Maven Package Compilation Error

Question

i created a webapp project using maven in eclipse. when i run the command mvn package in command prompt it showing folowing error.

[ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK? [INFO] 1 error [INFO] ------------------------------------------------------------- [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 4.310s [INFO] Finished at: Tue Mar 05 14:32:23 IST 2013 [INFO] Final Memory: 16M/218M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.0:compile (default-compile) on project  Compilation fa ilure [ERROR] ***No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?*** [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException 

i tried to change jdk and jre. but not working. still it shows same error

Answer 1

In Windows 7 - 64 bit, there is a permissions problem which prevents the installer from unpacking the file C:\Program Files\Java\jdk1.6.xx\lib\tools.jar into your local. This jar file is what maven-compiler-plugin version 3.x uses instead of the usual javac

Solution: Run, as an administrator, the Java JDK installer! And make sure the tools.jar is sitting in the C:\Program Files\Java\jdk1.6.xx\lib\

In case you are using m2e maven integration plugin, you want to see the file is visible to Eclipse via the following steps inside Eclipse:

• Go to Window -> Preferences -> Java -> installed JREs
• Select the JDK you are using (C:\Program Files\Java\jdk1.6.xx)
• Press Edit to see the list of jars including tools.jar, OW you can add it as Add External JAR

Then configure the maven run through these steps:

• Run->Run configurations->Fill in Name, Base directory and Goals.
• Then in the same window move to the JRE tab and point to the JDK \jdk1.6.xx\

Answer 2

Go to your 'Runtime Configuration' and configure your JRE to an JDK.

Or as @PawanKumarBaranwal suggested, set your default JDK. But care if you have more than one JRE configured.