tomcat 재배포 금지 gen 공간

Question

나는 c3p0 연결 관리자를 닫을 때이 코드를 가지고 있습니다. 아무런 메시지도 메모리 누수의 원인이되는 스레드가 있음을 보여줍니다. 하지만 내 응용 프로그램을 다시 배포 할 때 내 perm gen memory가 계속 증가합니다.

Oct 19, 2016 11:05:48 AM org.springframework.context.support.AbstractApplicationContext doClose 
INFO: Closing WebApplicationContext for namespace 'dispatcherServlet-servlet': startup date [Wed Oct 19 10:41:03 PHT 2016]; parent: Root WebApplicationContext 
2016-10-19 11:05:48 - [INFO ] CRMContextListener - Trying to Close 
2016-10-19 11:05:53 - [INFO ] CRMContextListener - Close Success 
Oct 19, 2016 11:05:53 AM org.springframework.context.support.AbstractApplicationContext doClose 
INFO: Closing Root WebApplicationContext: startup date [Wed Oct 19 10:40:53 PHT 2016]; root of context hierarchy 
Oct 19, 2016 11:05:53 AM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc 
SEVERE: A web application registered the JBDC driver [oracle.jdbc.OracleDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. 
Oct 19, 2016 11:06:03 AM org.apache.catalina.core.StandardContext stop 
INFO: Container org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/crmdev] has not been started 
Oct 19, 2016 11:06:04 AM org.apache.catalina.startup.HostConfig checkResources 
INFO: Undeploying context [/crmdev] 

이

은

public void contextDestroyed(ServletContextEvent sce) { 
    logger.info("Trying to Close"); 

    for (Object o : C3P0Registry.getPooledDataSources()) { 
     try { 
      ((PooledDataSource) o).close(); 
     } catch (Exception e) { 
      logger.info("No thread was open..."); 
     } 
    } 

    logger.info("Close Success"); 
} 

그리고 여기가 C3P0

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> 
    <property name="driverClass" value="oracle.jdbc.driver.OracleDriver" /> 
    <property name="jdbcUrl" value="jdbc:oracle:thin:@sph-pdc-vm 1042:1521:DEV" /> 
    <property name="user" value="TSW" /> 
    <property name="password" value="TSW2015#" /> 
    <property name="minPoolSize" value="2" /> 
    <property name="maxPoolSize" value="20" /> 
    <property name="initialPoolSize" value="5" /> 
    <property name="testConnectionOnCheckin" value="true" /> 
    <property name="idleConnectionTestPeriod" value="100" /> 
    <property name="maxIdleTimeExcessConnections" value="5" /> 
    <property name="maxStatementsPerConnection" value="10" /> 
    <property name="acquireIncrement" value="1" /> 
    <property name="statementCacheNumDeferredCloseThreads" value="1" /> 
    <property name="acquireRetryAttempts" value="2" /> 
    <property name="acquireRetryDelay" value="2000" /> 
</bean> 

Answer 1

당신은 내가 당신이를하는 것이 좋습니다 누수를 추적하려면 내 구성입니다 내 서블릿 리스너 코드입니다 this blog post of mine을보십시오.

문제를 없애려면 응용 프로그램에 ClassLoader Leak Prevention library을 추가하십시오.

오라클 JDBC 드라이버 인 known을 사용하여 이러한 종류의 누수가 발생합니다. 또한, 드라이버 (WEB-INF/lib) 또는 Tomcat에 드라이버를 유지합니까?