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JDK Error during Maven Build

asked 2014-06-28 11:54:13 -0700

Mierdin gravatar image

updated 2014-06-28 11:55:44 -0700

When performing a "mvn clean install" on essentially any maven-based Open Daylight project, I get the following error:

org.apache.maven.enforcer.rule.api.EnforcerRuleException: Detected JDK Version: 1.6.0-65 is not in the allowed range 1.7.0.

Of course, the Enforcer plugin is responsible for making sure this version is enforced, so naturally, we also get this error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:1.3.1:enforce (enforce-java) on project ovsdb_commons: Some Enforcer rules have failed. Look above for specific messages explaining why the rule failed.

As a result, the build fails. This is strange, considering that my JDK version is indeed 1.7:

~/C/ovsdb ??? java -version
java version "1.7.0_55"
Java(TM) SE Runtime Environment (build 1.7.0_55-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03, mixed mode)
~/C/ovsdb ??? ls  -l /Library/Java/JavaVirtualMachines
total 0
drwxr-xr-x  3 root  wheel  102 May  9 13:08 jdk1.7.0_55.jdk
~/C/ovsdb ???

Why would the Java version mismatch in this way?

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answered 2014-06-28 11:54:56 -0700

Mierdin gravatar image

This is probably because Maven is using JDK 1.6 by default. This is a popular problem on Mac OSX (but could theoretically also occur on other platforms):

~/C/ovsdb ??? mvn -v
Apache Maven 3.2.1 (ea8b2b07643dbb1b84b6d16e1f08391b666bc1e9; 2014-02-14T12:37:52-05:00)
Maven home: /usr/local/Cellar/maven/3.2.1/libexec
Java version: 1.6.0_65, vendor: Apple Inc.
Java home: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
Default locale: en_US, platform encoding: MacRoman
OS name: "mac os x", version: "10.9.3", arch: "x86_64", family: "mac"

To fix this, just add this line to your ~/.mavenrc file (create the file if it doesn't exist):

export JAVA_HOME=/Library/Java/JavaVirtualMachines/{jdk-version}/Contents/Home

This will allow Maven to use your installed JDK, without affecting other applications that use Java.

Happy hacking!

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Thanks, This worked for me.

ransari ( 2015-01-12 10:39:12 -0700 )edit
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Asked: 2014-06-28 11:54:13 -0700

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Last updated: Jun 28 '14