Buildtoolkit/Build version for RTC Server 5.0.2 with JAVA_HOME=JDK1.5

Yes you've understood the issue correctly. The main problem is that the application that has to be built, has itself in the code a check condition for JDK1.5 because it has to be intregrated with Aqualogic BMP process. So javac 1.5 is mandatory.
In fact this build definition was used for years, but with RTC Server 4.0.1 and buildtoolkit 3.0.1.
Issue started after migrating @ RTC Server 5.0.2 / buildtoolkit 5.0.2.

I also came to the conclusion that the only solution could be force a 1.5 javac inside build.xml, but I' d like to avoid code changes.

Thanks a lot for your support!

If I understand the issue correctly, that is, you have set the "Java home" under the Ant Configuration in the build definition, then it is what you get (the exceptions are thrown by Ant).

So, we can set JBE to run with JRE 1.6 via -vm option on jbe.ini and set JAVA_HOME to JDK 1.5 location to be able to compile Java source codes at Java 5 level, which is not supported by Ant.

Also note that your JBE is run with JRE 1.6, whatever your JAVA_HOME says. It is likely inconsistent.

Hi Ralph,
thanks for your quick answer, unfortunately I am not able to solve my issue.

I downloaded a 32-bit JDK in plain zip RTC-Client-Linux-5.0.2.
After this I edited jbe.ini in \jazz\buildsystem\buildengine\eclipse as follow :
-vm
/app/bea/oag_cm/rtc.5.0.2/jazz/client/eclipse/java32/jdk/jre/bin
--launcher.suppressErrors
-vmargs
-Dosgi.requiredJavaVersion=1.6
-Dcom.ibm.team.filesystem.client.disable.fslistener=true

I started build engine 5.2 with 32-bit java executable :
jbe.sh -vm /app/bea/oag_cm/rtc.5.0.2/jazz/client/eclipse/java32/jdk/jre/bin/java -repository https://172.24.138.64:9443/ccm -userId build_oag -passwordFile /app/bea/oag_cm/BUILD_OAG/jazz/buildsystem/buildengine/eclipse/build_oaglegacy_pswd.txt -engineId oaglegacy.engine -verbose

Java Version:
JRE 1.6.0 IBM J9 2.4 Linux x86-32 jvmxi3260sr16-20140626_204542 (JIT enabled, AOT enabled)
J9VM - 20140626_204542
JIT  - r9_20130920_46510ifx7
GC   - GA24_Java6_SR16_20140626_1848_B204542

But my build definition that contains JAVA_HOME = /jdk150_11 still fails :

Detected Java version: 1.5 in: /beaoagj/jdk150_11/jre
Detected OS: Linux

BUILD FAILED
java.lang.UnsupportedClassVersionError: Bad version number in .class file
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
    at javax.xml.parsers.FactoryFinder.newInstance(FactoryFinder.java:88)
    at javax.xml.parsers.FactoryFinder.findJarServiceProvider(FactoryFinder.java:278)
    at javax.xml.parsers.FactoryFinder.find(FactoryFinder.java:185)
    at javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:107)
    at org.apache.tools.ant.util.JAXPUtils.newParserFactory(JAXPUtils.java:122)
    at org.apache.tools.ant.util.JAXPUtils.getNSParserFactory(JAXPUtils.java:106)
    at org.apache.tools.ant.util.JAXPUtils.getNamespaceXMLReader(JAXPUtils.java:174)
    at org.apache.tools.ant.helper.ProjectHelper2.parse(ProjectHelper2.java:245)
    at org.apache.tools.ant.helper.ProjectHelper2.parse(ProjectHelper2.java:178)
    at org.apache.tools.ant.ProjectHelper.configureProject(ProjectHelper.java:93)
    at org.apache.tools.ant.Main.runBuild(Main.java:829)
    at org.apache.tools.ant.Main.startAnt(Main.java:236)
    at org.apache.tools.ant.launch.Launcher.run(Launcher.java:285)
    at org.apache.tools.ant.launch.Launcher.main(Launcher.java:112)

Please note that all other build definition that have a JAVA_HOME > 1.5 with the same build engine completes successfuly.