Re: WARN: Cannot serialize session attribute JSONRPCBridge for session

[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
>