[jboss-jira] [JBoss JIRA] Commented: (JBRULES-596) When a rule project is set to use jdk5 in properties -> java compiler, it can cause "unsupportered major.minor version" error
[ http://jira.jboss.com/jira/browse/JBRULES-596?page=comments#action_12369915 ]
Kris Verlaenen commented on JBRULES-596:
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The unsupported major.minor version is probably caused by trying to execute java code with
an old jre that has been compiled with a newer jre (in this case trying to execute jdk5
code using a jdk1.4). When changing the jdk settings to a lower jdk version, you should
ALWAYS allow eclipse to do a FULL rebuild of your project. Otherwise it is possible that
code compiled using the newer jdk version cannot be run by the older jdk. This does not
seem to be a Drools-related problem. I am uncapable of reproducing the error when always
doing a full rebuild after downgrading the jdk version.
When a rule project is set to use jdk5 in properties -> java
compiler, it can cause "unsupportered major.minor version" error
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Key: JBRULES-596
URL: http://jira.jboss.com/jira/browse/JBRULES-596
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Documentation
Affects Versions: 3.0.5
Environment: windows XP, eclipse 3.2.1, jdk 1.5.0
Reporter: peter lin
Assigned To: Kris Verlaenen
Priority: Minor
Fix For: 4.0.0.GA
If a person's Eclipse is set to use jdk5 as the default, it can cause the plugin to
not work. The error in the problems summary in eclipse says "unsupported major.minor
version". The solution is to set the rule project to use jdk1.4.
right click on the project
select properties
select java compiler
change setting to jdk1.4
another potential workaround is to set eclipse to use jdk1.4 as the default.
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