从持久存储异常加载会话 [英] exception loading sessions from persistent storage
问题描述
我对spring petclinic 应用程序进行了许多更改.目前，当我使用 eclipse run as...run on server 在新的 tomcat 服务器实例中启动应用程序时，我收到以下错误消息:
I have made many changes to the spring petclinic application. At the moment, I am getting the following error message when I launch the application in a new instance of tomcat server using eclipse run as...run on server:
SEVERE: Exception loading sessions from persistent storage
服务器和应用程序随后能够成功启动，但我想修复导致错误消息的任何内容.谁能告诉我如何解决此错误消息?
The server and application then subsequently are able to launch successfully, but I would like to fix whatever is causing the error message. Can anyone show me how to get past this error message?
堆栈跟踪未列出应用程序中的任何文件，因此我不知道在应用程序代码中的何处查找以解决问题.您可以查看 github 上的 petclinic 代码 以查看应用程序的结构，如果这有助于您了解在哪里我应该寻找问题.这是堆栈跟踪:
The stack trace does not list any file from the application, so I don't know where to look in the application code to fix the problem. You can look in the petclinic code at github to see the structure of the application, if that helps you see where I should look to find the problem. Here is the stack trace:
INFO EhCacheManagerFactoryBean - Initializing EhCache CacheManager
INFO ContextLoader - Root WebApplicationContext: initialization completed in 4376 ms
Dec 16, 2013 2:51:56 PM org.apache.catalina.session.StandardManager doLoad
SEVERE: IOException while loading persisted sessions: java.io.EOFException
java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2280)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2749)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:779)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:279)
at org.apache.catalina.util.CustomObjectInputStream.<init>(CustomObjectInputStream.java:58)
at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:246)
at org.apache.catalina.session.StandardManager.load(StandardManager.java:204)
at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:491)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Dec 16, 2013 2:51:56 PM org.apache.catalina.session.StandardManager startInternal
SEVERE: Exception loading sessions from persistent storage
java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2280)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2749)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:779)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:279)
at org.apache.catalina.util.CustomObjectInputStream.<init>(CustomObjectInputStream.java:58)
at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:246)
at org.apache.catalina.session.StandardManager.load(StandardManager.java:204)
at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:491)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Dec 16, 2013 2:51:56 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'petclinic'
推荐答案
这与 Tomcat 无法加载先前关闭时保存的先前序列化 Web 会话有关.这可能是因为 Tomcat 没有完全关闭，因此会话对象在序列化过程中被破坏了.
This is to do with Tomcat not being able to load previously serialized web sessions that had been saved on an earlier shutdown. This may be because Tomcat didn't shutdown cleanly and so session objects got corrupted during serialization.
消除此错误的一种方法是禁用跨重新启动的会话持久性.您可以通过编辑文件 CATALINA_HOME/conf/context.xml 并将 pathname 属性设置为空来执行此操作细绳.这在 Tomcat 7 的文件中有详细记录:
One way to make this error go away would be to disable session persistence across restarts. You can do this by editing the file CATALINA_HOME/conf/context.xml and setting the pathname attribute of the <Manager> to an empty string. This is well documented in the file for Tomcat 7:
<!-- Uncomment this to disable session persistence across Tomcat restarts -->
<Manager pathname="" />
您还应该在 Tomcat 关闭时从 CATALINA_HOME/work/Catalina/localhost/ 文件夹中删除所有旧的 session.ser 文件.
You should also delete any old session.ser files from the CATALINA_HOME/work/Catalina/localhost/<appName> folder whilst Tomcat is shutdown.
如果需要跨重新启动的会话持久性，这在您的情况下可能是不可接受的.在这种情况下，需要进一步调试问题.
This may not be acceptable in your case if session persistence across restarts is needed. In which case further debugging of the issue would be necessary.
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