That is a very good question Michel. If you have both jdk's installed, and
both java compat's installed, which java does it choose.
Well, the answer is "both"
They only have to point to one java, because there only is one java, javac, etc...
If you do a comparison of jdk-1.6 i586 versus x86_64, the majority of files are
the same file. There is some files that are only in the i586 (the java plugin
mostly) and there are some files that are only in x86_64 (some 64 bit
libraries), but all the main programs are the same.
java is /usr/java/jdk1.6.0_10/bin/java for 32 and 64 bit
javac is /usr/java/jdk1.6.0_10/bin/javac for 32 and 64 bit
and so forth.
It seems to work.
Let me know if there are cases where it doesn't work.
Thanks
Troy
Michel Jouvin wrote:
> Troy,
>
> AFAIK, the only difference between both versions is about JNI which allows
> to use non-Java libraries from a Java application. If you install the i586
> version, you can use 32-bit libraries, if you install x86_64 version, you
> can use 64-bit libraries. I am not convinced you can install both in fact
> (how Java will choose the one to use)... but I may be wrong.
>
> Cheers,
>
> Michel
>
> --On lundi 3 novembre 2008 14:57 -0600 Troy Dawson <[log in to unmask]> wrote:
>
>> OK, it should be working now.
>> On SL4 there is only i586 java, even on x86_64. This is because that is
>> what we started with, and it makes things simpler.
>> On SL5, we have both i586 and x86_64. This gives people more choices.
>> I have tried installing the java-1.6.0-sun-compat x86_64 and i586 on the
>> same x86_64 machine. They installed without any problem, except some odd
>> font errors when installing the 32 bit version.
>> But, without the 32 bit compat rpm installed, my browser didn't see the
>> java plugin, even though the i586 jdk was installed.
>> Troy
>>
>> Dr Andrew C Aitchison wrote:
>>> On Wed, 22 Oct 2008, Troy Dawson wrote:
>>>
>>>> Discussion Topic: Java - when will we upgrade to Java 1.6?
>>>> Conclusion: Many scientific programs really need us to update to java
>>>> 1.6, the biggest name is dCache.
>>>> We will put the latest java 1.6 into testing and let people test it for
>>>> a month. If we don't have any show stoppers, we will push it out on
>>>> December 1, 2008
>>> Executive Summary:
>>> yum --enablerepo=sl-testing install java-1.6.0-sun-compat
>>> Error: Missing Dependency: jdk = 2000:1.5.0_16-fcs is needed by package
>>> java-1.5.0-sun-compat
>>>
>>> ---
>>> Suplementary question:
>>> We had
>>> java-1.5.0-sun-compat-1.5.0.16-1jpp.noarch.rpm
>>> which has been replaced by
>>> java-1.6.0-sun-compat-1.6.0.10-1.sl5.jpp.i586.rpm
>>> java-1.6.0-sun-compat-1.6.0.10-1.sl5.jpp.x86_64.rpm
>>>
>>> How do I choose which to install on an x86_64 machine ?
>>> ---
>>>
>>> -- More info about tbhe main problem:
>>>
>>> java-1.6.0-sun-compat-1.6.0.10-1.sl5.jpp.x86_64.rpm
>>> "replaces" jdk-1.6.0_10-fcs.x86_64.rpm but jdk-1.50...
>>> is needed by java-1.5.0-sun-compat-1.5.0.16-1.1.sl5.jpp.noarch.rpm
>>> which isn't (and since it is a -compat package maybe shouldn't be)
>>> "obsoleted" by java-1.6.0-sun-compat-1.6.0.10-1.sl5.jpp.*.rpm
>>>
>>> yum --enablerepo=sl-testing install java-1.6.0-sun-compat
>>> Loading "tsflags" plugin
>>> Loading "fastestmirror" plugin
>>> Loading "skip-broken" plugin
>>> Loading "priorities" plugin
>>> Loading "protectbase" plugin
>>> Loading "kmdl" plugin
>>> Loading "allowdowngrade" plugin
>>> Loading "fedorakmod" plugin
>>> Loading "changelog" plugin
>>> Loading "downloadonly" plugin
>>> Loading "kernel-module" plugin
>>> Loading mirror speeds from cached hostfile
>>> * dpmms-sl5:
>>> * sl-security: ftp.scientificlinux.org
>>> * sl-base: ftp.scientificlinux.org
>>> * dpmms-sl52-all:
>>> * sl-testing: ftp.scientificlinux.org
>>> 3786 packages excluded due to repository priority protections
>>> 0 packages excluded due to repository protections
>>> Setting up Install Process
>>> Parsing package install arguments
>>> Resolving Dependencies
>>> --> Running transaction check
>>> ---> Package java-1.6.0-sun-compat.i586 0:1.6.0.10-1.sl5.jpp set to be
>>> updated --> Processing Dependency: jdk = 2000:1.6.0_10-fcs for package:
>>> java-1.6.0-sun-compat ---> Package java-1.6.0-sun-compat.x86_64
>>> 0:1.6.0.10-1.sl5.jpp set to be updated --> Running transaction check
>>> --> Processing Dependency: jdk = 2000:1.5.0_16-fcs for package:
>>> java-1.5.0-sun-compat ---> Package jdk.x86_64 2000:1.6.0_10-fcs set to
>>> be updated
>>> ---> Package jdk.i586 2000:1.6.0_10-fcs set to be updated
>>> --> Processing Dependency: jdk = 2000:1.5.0_16-fcs for package:
>>> java-1.5.0-sun-compat --> Finished Dependency Resolution
>>> Beginning Kernel Module Plugin
>>> Finished Kernel Module Plugin
>>> Error: Missing Dependency: jdk = 2000:1.5.0_16-fcs is needed by package
>>> java-1.5.0-sun-compat
>>>
>>>
>>> [ I'm adding these packages to my repo rather than using testing
>>> directly building a
>>>
--
__________________________________________________
Troy Dawson [log in to unmask] (630)840-6468
Fermilab ComputingDivision/LCSI/CSI DSS Group
__________________________________________________
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