Bernd, Mark,
Here is the result of `mvn --version`:
Apache Maven 3.0.5
Maven home: /usr/share/maven
Java version: 1.7.0_65, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-7-openjdk-amd64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.13.0-43-generic", arch: "amd64", family: "unix"
This is the project structure:
ole@MKI:~/test2$ tree
.
├── pom.xml
└── src
└── test
└── java
└── hello
└── HelloUnitTest.java
4 directories, 2 files
Sequence:
- `mvn clean`
- Now the compilation error occurs.
- Import the project into eclipse
- Run the test. It runs fine.
- Try 'mvn test'
- Runs fine
- Run `mvn clean`
- Run `mvn test`
- Compilation error
Here's a dump of my terminal:
ole@MKI:~/test2$ mvn clean
Warning: JAVA_HOME environment variable is not set.
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building test-maven 1.0.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ test-maven ---
[INFO] Deleting /home/ole/test2/target
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.635s
[INFO] Finished at: Wed Dec 31 12:39:57 CST 2014
[INFO] Final Memory: 6M/240M
[INFO] ------------------------------------------------------------------------
ole@MKI:~/test2$ mvn test
Warning: JAVA_HOME environment variable is not set.
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building test-maven 1.0.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.3:resources (default-resources) @
test-maven ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources,
i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /home/ole/test2/src/main/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.2:compile (default-compile) @ test-maven ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-resources-plugin:2.3:testResources (default-testResources) @
test-maven ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources,
i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /home/ole/test2/src/test/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.2:testCompile (default-testCompile) @
test-maven ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e.
build is platform dependent!
[INFO] Compiling 1 source file to /home/ole/test2/target/test-classes
[INFO] -------------------------------------------------------------
[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: 1.958s
[INFO] Finished at: Wed Dec 31 12:40:06 CST 2014
[INFO] Final Memory: 7M/240M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.2:testCompile
(default-testCompile) on project test-maven: Compilation failure
[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
ole@MKI:~/test2$
===========================
RUN TEST WITH ECLIPSE - THEN TERMINAL
===========================
ole@MKI:~/test2$ mvn test
Warning: JAVA_HOME environment variable is not set.
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building test-maven 1.0.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.3:resources (default-resources) @
test-maven ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources,
i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /home/ole/test2/src/main/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.2:compile (default-compile) @ test-maven ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-resources-plugin:2.3:testResources (default-testResources) @
test-maven ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources,
i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /home/ole/test2/src/test/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.2:testCompile (default-testCompile) @
test-maven ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.10:test (default-test) @ test-maven ---
[INFO] Surefire report directory: /home/ole/test2/target/surefire-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running hello.HelloUnitTest
Greeting from hello the Unit Test!
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.065 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.323s
[INFO] Finished at: Wed Dec 31 12:52:48 CST 2014
[INFO] Final Memory: 8M/240M
[INFO] ------------------------------------------------------------------------
ole@MKI:~/test2$ mvn clean
Warning: JAVA_HOME environment variable is not set.
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building test-maven 1.0.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ test-maven ---
[INFO] Deleting /home/ole/test2/target
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.268s
[INFO] Finished at: Wed Dec 31 12:53:00 CST 2014
[INFO] Final Memory: 6M/240M
[INFO] ------------------------------------------------------------------------
Ole
On 12/31/2014 12:23 PM, Mark Eggers wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Ole,
In one instance (have to check your mail again) there were no files to
compile, so nothing bad happened.
If you run mvn clean test, then the target directory will be removed
and Maven will be forced to recompile everything.
You should get the command line failure consistently then.
- From your log that you posted:
Warning: JAVA_HOME environment variable is not set.
Also, can you run the following from the command line and see if it works?
javac -version
You should get the version of javac echoed. If not, you have a path
problem.
If you do, run the following command:
which javac
This should tell you where javac is installed. I don't know how
alternatives / OpenJDK gets installed on Ubuntu (I use Fedora and
Oracle's JDK), so I don't know if setting JAVA_HOME to javac's parent
directory is appropriate.
For example, on my system 'which javac' results in:
/usr/java/bin/javac
This means that javac is in /usr/java/bin, and the parent directory
(/usr/java) is the value that JAVA_HOME is set to on my system. This
is actually a link to where the current version of Java is installed
on my system.
One of these days I'll walk through alternatives and figure out if it
meets my needs (or if I should file bug reports).
. . . just my two cents
/mde/
On 12/31/2014 9:52 AM, Ole Ersoy wrote:
Hi Mark,
I do have Open JDK installed. The reason this is strange is
because the maven build runs fine from the command line after the
project is run with Eclipse. Other maven builds I have also run
fine from the command line. For example if I git clone apache
commons math and run the build, it builds fine.
In this case I'm just creating a very minimal project with: -
pom.xml - src/test/java/hello/HelloTest.java
When I try to run the build, it fails. If I import it into
eclipse, it runs. When I try the build from the command line
again, it runs. If I create another project with the same set of
original resources, it fails all over again.
Thoughts?
Thanks again, Ole
On 12/31/2014 11:17 AM, Mark Eggers wrote: On 12/31/2014 8:49 AM,
Ole Ersoy wrote:
Hi,
I'm seeing some strange behavior with Maven 3.0.5 on Ubuntu.
BACKGROUND ===================== When I run `mvn test` the
console prints: `[ERROR] No compiler is provided in this
environment. Perhaps you are running on a JRE rather than a
JDK?`
If I then open the project in Eclipse and run the test it
runs fine. Subsequently if I close Eclipse and run the test
with `mvn test` I get `BUILD SUCCESS`.
ANALYSIS ===================== I run `mvn test` on the
`test2` project, that was opened with eclipse, and I get ->
`BUILD SUCCESS`.
I then create a `test3` project, copy the pom and the src
directory from test2 to test 3. When running `mvn test` on
the `test3` project I get the error again. I included the
result from my console below:
ole@MKI:~/test2$ mvn test Warning: JAVA_HOME environment
variable is not set. [INFO] Scanning for projects... [INFO]
[INFO]
------------------------------------------------------------------------
[INFO] Building test-maven 1.0.0
[INFO]
------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.3:resources
(default-resources) @ test-maven --- [WARNING] Using platform
encoding (UTF-8 actually) to copy filtered resources, i.e.
build is platform dependent! [INFO] skip non existing
resourceDirectory /home/ole/test2/src/main/resources [INFO]
[INFO] --- maven-compiler-plugin:3.2:compile
(default-compile) @ test-maven --- [INFO] No sources to
compile [INFO] [INFO] ---
maven-resources-plugin:2.3:testResources
(default-testResources) @ test-maven --- [WARNING] Using
platform encoding (UTF-8 actually) to copy filtered
resources, i.e. build is platform dependent! [INFO] skip non
existing resourceDirectory /home/ole/test2/src/test/resources
[INFO] [INFO] --- maven-compiler-plugin:3.2:testCompile
(default-testCompile) @ test-maven --- [INFO] Nothing to
compile - all classes are up to date [INFO] [INFO] ---
maven-surefire-plugin:2.10:test (default-test) @ test-maven
--- [INFO] Surefire report directory:
/home/ole/test2/target/surefire-reports
------------------------------------------------------- T E S
T S -------------------------------------------------------
Running hello.HelloUnitTest Greeting from hello the Unit
Test! Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time
elapsed: 0.039 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO]
------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 1.027s
[INFO] Finished at: Wed Dec 31 10:41:25 CST 2014 [INFO]
Final Memory: 8M/240M [INFO]
------------------------------------------------------------------------
ole@MKI:~/test2$ mkdir ../test3
ole@MKI:~/test2$ cp pom.xml ../test3 ole@MKI:~/test2$ cp -r
src ../test3 ole@MKI:~/test2$ cd ../test3/ ole@MKI:~/test3$
mvn test Warning: JAVA_HOME environment variable is not set.
[INFO] Scanning for projects... [INFO] [INFO]
------------------------------------------------------------------------
[INFO] Building test-maven 1.0.0
[INFO]
------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.3:resources
(default-resources) @ test-maven --- [WARNING] Using platform
encoding (UTF-8 actually) to copy filtered resources, i.e.
build is platform dependent! [INFO] skip non existing
resourceDirectory /home/ole/test3/src/main/resources [INFO]
[INFO] --- maven-compiler-plugin:3.2:compile
(default-compile) @ test-maven --- [INFO] No sources to
compile [INFO] [INFO] ---
maven-resources-plugin:2.3:testResources
(default-testResources) @ test-maven --- [WARNING] Using
platform encoding (UTF-8 actually) to copy filtered
resources, i.e. build is platform dependent! [INFO] skip non
existing resourceDirectory /home/ole/test3/src/test/resources
[INFO] [INFO] --- maven-compiler-plugin:3.2:testCompile
(default-testCompile) @ test-maven --- [INFO] Changes
detected - recompiling the module! [WARNING] File encoding
has not been set, using platform encoding UTF-8, i.e. build
is platform dependent! [INFO] Compiling 1 source file to
/home/ole/test3/target/test-classes [INFO]
-------------------------------------------------------------
[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: 0.722s
[INFO] Finished at: Wed Dec 31 10:42:07 CST 2014 [INFO]
Final Memory: 8M/303M [INFO]
------------------------------------------------------------------------
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.2:testCompile
(default-testCompile) on project test-maven: Compilation failure
[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
ole@MKI:~/test3$ tree . ├── pom.xml ├── src │ └── test │
└── java │ └── hello │ └──
HelloUnitTest.java └── target ├── generated-test-sources │
└── test-annotations ├── maven-status │ └──
maven-compiler-plugin │ └── testCompile │ └──
default-testCompile │ ├── createdFiles.lst │
└── inputFiles.lst └── test-classes
12 directories, 4 files
Thoughts (Besides just open it in Eclipse :) )?
TIA, - Ole
Eclipse comes with its own compiler, so it only needs the JRE to
run.
The command line needs the JDK, which you don't have installed.
Install the JDK, set $JAVA_HOME, and make sure $JAVA_HOME/bin is
on your path.
See the bottom of the following page for detailed instructions:
http://maven.apache.org/download.cgi
If you're uncomfortable about using a different Java version
between command line and Eclipse, you can always point Eclipse to
the JRE inside the JDK and use that as the default JRE for Eclipse
and the IDE.
. . . just my two cents /mde/
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