Because when you shutdown tomcat, it tries to serial all objects within the session scope. The
class you are referring to 'org.apache.commons.fileupload.DeferredFileOutputStream' does not
implement 'java.io.Serializable' and therefore tomcat throws this exception when trying to serialize it.
Whilst I don't know what the class 'org.apache.catalina.session.StandardManager' does, presumably is
performs a check to see if an object stored within the session is serializable before trying to
write it disk, or it might remove non-serializable object from the session scope on shutdown.
Regards,
Gareth
Anuradha S.Athreya wrote:
I have a web application running on Tomcat 5.0.
One of the features is this appln enables file upload. After an upload, If I
stop and restart the server , I get this particular expception.
SEVERE: IOException while loading persisted sessions:
java.io.WriteAbortedException: writing aborted; java.io.
NotSerializableException:
org.apache.commons.fileupload.DeferredFileOutputStream
java.io.WriteAbortedException: writing aborted;
java.io.NotSerializableException: org.apache.commons.fileuploa
d.DeferredFileOutputStream
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1278)
at
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
at
org.apache.catalina.session.StandardSession.readObject(StandardSession.java:
1401)
at
org.apache.catalina.session.StandardSession.readObjectData(StandardSession.j
ava:895)
at
org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:463)
at
org.apache.catalina.session.StandardManager.load(StandardManager.java:390)
at
org.apache.catalina.session.StandardManager.start(StandardManager.java:703)
at
org.apache.catalina.core.ContainerBase.setManager(ContainerBase.java:542)
at
org.apache.catalina.startup.ContextConfig.managerConfig(ContextConfig.java:3
49)
at
org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:654)
at
org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:
253)
at
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSuppor
t.java:166)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4224)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1125)
at
org.apache.catalina.core.StandardHost.start(StandardHost.java:832)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1125)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:518)
at
org.apache.catalina.core.StandardService.start(StandardService.java:519)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:2345)
at org.apache.catalina.startup.Catalina.start(Catalina.java:598)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:297)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:398)
Caused by: java.io.NotSerializableException:
org.apache.commons.fileupload.DeferredFileOutputStream
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
As a solution that I found , I added this to the server.xml of Tomcat.
<Manager className="org.apache.catalina.session.StandardManager"
pathname=""/>
Can someone tell me what could be the root of this problem.
--
Gareth Evans
MSoft eSolutions Limited
Technology Centre
Inward Way
Rossmore Business Park
Ellesmere Port
Cheshire
CH65 3EN
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