On 4/18/2013 6:35 PM, Khurram Raza wrote:
Hi,After spending days I am writing my problem on this forum. The problem is when I undeploy a webapp or shutdown tomcat, spring WebApplicationContext is closed and spring singleton beans destroyed before webapp Servlet's destroy() method is called. This leads me to 'java.lang.IllegalStateException' in Servlet's destroy() method where I am cleaning my resources and destroying dynamically created spring beans and datasources. This happens with tomcat 7.0.39 only on Linux (fedora 17) platform. On windows this works perfectly fine on tomcat 7.0.39. I have also tried my webapp on tomcat-7.0.29 & tomcat 7.0.25 on linux but the problem persists. I have tried same webapp on tomcat-7.0.29 & tomcat-7.0.23 on windows and this work fine without any problem. So I am not sure why it breaks in Linux environment. Here is the log snippet generated on both Linux and Windows: Windows (webapp log snippet) ... 2013-04-14 20:33:16,510 INFO [localhost-startStop-2] com.mycompany.servlet.DSServlet - DSServlet|destroy() 2013-04-14 20:33:16,510 INFO [localhost-startStop-2] com.mycompany.servlet.DSServlet - Releasing resources... 2013-04-14 20:33:16,510 DEBUG [localhost-startStop-2] com.mycompany.servlet.DSServlet - Spring application context: WebApplicationContext for namespace 'contoller-servlet': startup date [Sun Apr 14 20:32:53 EDT 2013]; root of context hierarchy 2013-04-14 20:33:16,510 DEBUG [localhost-startStop-2] com.mycompany.servlet.DSServlet - Obtaining 'jdbc_rdb' beans of type DSBean from the spring application context... 2013-04-14 20:33:16,510 DEBUG [localhost-startStop-2] com.mycompany.servlet.DSServlet - 'jdbc_rdb' beans obtained from the spring application context... 2013-04-14 20:33:16,510 DEBUG [localhost-startStop-2] com.mycompany.servlet.DSServlet - 'jdbc_rdb' beanName: jdbc_rdb_127.0.0.1 2013-04-14 20:33:16,947 INFO [localhost-startStop-2] org.springframework.context.support.AbstractApplicationContext - Closing WebApplicationContext for namespace 'contoller-servlet': startup date [Sun Apr 14 20:32:53 EDT 2013]; root of context hierarchy 2013-04-14 20:33:16,947 DEBUG [localhost-startStop-2] org.springframework.beans.factory.support.AbstractBeanFactory - Returning cached instance of singleton bean 'lifecycleProcessor' 2013-04-14 20:33:16,947 INFO [localhost-startStop-2] org.springframework.beans.factory.support.DefaultSingletonBeanRegistry - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@24e 4af4d: defining beans [springApplicationContext,/result.html,org.springframework.web.servlet.v iew.InternalResourceViewResolver#0]; root of factory hierarchy Linux (webapp log snippet) ... 2013-04-13 23:41:08,532 INFO [localhost-startStop-2] org.springframework.context.support.AbstractApplicationContext - Closing WebApplicationContext for namespace 'controller-servlet': startup date [Sat Apr 13 23:39:28 EDT 2013]; root of context hierarchy 2013-04-13 23:41:08,535 DEBUG [localhost-startStop-2] org.springframework.beans.factory.support.AbstractBeanFactory - Returning cached instance of singleton bean 'lifecycleProcessor' 2013-04-13 23:41:08,536 INFO [localhost-startStop-2] org.springframework.beans.factory.support.DefaultSingletonBeanRegistry - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@243 84979: defining beans [springApplicationContext,/result.html,org.springframework.web.servlet.v iew.InternalResourceViewResolver#0,jdbc_rdb_127.0.0.1,jdbc_rdb_192.168.0 .31]; root of factory hierarchy 2013-04-13 23:41:08,537 INFO [localhost-startStop-2] com.mycompany.servlet.DSServlet - -> DSServlet|destroy() 2013-04-13 23:41:08,544 INFO [localhost-startStop-2] com.mycompany.servlet.DSServlet - -> Releasing resources... 2013-04-13 23:41:08,545 DEBUG [localhost-startStop-2] com.mycompany.servlet.DSServlet - -> Spring application context: WebApplicationContext for namespace 'controller-servlet': startup date [Sat Apr 13 23:39:28 EDT 2013]; root of context hierarchy 2013-04-13 23:41:08,546 DEBUG [localhost-startStop-2] com.mycompany.servlet.DSServlet - -> Obtaining 'jdbc_rdb' beans of type DSBean from the spring application context... 2013-04-13 23:41:08,577 ERROR [localhost-startStop-2] com.mycompany.servlet.DSServlet - Unable to releaase resources. java.lang.IllegalStateException: BeanFactory not initialized or already closed - call 'refresh' before accessing beans via the ApplicationContext at org.springframework.context.support.AbstractRefreshableApplicationContex t.getBeanFactory(AbstractRefreshableApplicationContext.java:172) ~[spring-context-3.2.0.RELEASE.jar:3.2.0.RELEASE] at org.springframework.context.support.AbstractApplicationContext.getBeanNa mesForType(AbstractApplicationContext.java:1174) ~[spring-context-3.2.0.RELEASE.jar:3.2.0.RELEASE] at com.mycompany.servlet.DSServlet.destroy(DSServlet.java:120) ~[relaism-db-0.1.0.jar:na] at org.apache.catalina.core.StandardWrapper.unload(StandardWrapper.java:148 1) [catalina.jar:7.0.39] at org.apache.catalina.core.StandardWrapper.stopInternal(StandardWrapper.ja va:1842) [catalina.jar:7.0.39] at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) [catalina.jar:7.0.39] at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.ja va:5561) [catalina.jar:7.0.39] at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) [catalina.jar:7.0.39] at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java :1575) [catalina.jar:7.0.39] at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java :1564) [catalina.jar:7.0.39] at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) [na:1.7.0_17] at java.util.concurrent.FutureTask.run(FutureTask.java:166) [na:1.7.0_17] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.jav a:1145) [na:1.7.0_17] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja va:615) [na:1.7.0_17] at java.lang.Thread.run(Thread.java:722) [na:1.7.0_17] Comparing highlighted portion clearly shows that in windows environment, DSSerlet.destroy() method is called, resources are cleaned, spring web application context is closed and spring singleton beans are destroyed. However, as depicted in Linux log snippet, it is vice versa. Although the webapp works perfectly fine as this problem happens when webapp is updepolyed or tomcat is shutdown but still I cannot ignore this because the datasources are still running and needs to be destroyed to avoid memory leaks before undeploying webapp. I will very much appreciate if I can get any help in finding a solution to this problem. Thanks in advance. - Raza.
Do your initialization and shutdown in a ServletContextListener? They are guaranteed to be run in the order listed in web.xml on context startup and in the reverse order on context shutdown.
Another thought - is there a reason why you're not using a JNDI - addressable connection pool?
. . . just my (probably wrong) two cents. /mde/ --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
