java web工程中：tomcat 不管是tomcat 5 6 7 都是20分钟崩溃一次操作系统：Windows 2003 enterprise 64位jdk 6系列的 换了两个版本的也不行报错代码如下：
信息: Pausing Coyote HTTP/1.1 on http-8030
2012-7-20 11:38:08 org.apache.catalina.core.StandardService stop
信息: Stopping service Catalina
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/afunms] registered the JDBC 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.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/afunms] registered the JDBC driver [org.gjt.mm.mysql.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/afunms] registered the JDBC driver [com.sybase.jdbc2.jdbc.SybDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/afunms] appears to have started a thread named [Thread-2] but has failed to stop it. This is very likely to create a memory leak.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/afunms] appears to have started a thread named [Thread-3] but has failed to stop it. This is very likely to create a memory leak.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
后面都是一样的错误内存应该足够，应该不是内存问题，自己调过
信息: Pausing Coyote HTTP/1.1 on http-8030
2012-7-20 11:38:08 org.apache.catalina.core.StandardService stop
信息: Stopping service Catalina
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/afunms] registered the JDBC 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.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/afunms] registered the JDBC driver [org.gjt.mm.mysql.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/afunms] registered the JDBC driver [com.sybase.jdbc2.jdbc.SybDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/afunms] appears to have started a thread named [Thread-2] but has failed to stop it. This is very likely to create a memory leak.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/afunms] appears to have started a thread named [Thread-3] but has failed to stop it. This is very likely to create a memory leak.
2012-7-20 11:38:09 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
后面都是一样的错误内存应该足够，应该不是内存问题，自己调过
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