jdk1.4.2 p5 problem

[Panagiotis Astithas]

On Tuesday 23 December 2003 19:02, Jesse Guardiani wrote:
> Panagiotis Astithas wrote:
> > On Tuesday 23 December 2003 18:17, Jesse Guardiani wrote:
> >> Panagiotis Astithas wrote:
> >> > On Tuesday 23 December 2003 17:12, Jesse Guardiani wrote:
> >> >> Marc van Kempen wrote:
> >> >> > Jesse Guardiani wrote:
> >> >> >> Howdy list,
> >> >> >>
> >> >> >> With jdk1.4.1 p4 I could load this web page's left frame java
> >> >> >> applet:
> >> >> >>
> >> >> >> http://www.billmax.com/docs20/web/index.htm
> >> >> >>
> >> >> >> Now, all I get is a red X. Any attempt to open the Java Console or
> >> >> >> About Java by right clicking results in a crash of the browser.
> >> >> >> Any ideas? I can provide the crash output if needed.
> >> >> >>
> >> >> >> Again, this worked great with my old 1.4.1 patchlevel 4 jdk.
> >> >> >>
> >> >> >> uname -a:
> >> >> >>
> >> >> >> FreeBSD trevarthan.int.wingnet.net 5.2-RC1 FreeBSD 5.2-RC1 #0: Sun
> >> >> >> Dec 7 22:15:14 GMT 2003
> >> >> >> root at wv1u.btc.adaptec.com:/usr/obj/usr/src/sys/GENERIC  i386
> >> >> >>
> >> >> >>>From mozilla's About Plugins:
> >> >> >>
> >> >> >> Java(TM) Plug-in 1.4.2-p5-jesse_17_dec_2003_01_33
> >> >> >>
> >> >> >> Thanks!
> >> >> >
> >> >> > Works just fine for me on 4.9-RC, with jdk1.4.1p5.
> >> >>
> >> >> Yeah. It worked fine for me too with 1.4.1. Can anyone test and
> >> >> confirm this same problem with 1.4.2p5?
> >> >
> >> > It works for me in Mozilla 1.5, jdk 1.4.2, 5.1-current of
> >> > October-something.
> >>
> >> What patch level?
> >
> > There is only 1.4.2p5 AFAIK.
> >
> >> > It crashed at first, but then I spotted a leftover
> >> > plugin library from jdk 1.3.1. After I removed it, everything worked
> >> > as expected.
> >>
> >> How did you spot it? I don't even know how to get debug info out of this
> >> applet as I can't open the java console without a crash:
> >
> > "about plugins" showed both versions.
>
> OK. Only 1.4.2p5 listed there for me.
>
> >> An unexpected exception has been detected in native code outside the VM.
> >> Unexpected Signal : 11 occurred at PC=0x3481F7C7
> >> Function=processTree+0x29B
> >> Library=/usr/local/jdk1.4.2/jre/lib/i386/libawt.so
> >>
> >> Current Java thread:
> >>         at sun.awt.motif.MToolkit.run(Native Method)
> >>         at java.lang.Thread.run(Thread.java:534)
> >>
> >> Dynamic libraries:
> >> 0x8048000       java_vm
> >> 0x28075000      /usr/lib/libc_r.so.5
> >
> > One difference is that I use libkse (with libmap).
>
> What does your libmap.conf look like? I put this in mine:
>
> # /etc/libmap.conf
> #
> # candidate             mapping
> #
> libc_r.so.5             libthr.so.1     # Everything uses 'libthr'
> libc_r.so               libthr.so
>
> [/usr/local/jdk1.4.2/]                # 'jdk1.4.2' uses libkse.
> libc_r.so.5             libkse.so.1
> libc_r.so               libkse.so
>
>
> And now my java console works, but the applet still doesn't work. Here is
> what the console prints:
>
> Java(TM) Plug-in: Version 1.4.2
> Using JRE version 1.4.2-p5 Java HotSpot(TM) Client VM
> User home directory = /home/jesse
> Proxy Configuration: Browser Proxy Configuration
>
>
> ----------------------------------------------------
> c:   clear console window
> f:   finalize objects on finalization queue
> g:   garbage collect
> h:   display this help message
> l:   dump classloader list
> m:   print memory usage
> o:   trigger logging
> p:   reload proxy configuration
> q:   hide console
> r:   reload policy configuration
> s:   dump system properties
> t:   dump thread list
> v:   dump thread stack
> x:   clear classloader cache
> 0-5: set trace level to <n>
> ----------------------------------------------------
> load: class WebHelp.class not found.
> java.lang.ClassNotFoundException: WebHelp.class
>         at
> sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:162) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:289)
>         at
> sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:123) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:235)
>         at
> sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:566) at
> sun.applet.AppletPanel.createApplet(AppletPanel.java:617) at
> sun.plugin.AppletViewer.createApplet(AppletViewer.java:1848) at
> sun.applet.AppletPanel.runLoader(AppletPanel.java:546)
>         at sun.applet.AppletPanel.run(AppletPanel.java:298)
>         at java.lang.Thread.run(Thread.java:534)
> Caused by: java.net.SocketException: IPv4 mapped addresses usage is turned
> off.  Set net.inet6.ip6.v6only=0 or use '-Djava.net.preferIPv4Stack=true'
> to disable java IPv6 support at
> java.net.PlainSocketImpl.socketConnect(Native Method)
>         at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
>         at
> java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171) at
> java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158) at
> java.net.Socket.connect(Socket.java:452)
>         at sun.net.NetworkClient.doConnect(NetworkClient.java:137)
>         at
> sun.plugin.net.protocol.http.HttpClient.doConnect(HttpClient.java:106) at
> sun.net.www.http.HttpClient.openServer(HttpClient.java:402) at
> sun.net.www.http.HttpClient.openServer(HttpClient.java:618) at
> sun.net.www.http.HttpClient.<init>(HttpClient.java:306) at
> sun.net.www.http.HttpClient.<init>(HttpClient.java:267) at
> sun.plugin.net.protocol.http.HttpClient.<init>(HttpClient.java:41) at
> sun.plugin.net.protocol.http.HttpClient.New(HttpClient.java:62) at
> sun.plugin.net.protocol.http.HttpURLConnection.createConnection(HttpURLConn
>ection.java:101) at
> sun.plugin.net.protocol.http.HttpURLConnection.connect(HttpURLConnection.ja
>va:158) at
> sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(HttpURLConnec
>tion.java:393) at
> java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:272) at
> sun.applet.AppletClassLoader.getBytes(AppletClassLoader.java:263) at
> sun.applet.AppletClassLoader.access$100(AppletClassLoader.java:43) at
> sun.applet.AppletClassLoader$1.run(AppletClassLoader.java:152) at
> java.security.AccessController.doPrivileged(Native Method) at
> sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:149) ... 9
> more
>
> It's been a while since I wrote java code so I'm not sure if the above
> backtrace was caused by something the console tried to load, or the applet
> itself?

I believe you are on the right track. Just do as the message says:
sysctl net.inet6.ip6.v6only=0
-- 
Panagiotis Astithas
Electrical & Computer Engineer, PhD
Network Management Center
National Technical University of Athens, Greece