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Posted to user@jspwiki.apache.org by Weijian Fang <wf...@ecs.soton.ac.uk> on 2009/04/20 16:22:07 UTC

WARN: Cannot serialize session attribute JSONRPCBridge for session

Hi,

When my jspwiki is stopping, it gives out a lot of warning saying that
"Cannot serialize session attribute JSONRPCBridge for session ...".
Please see the log4j record below.

My questions are

1. why this warning? how to fix it?
2. How are JSON/AJAX used in JSPWiki? I am not aware they are used
anywhere in my jspwiki deployment.

Many thanks in advance!

<log4j:event logger="org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/]"
timestamp="1238674309712" level="WARN" thread="main">
<log4j:message><![CDATA[Cannot serialize session attribute
JSONRPCBridge for session
B8E4DAC41954373BCCF458668BFEDFCC]]></log4j:message>
<log4j:throwable><![CDATA[java.io.NotSerializableException:
com.ecyrd.jspwiki.search.SearchManager$JSONSearch
	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
	at java.util.HashMap.writeObject(HashMap.java:985)
	at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890)
	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333)
	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
	at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1478)
	at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:948)
	at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:517)
	at org.apache.catalina.session.StandardManager.unload(StandardManager.java:463)
	at org.apache.catalina.session.StandardManager.stop(StandardManager.java:667)
	at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4360)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
	at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
	at org.apache.catalina.core.StandardService.stop(StandardService.java:510)
	at org.apache.catalina.core.StandardServer.stop(StandardServer.java:734)
	at org.apache.catalina.startup.Catalina.stop(Catalina.java:602)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:577)
	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:585)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
]]></log4j:throwable>
</log4j:event>

Cheers,

Weijian

Re: WARN: Cannot serialize session attribute JSONRPCBridge for session

Posted by Harry Metske <ha...@gmail.com>.
http://mail-archives.apache.org/mod_mbox/incubator-jspwiki-user/200808.mbox/%3C3a6c97f00808120916p328692f4y33ab28c5a6e526f1@mail.gmail.com%3E



2009/4/20 Janne Jalkanen <ja...@iki.fi>

> The exception is harmless and you can ignore it.  You can configure
> your Tomcat not to report this exception (I think Harry had the
> details).
>
> JSPWiki uses AJAX quite heavily, e.g. check out the preview
> functionality while editing, or the search box.
>
> /Janne
>
> On Mon, Apr 20, 2009 at 03:22:07PM +0100, Weijian Fang wrote:
> > Hi,
> >
> > When my jspwiki is stopping, it gives out a lot of warning saying that
> > "Cannot serialize session attribute JSONRPCBridge for session ...".
> > Please see the log4j record below.
> >
> > My questions are
> >
> > 1. why this warning? how to fix it?
> > 2. How are JSON/AJAX used in JSPWiki? I am not aware they are used
> > anywhere in my jspwiki deployment.
> >
> > Many thanks in advance!
> >
> > <log4j:event
> logger="org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/]"
> > timestamp="1238674309712" level="WARN" thread="main">
> > <log4j:message><![CDATA[Cannot serialize session attribute
> > JSONRPCBridge for session
> > B8E4DAC41954373BCCF458668BFEDFCC]]></log4j:message>
> > <log4j:throwable><![CDATA[java.io.NotSerializableException:
> > com.ecyrd.jspwiki.search.SearchManager$JSONSearch
> >       at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
> >       at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
> >       at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
> >       at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
> >       at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
> >       at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
> >       at java.util.HashMap.writeObject(HashMap.java:985)
> >       at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
> >       at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >       at java.lang.reflect.Method.invoke(Method.java:585)
> >       at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890)
> >       at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333)
> >       at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
> >       at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
> >       at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
> >       at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
> >       at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
> >       at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
> >       at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
> >       at
> org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1478)
> >       at
> org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:948)
> >       at
> org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:517)
> >       at
> org.apache.catalina.session.StandardManager.unload(StandardManager.java:463)
> >       at
> org.apache.catalina.session.StandardManager.stop(StandardManager.java:667)
> >       at
> org.apache.catalina.core.StandardContext.stop(StandardContext.java:4360)
> >       at
> org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
> >       at
> org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
> >       at
> org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
> >       at
> org.apache.catalina.core.StandardService.stop(StandardService.java:510)
> >       at
> org.apache.catalina.core.StandardServer.stop(StandardServer.java:734)
> >       at org.apache.catalina.startup.Catalina.stop(Catalina.java:602)
> >       at org.apache.catalina.startup.Catalina.start(Catalina.java:577)
> >       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:585)
> >       at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
> >       at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
> > ]]></log4j:throwable>
> > </log4j:event>
> >
> > Cheers,
> >
> > Weijian
>

Re: WARN: Cannot serialize session attribute JSONRPCBridge for session

Posted by Janne Jalkanen <ja...@iki.fi>.
The exception is harmless and you can ignore it.  You can configure
your Tomcat not to report this exception (I think Harry had the
details).

JSPWiki uses AJAX quite heavily, e.g. check out the preview
functionality while editing, or the search box.

/Janne

On Mon, Apr 20, 2009 at 03:22:07PM +0100, Weijian Fang wrote:
> Hi,
> 
> When my jspwiki is stopping, it gives out a lot of warning saying that
> "Cannot serialize session attribute JSONRPCBridge for session ...".
> Please see the log4j record below.
> 
> My questions are
> 
> 1. why this warning? how to fix it?
> 2. How are JSON/AJAX used in JSPWiki? I am not aware they are used
> anywhere in my jspwiki deployment.
> 
> Many thanks in advance!
> 
> <log4j:event logger="org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/]"
> timestamp="1238674309712" level="WARN" thread="main">
> <log4j:message><![CDATA[Cannot serialize session attribute
> JSONRPCBridge for session
> B8E4DAC41954373BCCF458668BFEDFCC]]></log4j:message>
> <log4j:throwable><![CDATA[java.io.NotSerializableException:
> com.ecyrd.jspwiki.search.SearchManager$JSONSearch
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
> 	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
> 	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
> 	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
> 	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
> 	at java.util.HashMap.writeObject(HashMap.java:985)
> 	at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890)
> 	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333)
> 	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
> 	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
> 	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
> 	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
> 	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
> 	at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1478)
> 	at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:948)
> 	at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:517)
> 	at org.apache.catalina.session.StandardManager.unload(StandardManager.java:463)
> 	at org.apache.catalina.session.StandardManager.stop(StandardManager.java:667)
> 	at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4360)
> 	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
> 	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
> 	at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
> 	at org.apache.catalina.core.StandardService.stop(StandardService.java:510)
> 	at org.apache.catalina.core.StandardServer.stop(StandardServer.java:734)
> 	at org.apache.catalina.startup.Catalina.stop(Catalina.java:602)
> 	at org.apache.catalina.startup.Catalina.start(Catalina.java:577)
> 	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:585)
> 	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
> 	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
> ]]></log4j:throwable>
> </log4j:event>
> 
> Cheers,
> 
> Weijian