As long as the third-party jar is under the lib dir. no log messages appear 
what-so-ever.
As soon as I remove the jar, then using the -Dlog4j.debug=true I get the 
messages below in the activemq.log. 
There's nothing that indicates where where log4j takes its conf. file !! 
However I think it is the conf/log4j.properties, since changes to that affect 
the logging.

The JVM args are:
JVM args: -Xms1G -Xmx1G -Djava.util.logging.config.file=logging.properties 
-Dlog4j.debug=true -Dactivemq.classpath=/usr/local/activemq/conf; 
-Dactivemq.home=/usr/local/activemq -Dactivemq.base=/usr/local/activemq 
-Dactivemq.conf=/usr/local/activemq/conf -
Dactivemq.data=/usr/local/activemq/data

=======
2013-09-02 16:09:27,437 | INFO  | Refreshing 
org.apache.activemq.xbean.XBeanBrokerFactory$1@7ee49dcd: startup date [Mon Sep 
02 16:09:27 CEST 2013]; root of context hierarchy | 
org.apache.activemq.xbean.XBeanBrokerFactory$1 | main
2013-09-02 16:09:28,286 | INFO  | 
PListStore:[/usr/local/activemq/data/local/tmp_storage ] started | 
org.apache.activemq.store.kahadb.plist.PListStore | main
2013-09-02 16:09:28,393 | INFO  | Using Persistence Adapter: 
KahaDBPersistenceAdapter[/usr/local/activemq/data/kahadb] | 
org.apache.activemq.broker.BrokerService | main
2013-09-02 16:09:28,398 | INFO  | JMX consoles can connect to 
service:jmx:rmi://localhost:11098/jndi/rmi://localhost:11099/jmxrmi | 
org.apache.activemq.broker.jmx.ManagementContext | JMX connector
2013-09-02 16:09:28,590 | INFO  | KahaDB is version 4 | 
org.apache.activemq.store.kahadb.MessageDatabase | main
2013-09-02 16:09:28,610 | INFO  | Recovering from the journal ... | 
org.apache.activemq.store.kahadb.MessageDatabase | main
2013-09-02 16:09:28,610 | INFO  | Recovery replayed 1 operations from the 
journal in 0.012 seconds. | org.apache.activemq.store.kahadb.MessageDatabase | 
main
2013-09-02 16:09:28,618 | INFO  | ActiveMQ 5.6.0 JMS Message Broker (local) is 
starting | org.apache.activemq.broker.BrokerService | main
2013-09-02 16:09:28,618 | INFO  | For help or more information please see: 
http://activemq.apache.org/ | org.apache.activemq.broker.BrokerService | main
2013-09-02 16:09:28,741 | INFO  | Scheduler using directory: 
/usr/local/activemq/data/local/scheduler | 
org.apache.activemq.broker.scheduler.SchedulerBroker | main
2013-09-02 16:09:28,753 | INFO  | Installing StaticsBroker | 
org.apache.activemq.plugin.StatisticsBrokerPlugin | main
2013-09-02 16:09:28,842 | INFO  | ignoring zero length, partially initialised 
journal data file: db-1.log number = 1 , length = 0 | 
org.apache.kahadb.journal.Journal | main
2013-09-02 16:09:28,848 | INFO  | 
JobSchedulerStore:/usr/local/activemq/data/local/scheduler started | 
org.apache.activemq.broker.scheduler.JobSchedulerStore | main
2013-09-02 16:09:28,865 | INFO  | Starting StatisticsBroker | 
org.apache.activemq.plugin.StatisticsBroker | main
2013-09-02 16:09:28,879 | INFO  | Listening for connections at: 
tcp://shico.nordija.dk:61616 | 
org.apache.activemq.transport.TransportServerThreadSupport | main
2013-09-02 16:09:28,879 | INFO  | Connector openwire Started | 
org.apache.activemq.broker.TransportConnector | main
2013-09-02 16:09:28,881 | INFO  | ActiveMQ JMS Message Broker (local, 
ID:shico.nordija.dk-54546-1378130968627-0:1) started | 
org.apache.activemq.broker.BrokerService | main
2013-09-02 16:09:28,939 | INFO  | jetty-7.6.1.v20120215 | 
org.eclipse.jetty.server.Server | main
2013-09-02 16:09:29,079 | INFO  | ActiveMQ WebConsole initialized. | 
org.apache.activemq.web.WebConsoleStarter | main
2013-09-02 16:09:29,080 | INFO  | started 
o.e.j.w.WebAppContext{/admin,file:/usr/local/apache-activemq-5.6.0/webapps/admin/}
 | org.eclipse.jetty.server.handler.ContextHandler | main
2013-09-02 16:09:29,096 | INFO  | Logging to 
org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog 
| org.mortbay.log | main
2013-09-02 16:09:29,129 | INFO  | Initializing Spring FrameworkServlet 
'dispatcher' | /admin | main
2013-09-02 16:09:29,230 | INFO  | ActiveMQ Console at http://0.0.0.0:8161/admin 
| org.eclipse.jetty.webapp.WebAppContext | main
2013-09-02 16:09:29,243 | INFO  | started 
o.e.j.w.WebAppContext{/demo,file:/usr/local/apache-activemq-5.6.0/webapps/demo} 
| org.eclipse.jetty.server.handler.ContextHandler | main
2013-09-02 16:09:29,244 | INFO  | WebApp@1933139371 at http://0.0.0.0:8161/demo 
| org.eclipse.jetty.webapp.WebAppContext | main
2013-09-02 16:09:29,259 | INFO  | started 
o.e.j.w.WebAppContext{/fileserver,file:/usr/local/apache-activemq-5.6.0/webapps/fileserver}
 | org.eclipse.jetty.server.handler.ContextHandler | main
2013-09-02 16:09:29,259 | INFO  | WebApp@1933139371 at 
http://0.0.0.0:8161/fileserver | org.eclipse.jetty.webapp.WebAppContext | main
2013-09-02 16:09:29,325 | INFO  | Initializing Spring root 
WebApplicationContext | /amq-ajax-connector | main
2013-09-02 16:09:29,496 | INFO  | started 
o.e.j.w.WebAppContext{/amq-ajax-connector,file:/usr/local/apache-activemq-5.6.0/webapps/amq-ajax-connector/}
 | org.eclipse.jetty.server.handler.ContextHandler | main
2013-09-02 16:09:29,501 | INFO  | MessageServlet init-param: protocolVer = v2 | 
com.nordija.activemq.web.MessageServletFilter | main
2013-09-02 16:09:29,501 | INFO  | MessageServlet init-param: timeToLive = 
86400000 | com.nordija.activemq.web.MessageServletFilter | main
2013-09-02 16:09:29,502 | INFO  | MessageServlet init-param: destination = 
stat.inbound | com.nordija.activemq.web.MessageServletFilter | main
2013-09-02 16:09:29,502 | INFO  | MessageServlet init-param: type = queue | 
com.nordija.activemq.web.MessageServletFilter | main
2013-09-02 16:09:29,511 | INFO  | Initializing Spring FrameworkServlet 'pinger' 
| /amq-ajax-connector | main
2013-09-02 16:09:29,612 | INFO  | Nordija's Web Interface to ActiveMQ at 
http://0.0.0.0:8161/amq-ajax-connector | org.eclipse.jetty.webapp.WebAppContext 
| main
2013-09-02 16:09:29,637 | INFO  | Started [email protected]:8161 | 
org.eclipse.jetty.server.AbstractConnector | main
===========

Regards,
-Farhad

On Sep 2, 2013, at 3:47 PM, gtully [via ActiveMQ] 
<[email protected]> wrote:

> activemq uses slf4j over log4j by default and picks up 
> log4j.configuration from ./conf/log4j.properties 
> 
> use -Dlog4j.debug=true as a jvm system property on the start script 
> and activemq --console to see where log4j is getting its configuration 
> from in your case. 
> log4j.debug causes log4j to system.out its config 
> 
> On 2 September 2013 14:22, farhad <[hidden email]> wrote:
> 
> > Hi, 
> > Has anybody ever encountered the same problem as I'm having right now? The 
> > problem is that whenever I copy a jar-file (a jar file consisting a single 
> > java class) of my own into the lib directory, then activemq stops logging. 
> > The jar file is needed since I have a couple of route definitions in the 
> > activemq.xml which invokes the class in the jar. 
> > Apart from logging everything runs without any problem. 
> > 
> > I appreciate any help. 
> > Regards, 
> > Farhad Dehghani 
> > 
> > 
> > ActiveMQ: 5.6.0 
> > java version: "1.6.0_51" 
> > OS: Mac osx 
> > 
> > 
> > 
> > -- 
> > View this message in context: 
> > http://activemq.2283324.n4.nabble.com/Adding-a-third-party-jar-to-the-lib-dir-disables-logging-tp4671024.html
> > Sent from the ActiveMQ - User mailing list archive at Nabble.com.
> 
> 
> 
> -- 
> http://redhat.com
> http://blog.garytully.com
> 
> 
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> ??!!, click here.
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