[jbosstools-issues] [JBoss JIRA] (JBIDE-22879) JavaEE jars files are built with another java version than used for compilation

[Rob Stryker (JIRA)]

    [ https://issues.jboss.org/browse/JBIDE-22879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13290195#comment-13290195 ] 

Rob Stryker commented on JBIDE-22879:
-------------------------------------

Unfortunately, this will remain targeted to later, since it is an upstream bug. Please see the linked bugzilla if you wish to provide further input there. 

It's worth noting, however, that this bug is almost entirely cosmetic. We recognize that people may depend on the manifest flag for debugging purposes, however, exporting and publishing of projects is generally not intended for production purposes. These are development tools, meant to speed up rapid development and testing on various application servers. 

For real deployments, it's suggested to use your actual maven build for repeatable and accurate results. 

> JavaEE jars files are built with another java version than used for compilation
> -------------------------------------------------------------------------------
>
>                 Key: JBIDE-22879
>                 URL: https://issues.jboss.org/browse/JBIDE-22879
>             Project: Tools (JBoss Tools)
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 4.2.3.Final, 4.4.0.Final
>         Environment: I've observed this problem on a Win7 64 bit machine with Oracle JRE 1.8.0_102 64 bit. It was present in both JBoss Developer Studio 8.1.0.GA and 10.0.0.GA when used in conjunction with embedded Maven installation and JBoss EAP 6.4 target runtime.
>            Reporter: Mikhail Kalkov
>            Assignee: Rob Stryker
>             Fix For: LATER
>
>         Attachments: test-projects.zip
>
>
> I have installed system-wide JRE 8 in order to run all java applications with it. At the same time, out target platform is still based on Java 7 and that's why I've also downloaded JDK 7 and set JAVA_HOME path to it.
> When I build test-ejb project from attached zip file on command line, maven both compiles and packages it with JDK 7 obtained from JAVA_HOME. When I build the same project with JBoss Developer Studio which was configured via Window > Preferences > Java > Installed JREs to use JDK 7 by default, class files get version 51 (java 7) but Build-Jdk stanza in MANIFEST.MF is set to 1.8.0_102 instead of 1.7. I've also observed that test-ear project is also packaged with Java 8 instead of Java 7.
> This is not a big issue but is a bit worrying since for example jar tool from JDK 8 may contains bugfixes not present in JDK 7. This also makes me think that other tools may be fetched from wrong JDK version. Finally, I'm not even sure whether this is a JBoss Tools, Eclipse WTP or Eclipse M2E issue but it is clearly present in the latest stock version of JBoss Developer Studio.



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