[CentOS] java annoyances

[m.roth at 5-cent.us]

Ljubomir Ljubojevic wrote:
> m.roth at 5-cent.us wrote:
>> Fresh install on a brand new box (Dell Precision 3500) of 5.6. I install
>> Sun java-1.6.0_26-b03, Java HotSpot(TM) 64-Bit Server VM (build
>> 20.1-b02,
>> mixed mode)
>>
>> Then
>> ln -s
>> /usr/lib/jvm/java-1.6.0-sun-1.6.0.26.x86_64/jre/lib/amd64/libnpjp2.so
>> /usr/lib64/mozilla/plugins
>>
>> about:plugins shows java enabled (oddly enough, I seem to have flash,
>> 32-bit, in the 32 bit libs, and that doesn't show; guess I need to
>> install
>> nspluginwrapper). I go to the java tester, as recommended on the CentOS
>> wiki, <http://javatester.org/version.html>, no pink rectangle, and if I
>> click on the enabled link, firefox crashes, with
>> firefox --no-remote -P
>> Exception in thread "main" java.lang.NoClassDefFoundError:
>> sun/plugin2/main/server/MozillaPlugin
>> Caused by: java.lang.ClassNotFoundException:
>> sun.plugin2.main.server.MozillaPlugin
>>         at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>>         at java.security.AccessController.doPrivileged(Native Method)
>>         at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>>         at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>>         at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>> Segmentation fault
>>
>> Anyone got any ideas what's wrong? Clues for the poor?
>>
> This what I use for java in Firefox:
>
<snip>
> For example, this is the output I get:
>
> java version "1.6.0_16″
> Java(TM) SE Runtime Environment (build 1.6.0_16-b01)
> Java HotSpot(TM) 64-Bit Server VM (build 14.2-b01, mixed mode)

Did that: java -version gives
java -version
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)
>
> Go to /usr/lib64/mozilla/plugins:
> cd /usr/lib64/mozilla/plugins
> ili
> cd /usr/lib/mozilla/plugins
>
> 4. Create a symbolic link to libnpjp2.so (Firefox plugin for Java):
> ln -s /usr/java/latest/jre/lib/amd64/libnpjp2.so
> ili
> ln -s /usr/java/latest/jre/lib/i386/libnpjp2.so
>
> Note: The above is applicable for JDK installation. For JRE it is likely
> to be:
> ln -s /usr/java/latest/lib/amd64/libnpjp2.so
> ili
> ln -s /usr/java/latest/lib/i386/libnpjp2.so
> 5. Restart Firefox and type the following in URL field and press Enter:
> about:plugins

Did all that, per the wiki instructions.
>
> You should now see a section titled Java(TM) Plug-in 1.6.x
>
> You are done installing Java Plugin / Applet support in Firefox on CentOS

Yup.

> 5.
>
> ln -s /usr/java/latest/plugin/i386/ns7/libjavaplugin_oji.so  u
> /usr/lib/mozilla/plugins
>
> please watch out for i386/x86_64 differences, and replace path where
> needed.

Ok, this used to be, for i386. At any rate, that's not in the Sun package,
as released via RHN.

       mark