Spring MVC WebApp Issue - multithreading

Question

We are using Spring MVC 3 for our WebApplication. I see a strange behavior from the application. When a user perform a action (ex: button click) , i see the controllers logs are logged twice and so are the subsequent calls in the controller .Controllers we used are default,singleton.
So,
I would like to print the thread information in the controller(like threadName. tried Thread.getName()..was Unique).. any help?
How do i make sure that there is only one Spring container
loaded? -- any Suggestions?
log4j Prop:
`log4j.appender.ROLL_FILE=org.apache.log4j.RollingFileAppender
log4j.appender.ROLL_FILE.File=/ws/was/dept/logs/${module.jvm.instance}_module.log
log4j.appender.ROLLING_FILE.Append=true
log4j.additivity.ROLLING_FILE.Append=false
log4j.appender.ROLLING_FILE.MaxFileSize=10MB
log4j.appender.ROLLING_FILE.MaxBackupIndex=20
log4j.appender.ROLLING_FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.ROLLING_FILE.layout.ConversionPattern=[module] %d - %c -%-4r [%t] %-5p %c %x - %m
Web.xml :
<display-name>module</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:/spring/int/root-int-context.xml,/WEB-INF/spring/root- context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>`
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
..........
.........
.........
Thanks

Answer 1

Use Thread.getId() to get the unique thread ID.
Check your logger configuration - I'm guessing you are using log4j or slfj - you might have more than one logger that intercepts the message adds appenders on-top of the appenders defined in the parent logger this might cause two messages to be printed - so check if you have that and define additivity to be false.

Answer 2

I would like to print the thread information in the controller(like threadName. tried Thread.getName()..was Unique)
Use a logging framework. You can find several examples. Check here for configuring logback
How do i make sure that there is only one Spring container loaded?
I really don't understand what you mean here, but if have defined contextConfigLocation appropriately in your web.xml, the Spring container would be loaded correctly
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath*:/META-INF/spring/*.xml
</param-value>