logging - How to log from an app included in Solr running in tomcat -

we using tomcat 6.0.35 solr 4.0.0. placed jar-files in lib directory in instancedir of our solrcore. in our jar's there classes using intern logback configuration/classes.(a facade logging-framework (currently logback/slf4j). support additional functinality,) can't make work, logging of our jar's working.

we tried:

1. editing default logging.properties. in case, log belong our logger, contain log statements of our application.

2. giving solr logback.xml file, logback jars in lib folder. in case havn't got logs in our logfiles.

3. making tomcat using logback log. in case recieved different logs tomcat , other classes in org.apache.catalina. there no log solr nor our application in log files

what can customize our logging? use logback if it's possible.

at least enough make solr using logback. therefore placed logback-core , loback-classic jar file in solr's war file , gave logback configuration file program parameter , disabled solr's standard logging. don't think best solution worked.

• we unpacked solr.war file:

  jar  xfv solr.war  rm solr.war 

• and copied logback-core-.jar , logback-classic-.jar folder web-inf/lib

  cp /somepath/logback-core-<version>.jar /somepath/logback-classic-<version>.jar web-inf/lib 

• at least build war file again

  jar cfv solr.war * 

now adjusted programs parameters: we've set following options in instance.env file

export logging_config="-dnop"  export java_opts="$java_opts -dlogback.configurationfile=/somepath/logback.xml" 

then solr logged via logback specified in logback.xml file. received logs our application in solr too.