![]() |
Java开发网 |
注册 |
登录 |
帮助 |
搜索 |
排行榜 |
发帖统计
|
您没有登录 |
» Java开发网 » Application Server
![]() ![]() ![]() |
![]() ![]() ![]() ![]() ![]() |
作者 | Tomcat6.0的Thisisverylikelytocreateamemoryleak异常 |
阿熊
![]() 阿熊 元老 ![]() 发贴: 5644 积分: 454 ![]() |
![]() ![]() ![]() ![]() ![]() ![]() 從Apache Tomcat 5.5升級到6.0,通常不用太大的修改,原有的Web Application就能繼續運作。不過在server.xml中設定MySQL Datasource,卻出現一串惱人的警告訊息: 2010/8/6 下午 01:54:11 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc 嚴重的: The web application [/] registered the JBDC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. 2010/8/6 下午 01:54:11 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads 嚴重的: The web application [/] appears to have started a thread named [Timer-0] but has failed to stop it. This is very likely to create a memory leak. 2010/8/6 下午 01:54:11 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads 嚴重的: The web application [/] appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed to stop it. This is very likely to create a memory leak. 更新MySQL Connector/J至最新版也沒用,似乎是Tomcat 6.0對於Memory Leak的防範變得比較雞婆智慧,才會多了這樣的警告。 既然被列為嚴重程度的警告,當然就不能視而不見,解決的方法並不難,只是要把原本設定在區段中的搬到,修改方式如下。 1. 將<Resource name="jdbc/NAME" auth="Container" type="javax.sql.DataSource" ... /> 整塊剪下,再貼到 <GlobalNamingResources> ... </GlobalNamingResources> 之間。 2. 在原本Resource標籤的位置加入<ResourceLink global="jdbc/NAME" name="jdbc/NAME" type="javax.sql.DataSource" /> 2011-11-09 10:40 tomcat memory leak 在tomcat(版本6.0.33)的 catalina.out中发现大量memory leak的日志 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap SEVERE: The web application [] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@2618d45f]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@51dce88]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 这个是由于tomcat6.0.24以后的版本有加一个监控memory leak的listener 在tomcathome/conf/server.xml <!-- Prevent memory leaks due to use of particular java/javax APIs--> <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /> 但是这个监控有bug才导致的误报 解决方式任选一种 1 把tomcat降级为6.0.24以下的版本 2 将tomcat升级为7.0.6以上的版本 3 在server.xml中去掉JreMemoryLeakPreventionListener的listener http://wiki.apache.org/tomcat/MemoryLeakProtection |
话题树型展开 |
人气 | 标题 | 作者 | 字数 | 发贴时间 |
10672 |
![]() | 阿熊 | 2365 | 2013-03-19 12:21 |
![]() ![]() ![]() ![]() ![]() |
![]() ![]() ![]() |
![]() |
![]() |
Powered by Jute Powerful Forum® Version Jute 1.5.6 Ent Copyright © 2002-2021 Cjsdn Team. All Righits Reserved. 闽ICP备05005120号-1 客服电话 18559299278 客服信箱 714923@qq.com 客服QQ 714923 |