of Logback.

Then create an alternative logback configuration file called application-logger.xml and copy that to the conf folder of your Play application so it gets loaded on deploy.

For more information on configuring Logback with the Play! framework, see Configuring logging

edited Dec 27 '13 at 18:09

torbinsky

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answered Dec 24 '13 at 04:28

Vidya

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1

I'm not sure if it's required or if Play/Logback default to finding it, but in our application we explicitly set "logback.configurationFile=application-logger.xml" in our application.conf. Thought I'd mention it, just in case. – torbinsky Dec 27 '13 at 18:04
Update: Play will, by default, load conf/application-logger.xml or conf/logger.xml – torbinsky Dec 27 '13 at 18:11
1

Not so in 2.3.x Play! Such files are not picked up, sadly. – Joseph Lust Jan 26 '15 at 21:15
2

What if I want the logs of an API to be printed and that API uses log4j? – yerlilbilgin May 16 '17 at 05:39
Logback doesn't play well with Spark, and some projects need both play and Spark – Yaear Ben May 20 '21 at 15:23

cant get log4j to run in play! framework 2.2.1 (scala project)

1 Answers1