我有一个使用 tomcat 托管的应用程序，它在 12-18 小时后停止响应，我可以访问其他应用程序，如 tomcat 管理器，即 tomcat 进程正在运行，但我部署的应用程序停止响应。
我在日志中找不到任何真正重要的东西，我可以直接得到一些原因。
我正在使用 struts2 + spring + hibernate + jasper + jquery。我的 tomcat 是 7.0.32 托管的 mysql 数据库。
请告诉我 - 如何知道究竟是什么原因，即调试它以及稍后如何修复它。
如果需要，我可以添加一些日志，但不确定要添加哪些日志以及不添加哪些日志，因此请求版主不要将此问题标记为错误或无法回答的问题，而是注释掉，我将根据需要添加/更新问题。
我已经阅读了一些相关问题，但它们与我的确实不同。
提前致谢。
catilina.out 是在服务器被我停止后创建的，简要显示以下内容
INFO: Waiting for 200 instance(s) to be deallocated
Jul 28, 2013 8:27:15 PM org.apache.catalina.core.StandardWrapper unload
INFO: Waiting for 200 instance(s) to be deallocated
Jul 28, 2013 8:27:15 PM org.apache.catalina.core.StandardWrapper unload
INFO: Waiting for 1 instance(s) to be deallocated
Jul 28, 2013 8:27:16 PM org.apache.catalina.core.StandardWrapper unload
INFO: Waiting for 1 instance(s) to be deallocated
Jul 28, 2013 8:27:17 PM org.apache.catalina.core.StandardWrapper unload
INFO: Waiting for 1 instance(s) to be deallocated
Jul 28, 2013 8:27:17 PM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
Jul 28, 2013 8:27:17 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [] 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.
Jul 28, 2013 8:27:17 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: 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.
Jul 28, 2013 8:27:17 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: 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.
Jul 28, 2013 8:27:17 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [] appears to have started a thread named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0] but has failed to stop it. This is very likely to create a memory leak.
.............
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@55cd6225]) and a value of type [org.springframework.aop.framework.Cglib2AopProxy.CglibMethodInvocation] (value [ReflectiveMethodInvocation: public java.util.List com.cursive.eclinic.processor.DoctorProcessor.list(com.cursive.eclinic.DoctorCriteria) throws java.lang.Exception; target is of class [com.cursive.eclinic.processor.DoctorProcessor]]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@1ee69725]) and a value of type [com.opensymphony.xwork2.ActionContext] (value [com.opensymphony.xwork2.ActionContext@56a2f846]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@2513679]) and a value of type [org.apache.struts2.dispatcher.Dispatcher] (value [org.apache.struts2.dispatcher.Dispatcher@21cf431f]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@55cd6225]) and a value of type [org.springframework.aop.framework.Cglib2AopProxy.CglibMethodInvocation] (value [ReflectiveMethodInvocation: public java.util.List com.cursive.eclinic.processor.TimeSlotProcessor.list(com.cursive.eclinic.TimeSlotCriteria) throws java.lang.Exception; target is of class [com.cursive.eclinic.processor.TimeSlotProcessor]]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@1ee69725]) and a value of type [com.opensymphony.xwork2.ActionContext] (value [com.opensymphony.xwork2.ActionContext@6559e819]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@2513679]) and a value of type [org.apache.struts2.dispatcher.Dispatcher] (value [org.apache.struts2.dispatcher.Dispatcher@21cf431f]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@55cd6225]) and a value of type [org.springframework.aop.framework.Cglib2AopProxy.CglibMethodInvocation] (value [ReflectiveMethodInvocation: public java.util.List com.cursive.eclinic.processor.HospitalDoctorProcessor.list(com.cursive.eclinic.HospitalDoctorCriteria) throws java.lang.Exception; target is of class [com.cursive.eclinic.processor.HospitalDoctorProcessor]]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@1ee69725]) and a value of type [com.opensymphony.xwork2.ActionContext] (value [com.opensymphony.xwork2.ActionContext@7194f54a]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [] created a ThreadLocal with key of ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@2513679]) and a value of type [org.apache.struts2.dispatcher.Dispatcher] (value [org.apache.struts2.dispatcher.Dispatcher@21cf431f]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@55cd6225]) and a value of type [org.springframework.aop.framework.Cglib2AopProxy.CglibMethodInvocation] (value [ReflectiveMethodInvocation: public java.util.List com.cursive.eclinic.processor.HospitalProcessor.list(com.cursive.eclinic.HospitalCriteria) throws java.lang.Exception; target is of class [com.cursive.eclinic.processor.HospitalProcessor]]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Jul 28, 2013 8:27:18 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
INFO: Illegal access: this web application instance has been stopped already. Could not load org.apache.log4j.spi.ThrowableInformation. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1599)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1558)
at org.apache.log4j.spi.LoggingEvent.<init>(LoggingEvent.java:154)
at org.apache.log4j.Category.forcedLog(Category.java:388)
at org.apache.log4j.Category.log(Category.java:853)
at com.mchange.v2.log.log4j.Log4jMLog$Log4jMLogger.log(Log4jMLog.java:161)
at com.mchange.v2.log.log4j.Log4jMLog$Log4jMLogger.log(Log4jMLog.java:173)
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:629)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:78)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:161)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1577)
at org.hibernate.loader.Loader.doQuery(Loader.java:696)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
at org.hibernate.loader.Loader.doList(Loader.java:2232)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2129)
at org.hibernate.loader.Loader.list(Loader.java:2124)
at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:118)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1599)
at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:306)
已编辑--------
Tomcat 管理器服务器状态显示在
"http-bio-80" Max threads: 200
Current thread count: 149
Current thread busy: 146
Max processing time: 1066526 ms
Processing time: 26227.367 s
Request count: 5364
Error count: 262
Bytes received: 0.00 MB
Bytes sent: 127.51 MB
这是内存状态
虚拟机
Free memory: 36.16 MB Total memory: 362.78 MB Max memory: 494.93 MB
Memory Pool Type Initial Total Maximum Used
Eden Space Heap memory 68.31 MB 100.12 MB 136.50 MB 81.74 MB (59%)
Survivor Space Heap memory 8.50 MB 12.50 MB 17.06 MB 12.50 MB (73%)
Tenured Gen Heap memory 170.68 MB 250.16 MB 341.37 MB 232.37 MB (68%)
Code Cache Non-heap memory 2.43 MB 11.12 MB 48.00 MB 10.99 MB (22%)
Perm Gen Non-heap memory 20.75 MB 69.87 MB 82.00 MB 69.76 MB (85%)
这是什么意思？
我今天做了一件聪明的事，在它停止响应之前重新启动了 tomcat，并得到了以下日志，他们说了什么
Jul 30, 2013 8:37:32 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-80"]
Jul 30, 2013 8:37:32 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-443"]
Jul 30, 2013 8:37:32 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-bio-8009"]
Jul 30, 2013 8:37:32 PM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
Jul 30, 2013 8:37:33 PM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
Jul 30, 2013 8:37:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [] 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.
Jul 30, 2013 8:37:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: 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.
Jul 30, 2013 8:37:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: 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.
Jul 30, 2013 8:37:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [] appears to have started a thread named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0] but has failed to stop it. This is very likely to create a memory leak.
Jul 30, 2013 8:37:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [] appears to have started a thread named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] but has failed to stop it. This is very likely to create a memory leak.
Jul 30, 2013 8:37:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [] appears to have started a thread named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] but has failed to stop it. This is very likely to create a memory leak.
Jul 30, 2013 8:37:33 PM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
Jul 30, 2013 8:37:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [/eclinic] 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.
Jul 30, 2013 8:37:33 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/eclinic] 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.
Jul 30, 2013 8:37:33 PM org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["http-bio-80"]
Jul 30, 2013 8:37:33 PM org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["http-bio-443"]
Jul 30, 2013 8:37:33 PM org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["ajp-bio-8009"]
最佳答案
这个问题应该是连接问题，不是tomcat的问题。使用 hibernate 时，您还应该使用连接池。否则有可能与数据库断开连接，并且在一段时间后无法建立连接。诸如 C3P0 之类的实用程序 jar 可用于解决问题。另外请检查 tomcat 文件夹中的“catalina.out”文件以获取日志。
关于java - Tomcat 7 内的 Web 应用程序在 12-18 小时后停止响应，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17909713/