We are investigating an open file leak in our web server, and I was asked to
try to find out more about Apache Log4j.
We are using tools like pfiles (prints open file descriptors for a process)
and lsof (List Open Files) to learn how many files, the file types, and the
names of the files open in our web server process.
Below is a portion of our log4j.properties file, where we set up a Rolling
File Appender for 8 different areas.
In a multi-threaded environment like a web server, will there be only one
open file per appender, or multiple open files per appender?
It appears that the number of open logging (Log4j) files is different
running in the iPlanet environment (where open file problem is being
exhibited) versus a Tomcat web server environment (where the problem is not
being seen).
What I'm looking for is a statement that either there is only one open file
per appender, regardless of the number of threads accessing the Log4j
package, or a statement indicating there might be more than one open file
per appender in a web server.
Thanks for any information you might provide.
David Stevenson
Thomson - West
log4j.logger.com.westgroup.phoenix.user_interface2.Repository=DEBUG,
repository
log4j.logger.com.westgroup.phoenix.user_interface2.Workarea=ALL, work_area
log4j.logger.com.westgroup.phoenix.user_interface2.RenderToWestlaw=DEBUG,
e_render
log4j.logger.com.westgroup.phoenix.user_interface2.PrintRender=DEBUG,
print_render
log4j.logger.com.westgroup.phoenix.user_interface2.Workflows=DEBUG,
workflows
log4j.logger.com.westgroup.phoenix.user_interface2.workflow_manager=DEBUG,
workflow_manager
log4j.logger.com.westgroup.phoenix.user_interface2.inbox=WARN, inbox
log4j.logger.com.westgroup.phoenix.user_interface2.connection_pooling=INFO,
connection_pooling
log4j.logger.com.westgroup.phoenix.user_interface2.direct_allocates=INFO,
direct_allocates
log4j.appender.repository=org.apache.log4j.RollingFileAppender
log4j.appender.repository.File=/apps/phoenix/devd/lib/webserver/user_interfa
ce/webapps/ui/WEB-INF/repository.log
log4j.appender.repository.MaxFileSize=1024KB
log4j.appender.repository.MaxBackupIndex=7
log4j.appender.repository.layout=org.apache.log4j.PatternLayout
log4j.appender.repository.layout.ConversionPattern=%d %-10.10t %-5p
%-15.15c{1} - %m%n
log4j.appender.work_area=org.apache.log4j.RollingFileAppender
log4j.appender.work_area.File=/apps/phoenix/devd/lib/webserver/user_interfac
e/webapps/ui/WEB-INF/work_area.log
log4j.appender.work_area.MaxFileSize=1024KB
log4j.appender.work_area.MaxBackupIndex=7
log4j.appender.work_area.layout=org.apache.log4j.PatternLayout
log4j.appender.work_area.layout.ConversionPattern=%d %-10.10t %-5p
%-15.15c{1} - %m%n
log4j.appender.e_render=org.apache.log4j.RollingFileAppender
log4j.appender.e_render.File=/apps/phoenix/devd/lib/webserver/user_interface
/webapps/ui/WEB-INF/e_render.log
log4j.appender.e_render.MaxFileSize=1024KB
log4j.appender.e_render.MaxBackupIndex=7
log4j.appender.e_render.layout=org.apache.log4j.PatternLayout
log4j.appender.e_render.layout.ConversionPattern=%d %-10.10t %-5p
%-15.15c{1} - %m%n
log4j.appender.print_render=org.apache.log4j.RollingFileAppender
log4j.appender.print_render.File=/apps/phoenix/devd/lib/webserver/user_inter
face/webapps/ui/WEB-INF/print_render.log
log4j.appender.print_render.MaxFileSize=1024KB
log4j.appender.print_render.MaxBackupIndex=7
log4j.appender.print_render.layout=org.apache.log4j.PatternLayout
log4j.appender.print_render.layout.ConversionPattern=%d %-10.10t %-5p
%-15.15c{1} - %m%n
log4j.appender.workflows=org.apache.log4j.RollingFileAppender
log4j.appender.workflows.File=/apps/phoenix/devd/lib/webserver/user_interfac
e/webapps/ui/WEB-INF/workflows.log
log4j.appender.workflows.MaxFileSize=1024KB
log4j.appender.workflows.MaxBackupIndex=7
log4j.appender.workflows.layout=org.apache.log4j.PatternLayout
log4j.appender.workflows.layout.ConversionPattern=%d %-10.10t %-5p
%-15.15c{1} - %m%n
log4j.appender.workflow_manager=org.apache.log4j.RollingFileAppender
log4j.appender.workflow_manager.File=/apps/phoenix/devd/lib/webserver/user_i
nterface/webapps/ui/WEB-INF/workflow_manager.log
log4j.appender.workflow_manager.MaxFileSize=1024KB
log4j.appender.workflow_manager.MaxBackupIndex=7
log4j.appender.workflow_manager.layout=org.apache.log4j.PatternLayout
log4j.appender.workflow_manager.layout.ConversionPattern=%d %-10.10t %-5p
%-15.15c{1} - %m%n
log4j.appender.inbox=org.apache.log4j.RollingFileAppender
log4j.appender.inbox.File=/apps/phoenix/devd/lib/webserver/user_interface/we
bapps/ui/WEB-INF/inbox.log
log4j.appender.inbox.MaxFileSize=1024KB
log4j.appender.inbox.MaxBackupIndex=7
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