[Building Sakai] Wicket related JVM death on Java 1.6

[Steve Swinsburg]

Hi David,

That class is a part of the Serialization that Wicket handles. Can you send me the crash log and I'll follow it up on the Wicket lists.

Do you mean this version of the SCORM player?
https://svn.edia.nl/edia-sakai/edia-sakai-scorm/branches/2.5.3/

Unfortunately it uses a very old version of Wicket, wrapped inside Sakai Wicket, which is an old version of the 1.3 series, possibly even 1.3.0. This old version is most likely the cause.

If possible, you could try to upgrade the Wicket version that Sakai Wicket uses to 1.3.7, which is the latest (and last) in the 1.3 series.  It should be fully compatible. Wicket is on the 1.4 branch now (almost 1.4.6 in fact), but its an API change and introduces generics. Ideally, Sakai Wicket should be upgraded, tagged for Wicket 1.3.7 so older tools can use it, then deprecated. I've extracted the components it provides into separate parts which means no dependency on Sakai Wicket at all, and easy upgrades when new Wicket versions are released.

cheers,
Steve



On 11/01/2010, at 6:37 PM, David Horwitz wrote:

> Hi All,
> 
> We hit this worrying error that our production environment. It seems
> that at least some tool that use wicket via the Sakai-wicket library can
> lead to JVM death when running under java 1.6, the same tool runs fine
> under java 1.5. We saw this with the edia branch of the UC Davis scrorm
> tool. The crash report references a wicket call:
> 
> 2010-01-09 18:54:27,539 INFO http-8443-Processor23
> org.sakaiproject.tool.su.SuTool - [SuTool] Username dhorwitz becoming
> 00011398
> #
> # A fatal error has been detected by the Java Runtime Environment:
> #
> # SIGSEGV (0xb) at pc=0x00002aaaab5fa7fb, pid=21669, tid=1218128192
> #
> # JRE version: 6.0_17-b04
> # Java VM: Java HotSpot(TM) 64-Bit Server VM (14.3-b01 mixed mode
> linux-amd64 )
> # Problematic frame:
> # J
> org.apache.wicket.util.io.WicketObjectOutputStream.writeObjectOverride(Ljava/lang/Object;)V
> 
> #
> # An error report file with more information is saved as:
> # /usr/local/sakai/logs/hs_err_pid21669.log
> #
> # If you would like to submit a bug report, please visit:
> # http://java.sun.com/webapps/bugreport/crash.jsp
> 
> Any ideas/advise/fixes appreciated.
> 
> 
> Regards
> 
> David
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