Maven error :Perhaps you are running on a JRE rather than a JDK?
I've never worked with Maven before and I am following the instructions here. When I run the command
mvn integration-test -Pamp-to-war
It initially downloaded a whole bunch of dependencies, and in the end it showed,
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
I am on ubuntu 13.04.
If there's anything you want me to tell you, let me know. Thanks.
EDIT
When I do echo $JAVA_HOME I get /usr/lib/jvm/java-7-openjdk-i386/
When I do mvn -version
I get,
Apache Maven 3.0.4
Maven home: /usr/share/maven
Java version: 1.7.0_25, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-7-openjdk-i386/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.8.0-26-generic", arch: "i386", family: "unix"
Also, I found out this problem faced by someone else. But I am not sure how to go about the solution that is specified?
Further edits.
kraken@kraken-Inspiron-1545:/usr/lib/jvm/java-7-openjdk-i386$ ls -l
total 12
drwxr-xr-x 2 root root 4096 Sep 9 10:44 bin
lrwxrwxrwx 1 root root 41 Jul 4 2013 docs -> ../../../share/doc/openjdk-7-jre- headless
drwxr-xr-x 5 root root 4096 Oct 13 2013 jre
drwxr-xr-x 4 root root 4096 Oct 13 2013 man
Answer
I've been facing the same issue with java 8 (ubuntu 16.04), trying to compile using mvn command line.
I verified my $JAVA_HOME, java -version and mvn -version. Everything seems to be okay pointing to /usr/lib/jvm/java-8-openjdk-amd64.
It appears that java-8-openjdk-amd64 is not completly installed by default and only contains the JRE (despite its name "jdk").
Re-installing the JDK did the trick.
sudo apt-get install openjdk-8-jdk
Then some new files and new folders are added to /usr/lib/jvm/java-8-openjdk-amd64 and mvn is able to compile again.