Alternate JDK on slave box

[Gilles Devaux]

Hi,

I have installed two JDKs on a slave box, JDK7 (default) and JDK8 (without update-alternatives). I'm trying to build something with the JDK8 but no luck.

I'm setting "JAVA_HOME=/usr/lib/jvm/jdk-8-oracle-x64/" in several places, String build parameter, inject environment, something like this in the DSL:

```

wrappers {

                environmentVariables {

                    env('JAVA_HOME', '/usr/lib/jvm/jdk-8-oracle-x64/')

                }

            }

parameters {

                stringParam('JAVA_HOME','/usr/lib/jvm/jdk-8-oracle-x64/')

            }

environmentVariables(

                    JAVA_HOME: '/usr/lib/jvm/jdk-8-oracle-x64/'

            )

```

But maven is still started with the system JDK:

Relevant logs:

```

00:00:00.001 [EnvInject] - Loading node environment variables.

00:00:00.420 [EnvInject] - Preparing an environment for the build.

00:00:00.420 [EnvInject] - Keeping Jenkins system variables.

00:00:00.629 [EnvInject] - Keeping Jenkins build variables.

00:00:01.255 [EnvInject] - Injecting as environment variables the properties content 

00:00:01.255 JAVA_HOME=/usr/lib/jvm/jdk-8-oracle-x64/

00:00:01.256 

00:00:01.256 [EnvInject] - Variables injected successfully.

00:00:01.257 [EnvInject] - Injecting contributions.

00:00:01.258 Building remotely on linux-ba-awsuse1-jenkinsslave-a1 in workspace ...

00:00:03.357 Creating version: 0.8.0-111-24-2015-01-27-825bee6

00:00:03.361 [EnvInject] - Executing scripts and injecting environment variables after the SCM step.

00:00:03.570 [EnvInject] - Injecting as environment variables the properties content 

00:00:03.570 JAVA_HOME=/usr/lib/jvm/jdk-8-oracle-x64/

00:00:03.673 

00:00:03.674 [EnvInject] - Variables injected successfully.

00:00:05.865 Copied 1 artifact from " [8mha:AAAAoR+LCAAAAAAAAP9b85aBtbiIQSajNKU4P08vOT+vOD8nVc+jsiC1KCczL9svvyTVzHb1RttJBUeZGJg8GdhyUvPSSzJ8GJhLi3JKGIR8shLLEvVzEvPS9YNLijLz0q0rihik0IxzhtAgwxgggJGJgaGiAMjQLWFQ0c/KT9JPy8/JyS/XLS5NT08tLskE6tAty0wtjy9KBVH6AD2dlyipAAAA [0mfollow-suggestions-view_review (SCM Checkout)" build number [8mha:AAAApB+LCAAAAAAAAP9b85aBtbiIQSajNKU4P08vOT+vOD8nVc+jsiC1KCczL9svvyTVzHb1RttJBUeZGJg8GdhyUvPSSzJ8GJhLi3JKGIR8shLLEvVzEvPS9YNLijLz0q0rihik0IxzhtAgwxgggJGJgaGiAMhgKmFQ18/KT9JPy8/JyS/XLS5NT08tLskE6tAty0wtjy9KBVH6Rib6AAebm7CsAAAA [0m24

00:00:07.081 [workspace-24_2015-01-27_20-45-28] $ /bin/sh -xe /tmp/hudson6869963651105314926.sh

00:00:07.094 + [ -f workspace.tgz ]

00:00:07.094 + tar xzf workspace.tgz

00:00:07.125 + rm workspace.tgz

00:00:07.797 Parsing POMs

00:00:10.818 maven3-agent.jar already up to date

00:00:11.351 maven3-interceptor.jar already up to date

00:00:11.665 maven3-interceptor-commons.jar already up to date

00:00:11.869 [workspace-24_2015-01-27_20-45-28] $ java -cp /spotify/jenkins-agent/maven3-agent.jar:/spotify/jenkins-agent/tools/hudson.tasks.Maven_MavenInstallation/_usr_bin_mvn/boot/plexus-classworlds-2.4.jar org.jvnet.hudson.maven3.agent.Maven3Main /spotify/jenkins-agent/tools/hudson.tasks.Maven_MavenInstallation/_usr_bin_mvn /spotify/jenkins-agent/slave.jar /spotify/jenkins-agent/maven3-interceptor.jar /spotify/jenkins-agent/maven3-interceptor-commons.jar 44050

00:00:12.750 <===[JENKINS REMOTING CAPACITY]===>channel started

00:00:24.609 log4j:WARN No appenders could be found for logger (org.apache.commons.beanutils.converters.BooleanConverter).

00:00:24.610 log4j:WARN Please initialize the log4j system properly.

00:00:30.355 Executing Maven:  -B -f ... -X compile

00:00:33.063 Apache Maven 3.0.5 (r01de14724cdef164cd33c7c8c2fe155faf9602da; 2013-02-19 13:51:28+0000)

00:00:33.064 Maven home: /spotify/jenkins-agent/tools/hudson.tasks.Maven_MavenInstallation/_usr_bin_mvn

00:00:34.009 Java version: 1.7.0_60, vendor: Oracle Corporation

00:00:34.013 Java home: /usr/lib/jvm/jdk-7-oracle-x64/jre

00:00:34.014 Default locale: en_US, platform encoding: UTF-8

00:00:34.024 OS name: "linux", version: "3.13.0-24-generic", arch: "amd64", family: "unix"

```

The parameters and injectedEnvVars panels in the build show the JAVA_HOME

Any idea?

Thanks

--Gilles

[Les Mikesell]

On Tue, Jan 27, 2015 at 2:57 PM, Gilles Devaux <gilles...@gmail.com> wrote:
> Hi,
>
> I have installed two JDKs on a slave box, JDK7 (default) and JDK8 (without
> update-alternatives). I'm trying to build something with the JDK8 but no
> luck.
>
> I'm setting "JAVA_HOME=/usr/lib/jvm/jdk-8-oracle-x64/" in several places,
> String build parameter, inject environment, something like this in the DSL:
>
> ```
> wrappers {
> environmentVariables {
> env('JAVA_HOME', '/usr/lib/jvm/jdk-8-oracle-x64/')
> }
> }
> parameters {
> stringParam('JAVA_HOME','/usr/lib/jvm/jdk-8-oracle-x64/')
> }
> environmentVariables(
> JAVA_HOME: '/usr/lib/jvm/jdk-8-oracle-x64/'
> )
> ```

I'm not using maven, but doesn't this work like the other JVM
settings? That is, give the JVMs names in the global configuration,
then set/override the location in the node config tools section, and
then pick the JDK name in the job config. The location should get
exported as JAVA_HOME.

--
Les Mikesell
lesmi...@gmail.com

[John Mellor]

Its been a while since I did a maven build under Jenkins or Hudson, but somewhere it notes that the system jdk is used to fire up Java-based build steps. There should be a checkbox somewhere in the config to start a separate Java instance and NOT use the default system jdk. Of course, that will require forking and starting up the different jdk, so it will slow your build down slightly...

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