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How can I create logs in to separate files for multiple applications deployed on the same instance of OC4J?

Posted on 2010-08-12
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Last Modified: 2013-12-01
I  am using OC4J 10.1.3.5 App server on Windows.  I have deployed 2 web applications on the same instance of OC4J where I have defined the shared library. Both applications use Struts, Spring, iBatis, apache commons libraries which I have defined as a shared library. Part of the apache loggins library I had to add log4j jar as well. So indirectly log4j-12.16.jar is declared as a shared-lib as well.

I have log4j.properties for both application pointing to different log file. But still when both applications are deployed and running, the logs are getting populated on only one file. During the deployment, I did check on webapp-classpath-first="true" setting to explicitly have log4j.properties of each individual application being load first. But nothing makes difference.

Please help.

Thanks
Jasmin
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Question by:MehtaJasmin
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by:ProgSysAdmin
ID: 33421375
If you have attempted to configure log4j with OC4J you have probably noticed that the log file ends up in ORACLE_HOME\j2ee\PROCESS_TYPE (e.g d:\oracle\j2ee\home).

This does not work if you have multiple JVM processes per instance, since they cannot both write to the same log file. Instead you should be putting the log files in
ORACLE_HOME\j2ee\PROCESSTYPE\PROCESSTYPE_PROCESSSET_PROCESSINDEX (e.g. d:\oracle\j2ee\home\home_default_island_1\ ).

You should change your log path at runtime with the PropertyConfigurator to point at this path. These oc4j system properties provide all the necessary information:

oracle.ons.oraclehome (or oracle.home) and oracle.ons.indexid
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MehtaJasmin earned 0 total points
ID: 33432778
Log4j as a shared library do not let logs create into different files for multiple application installed on the same instance of OC4J. I ended up adding log4j-1.2.16.jar file into my all web application those deployed on the same instance. There after I got logs working fine into separate files.
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