CODEWITHSUNDEEP
tomcatloggingsolr
haydenmuhl
haydenmuhl

Reputation: 6146

How to get Solr to use a logger other than root with Tomcat?

I have Solr 4 running in Tomcat 6. The application is running just fine, but I'm having trouble getting Tomcat to write the logs where I want. Here are the relevant parts of my conf/logging.properties file.

handlers = 1catalina.org.apache.juli.FileHandler, \
           2localhost.org.apache.juli.FileHandler, \
           3manager.org.apache.juli.FileHandler, \
           4host-manager.org.apache.juli.FileHandler, \
           5solr.org.apache.juli.FileHandler, \
           java.util.logging.ConsoleHandler

.handlers = 1catalina.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler

############################################################
# Handler specific properties.
# Describes specific configuration info for Handlers.
############################################################

5solr.org.apache.juli.FileHandler.level = FINE
5solr.org.apache.juli.FileHandler.directory = /var/log/solr
5solr.org.apache.juli.FileHandler.prefix = solr.

# SNIP...

############################################################
# Facility specific properties.
# Provides extra control for each logger.
############################################################

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/solr].level = INFO
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/solr].handlers = 5solr.org.apache.juli.FileHandler

# SNIP...

I've snipped out the settings for Handlers 1 - 4, because I have not changed them from what they were when I installed Tomcat.

When I start up Tomcat, it creates the following log files.

$ ls -l $CATALINA_HOME/logs
-rw-rw-r-- 1 webapp webapp 11836 Feb  4 18:29 catalina.2013-02-04.log
-rw-rw-r-- 1 webapp webapp 11836 Feb  4 18:29 catalina.out

$ ls /var/log/solr -l
-rw-rw-r-- 1 webapp webapp 0 Feb  4 18:29 solr.2013-02-04.log

The files catalina.out and catalina.2013-02-04.log contain the log output for Solr. What I was trying to do with logging.properties was put the Solr logs in /var/log/solr.

I expect what happened is that Tomcat picked up my changes to logging.properties and created the log file in /var/log/solr, but Solr's log messages are not going to the right place, and end up going all the way up to the root logger.

Solr uses SLF4J, which should be able to write logs to the java.util.logging interface, but Tomcat reimplements part of that interface (JULI) to allow for having a separate logger per context. Is there some incompatibility between SLF4J and JULI? How can I get around this?

Upvotes: 1

Views: 679

Answers (1)

Jayendra
Jayendra

Reputation: 52799

You should set the solr handlers to the newly added handler :-

org.apache.solr.level = INFO
org.apache.solr.handlers = 5solr.org.apache.juli.FileHandler

Upvotes: 1

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