how to build with java -8 in epel-6?

[Farkas Levente]

hi,
i'm try to build a java package for epel-6 which use java-8.
unfortunately it seem it's not enough to simple add
BuildRequires:  java-1.8.0-openjdk-devel
since it's install it, but also still install during the mock setup
session old java packages ie:
java-1.5.0-gcj                 x86_64 1.5.0.0-29.1.el6         os
 137 k
java-1.6.0-sun                 x86_64 1:1.6.0.45-1jpp.1.el6    os
  25 M
java-1.7.0-ibm                 x86_64 1:1.7.0.5.0-1jpp.2.el6_4 os
  73 M
java-1.7.0-ibm-devel           x86_64 1:1.7.0.5.0-1jpp.2.el6_4 os
 7.5 M
java-1.7.0-oracle              x86_64 1:1.7.0.45-1jpp.2.el6_4  os
  28 M
and i'm not bale to exclude them. in rpm the is a Obsoletes: but there
is no such thing as "BuildRequiresObsoletes":-(

what's more i can't run system-switch-java since it's required root
access and there is no command line option to switch to a given specific
java version.

so during build the system use the default javac which is not java8 but
ibm's java7 (IBM J9 VM (build 2.6, JRE 1.7.0).

is there any way to force java8? or is there any way to exclude other
java vm jre to install into mock during build?

thanks in advance.
regards.


-- 
  Levente                               "Si vis pacem para bellum!"

[Deepak Bhole]

* Farkas Levente <lfarkas(a)lfarkas.org&gt; [2015-03-27 10:05]:
>  hi,
>  i'm try to build a java package for epel-6 which use java-8.
>  unfortunately it seem it's not enough to simple add
>  BuildRequires:  java-1.8.0-openjdk-devel
>  since it's install it, but also still install during the mock setup
>  session old java packages ie:
>  java-1.5.0-gcj                 x86_64 1.5.0.0-29.1.el6         os
>   137 k
>  java-1.6.0-sun                 x86_64 1:1.6.0.45-1jpp.1.el6    os
>    25 M
>  java-1.7.0-ibm                 x86_64 1:1.7.0.5.0-1jpp.2.el6_4 os
>    73 M
>  java-1.7.0-ibm-devel           x86_64 1:1.7.0.5.0-1jpp.2.el6_4 os
>   7.5 M
>  java-1.7.0-oracle              x86_64 1:1.7.0.45-1jpp.2.el6_4  os
>    28 M
>  and i'm not bale to exclude them. in rpm the is a Obsoletes: but there
>  is no such thing as "BuildRequiresObsoletes":-(
>  
>  what's more i can't run system-switch-java since it's required root
>  access and there is no command line option to switch to a given specific
>  java version.
>  
>  so during build the system use the default javac which is not java8 but
>  ibm's java7 (IBM J9 VM (build 2.6, JRE 1.7.0).
>  
>  is there any way to force java8? or is there any way to exclude other
>  java vm jre to install into mock during build?
>   
Hi,

One of your dependencies likely requires java or java-devel, or perhaps
even a versioned 6/7, which is why this seems to be happening. 

That said though, how are sun/oracle/ibm jdks showing up? They are not
in base rhel and AFAIK EPEL does not pull from Supplementary, does it?

You can force your build to use a different JVM in a couple of ways:

1. If you are calling javac directly, use
/usr/lib/jvm/java-1.8.0-openjdk/bin/javac

2. If there is additional complexity in the build e.g. ant/maven are
   being used, try setting JAVA_HOME and overriding PATH to put OpenJDK8
   first i.e. do:
   $ export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk
   $ export PATH=$JAVA_HOME/bin:${PATH}


This should force the usage of OpenJDK8.

Cheers,
Deepak

>  thanks in advance.
>  regards.
>  
>  
>  -- 
>    Levente                               "Si vis pacem para bellum!"
>  --
>  java-devel mailing list
>  java-devel(a)lists.fedoraproject.org
>  https://admin.fedoraproject.org/mailman/listinfo/java-devel

[Farkas Levente]

On 03/27/2015 03:38 PM, Deepak Bhole wrote:
>  * Farkas Levente <lfarkas(a)lfarkas.org&gt; [2015-03-27 10:05]:
> > hi,
> > i'm try to build a java package for epel-6 which use java-8.
> > unfortunately it seem it's not enough to simple add
> > BuildRequires:  java-1.8.0-openjdk-devel
> > since it's install it, but also still install during the mock setup
> > session old java packages ie:
> > java-1.5.0-gcj                 x86_64 1.5.0.0-29.1.el6         os
> >  137 k
> > java-1.6.0-sun                 x86_64 1:1.6.0.45-1jpp.1.el6    os
> >   25 M
> > java-1.7.0-ibm                 x86_64 1:1.7.0.5.0-1jpp.2.el6_4 os
> >   73 M
> > java-1.7.0-ibm-devel           x86_64 1:1.7.0.5.0-1jpp.2.el6_4 os
> >  7.5 M
> > java-1.7.0-oracle              x86_64 1:1.7.0.45-1jpp.2.el6_4  os
> >   28 M
> > and i'm not bale to exclude them. in rpm the is a Obsoletes: but there
> > is no such thing as "BuildRequiresObsoletes":-(
> >
> > what's more i can't run system-switch-java since it's required root
> > access and there is no command line option to switch to a given specific
> > java version.
> >
> > so during build the system use the default javac which is not java8 but
> > ibm's java7 (IBM J9 VM (build 2.6, JRE 1.7.0).
> >
> > is there any way to force java8? or is there any way to exclude other
> > java vm jre to install into mock during build?
> >
>  
>  Hi,
>  
>  One of your dependencies likely requires java or java-devel, or perhaps
>  even a versioned 6/7, which is why this seems to be happening. 
>  
>  That said though, how are sun/oracle/ibm jdks showing up? They are not
>  in base rhel and AFAIK EPEL does not pull from Supplementary, does it?
>  
>  You can force your build to use a different JVM in a couple of ways:
>  
>  1. If you are calling javac directly, use
>  /usr/lib/jvm/java-1.8.0-openjdk/bin/javac
>  
>  2. If there is additional complexity in the build e.g. ant/maven are
>     being used, try setting JAVA_HOME and overriding PATH to put OpenJDK8
>     first i.e. do:
>     $ export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk
>     $ export PATH=$JAVA_HOME/bin:${PATH}
>  
>  
>  This should force the usage of OpenJDK8. 
the real problem here is that java-1.8.0-openjdk do NOT provides java!
so all other packages which requires java try to install older version,
but since it's install java-1.8.0-openjdk it can't install
java-1.7.0-openjdk.
and this itself cause a lot's of other problems:

- first of all older jdk will be installed (sun, ibm, oracle) and if it
can't find any other version then the build failed.

- the system default java never will be java-1.8.0-openjdk so all tools
will be use a different java.

- even if i set in the spec file:
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk
export PATH=$JAVA_HOME/bin:${PATH}
ant clean
Error: Could not find or load main class
org.apache.tools.ant.launch.Launcher
the reason probably the same as in:
https://bugzilla.redhat.com/show_bug.cgi?id=983394
https://bugzilla.redhat.com/show_bug.cgi?id=982683
but jpackage-utils not updated on epel-6 and epel-7 (javapackages-tools)

so currently it's not possible.
anyway i fill a bug about it:
https://bugzilla.redhat.com/show_bug.cgi?id=1208832

-- 
  Levente                               "Si vis pacem para bellum!"

[Mikolaj Izdebski]

On 04/03/2015 01:01 PM, Farkas Levente wrote:
>  the real problem here is that java-1.8.0-openjdk do NOT provides
> java!
>  so all other packages which requires java try to install older version,
>  but since it's install java-1.8.0-openjdk it can't install
>  java-1.7.0-openjdk.
>  and this itself cause a lot's of other problems:
>  
>  - first of all older jdk will be installed (sun, ibm, oracle) and if it
>  can't find any other version then the build failed. 
RHEL packages are built and tested with default Java version and that's
why they require it. Running them with OpenJDK8 was not tested and may
not work.

>  - the system default java never will be java-1.8.0-openjdk so all
> tools
>  will be use a different java. 
You can configure default system JDK/JRE version in /etc/java/java.conf
file. You can set JAVA_HOME to OpenJDK8 home if you want.

>  - even if i set in the spec file:
>  export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk
>  export PATH=$JAVA_HOME/bin:${PATH}
>  ant clean
>  Error: Could not find or load main class
>  org.apache.tools.ant.launch.Launcher
>  the reason probably the same as in:
>  https://bugzilla.redhat.com/show_bug.cgi?id=983394
>  https://bugzilla.redhat.com/show_bug.cgi?id=982683
>  but jpackage-utils not updated on epel-6 and epel-7 (javapackages-tools) 
Known problem. Will be fixed in RHEL 6.7. RHEL 7 is not affected AFAIK
(if it is then please file a bug).

-- 
Mikolaj Izdebski
Software Engineer, Red Hat
IRC: mizdebsk

[Farkas Levente]

On 04/03/2015 01:17 PM, Mikolaj Izdebski wrote:
> > - the system default java never will be java-1.8.0-openjdk so all
> tools
> > will be use a different java.
>  
>  You can configure default system JDK/JRE version in /etc/java/java.conf
>  file. You can set JAVA_HOME to OpenJDK8 home if you want. 
but during the build you can't modify /etc/java/java.conf.

>  Known problem. Will be fixed in RHEL 6.7. RHEL 7 is not affected
> AFAIK
>  (if it is then please file a bug). 
so currently it's not possible to build anything in epel-6 with java-8:-(

-- 
  Levente                               "Si vis pacem para bellum!"

[Mikolaj Izdebski]

On 04/03/2015 01:31 PM, Farkas Levente wrote:
>  On 04/03/2015 01:17 PM, Mikolaj Izdebski wrote:
> >> - the system default java never will be java-1.8.0-openjdk so all tools
> >> will be use a different java.
> >
> > You can configure default system JDK/JRE version in /etc/java/java.conf
> > file. You can set JAVA_HOME to OpenJDK8 home if you want.
>  
>  but during the build you can't modify /etc/java/java.conf. 
There are other ways of setting JDK to be used, which don't require root
access.

1. user-specific config file: $HOME/.java/java.conf
2. app-specific config files (in case of ant these are
$HOME/.ant/ant.conf and $HOME/.antrc)
3. environmental variable JAVA_HOME (as explained by Deepak)

> > Known problem. Will be fixed in RHEL 6.7. RHEL 7 is not affected
> AFAIK
> > (if it is then please file a bug).
>  
>  so currently it's not possible to build anything in epel-6 with java-8:-( 
It is possible, but you'd need to use some workaround for bug 1149605.

-- 
Mikolaj Izdebski
Software Engineer, Red Hat
IRC: mizdebsk