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From moffit <mof...@gmail.com>
Subject Re: Ibatis 3 - Lazy Loading and Serializable Sessions
Date Tue, 04 May 2010 12:33:16 GMT

Hi Clinton,

  The exception (thrown by Tomcat) is:

07:26:05,621 ERROR apache.catalina.session.ManagerBase - Exception loading
sessions from persistent storage
java.io.WriteAbortedException: writing aborted;
java.io.NotSerializableException:
org.apache.ibatis.executor.loader.ResultLoaderMap$LoadPair
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1333)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
	at java.util.HashMap.readObject(HashMap.java:1030)
	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:597)
	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
	at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
	at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
	at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
	at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
	at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
	at
org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1470)
	at
org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:972)
	at
org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:394)
	at
org.apache.catalina.session.StandardManager.load(StandardManager.java:321)
	at
org.apache.catalina.session.StandardManager.start(StandardManager.java:637)
	at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4476)
	at
org.apache.catalina.core.StandardContext.reload(StandardContext.java:3228)
	at
org.apache.catalina.manager.ManagerServlet.reload(ManagerServlet.java:918)
	at
org.apache.catalina.manager.HTMLManagerServlet.reload(HTMLManagerServlet.java:544)
	at
org.apache.catalina.manager.HTMLManagerServlet.doGet(HTMLManagerServlet.java:121)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
	at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:619)

I am using the ibatis-core-3.0.jar version of the library.

Thanks,

Mike


Clinton Begin wrote:
> 
> iBATIS 3 enhanced objects should be serializable.  Can you post the
> exception you're getting?
> 
> Clinton
> 
> On Mon, May 3, 2010 at 7:25 PM, moffit <moffit@gmail.com> wrote:
>>
>> Hi,
>>
>>  I noticed that this question was asked a few years ago with Ibatis 2.X
>> without any resolution.
>>
>>  Basically, lazy loaded objects are enhanced with byte-code generation.
>> The enhanced object/proxy is not serializable even though the source
>> object
>> is.  This obviously plays havoc with web applications if the source
>> object
>> is stored in the session.  A very simple and probably often used scenario
>> would be a user object that contains a contact object which contains a
>> location, etc.., stored in the session after authentication.  Lazy
>> loading
>> can be very useful in situations like this, but the session cannot be
>> serialized to disk by the container (e.g. Tomcat).  This negates
>> clustering,
>> for one, thing, and is also a pain for development, as the context is
>> often
>> reloaded due to code changes.  Without the serialization support, the
>> developer must plow through the entire log on and resulting work-flow to
>> get
>> to the required web page again.
>>
>> Are there any technical or architectural issues around making the
>> enhanced
>> object serializable?  Has anyone else run into this problem?  Right now,
>> I've disabled lazy loading to allow the session to be serialized.
>>
>> Thanks,
>>
>> Mike
>> --
>> View this message in context:
>> http://old.nabble.com/Ibatis-3---Lazy-Loading-and-Serializable-Sessions-tp28442042p28442042.html
>> Sent from the iBATIS - User - Java mailing list archive at Nabble.com.
>>
>>
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>>
> 
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> 
> 

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