javamavenrelease

maven compiler error with javac at release:prepare

i am having this issue. I saw many posts like this but i still can't solve this problem. This error appears when i put mvn release:prepare at the shell

[INFO] [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3:compile (default-compile) on project birthday-greeting-card-sender: Compilation failure
[INFO] [ERROR] Unable to locate the Javac Compiler in:
[INFO] [ERROR] /usr/lib/jvm/java-6-openjdk-amd64/jre/../lib/tools.jar
[INFO] [ERROR] Please ensure you are using JDK 1.4 or above and
[INFO] [ERROR] not a JRE (the com.sun.tools.javac.Main class is required).
[INFO] [ERROR] In most cases you can change the location of your Java
[INFO] [ERROR] installation by setting the JAVA_HOME environment variable.
[INFO] [ERROR] -> [Help 1]
[INFO] [ERROR] 
[INFO] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[INFO] [ERROR] Re-run Maven using the -X switch to enable full debug logging.
[INFO] [ERROR] 
[INFO] [ERROR] For more information about the errors and possible solutions, please read the following articles:
[INFO] [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

I have set JDK at /usr/lib/jvm/java-7-openjdk-amd64 (Preferences-->Java-->Installed JRE). I also add this line into eclipse.ini, but it couldn't work either:

-vm /usr/lib/jvm/java-7-openjdk-amd64

Does anybody have an idea about what is going on?

Solution

  • Since you also have this problem while running mvn in the shell, this is not related to eclipse, so setting:

    -vm /usr/lib/jvm/java-7-openjdk-amd64

    won't have any effect.

    This is also unrelated to the execution of goal release:prepare as the error occurs at compilation time. You can probably reproduce the same error by doing mvn compile.

    Your JAVA_HOME is probably pointing to /usr/lib/jvm/java-6-openjdk-amd64 (as seen in mvn log) while your jdk resides in /usr/lib/jvm/java-7-openjdk-amd64.

    To change JAVA_HOME and test the new setting, go in a shell and:

    export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
mvn compile

    If it works you can add export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64 to your ~/.bashrc file so that it gets set everytime.