GitLab Runner No Compiler - maven

Question

need some help to help to solve this issue.
Iam running my gitlab ci, to test my maven project, everthing ist working fine but when its starting to compiling/building/installing following error recieves:
Running with gitlab-runner 10.5.0 (80b03db9)
on RolfsRunner 7d39f8f7
Using Shell executor...
Running on ISC-PRAKTIKANT...
Fetching changes...
Removing target/
HEAD is now at a7189518 7.2
Checking out a7189518 as rolf...
Skipping Git submodules setup
Checking cache for default...
Successfully extracted cache
$ cd C:\Program Files\GitLab-Runner\builds\7d39f8f7\0\dev\imsPlatform & mvn compile
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for de.immersight:imsPlatform:war:1.0
[WARNING] 'dependencies.dependency.systemPath' for immersight:imsLibrary:jar should use a variable instead of a hard-coded path C:\Users\Rolf\Desktop\imsLibrary-1.0.jar # line 59, column 19
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]
[INFO] ---------------------< de.immersight:imsPlatform >----------------------
[INFO] Building imsPlatform 1.0
[INFO] --------------------------------[ war ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) # imsPlatform ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\Program Files\GitLab-Runner\builds\7d39f8f7\0\dev\imsPlatform\de\immersight\stats\database\versions
[INFO] Copying 1 resource
[INFO] Copying 154 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) # imsPlatform ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 172 source files to C:\Program Files\GitLab-Runner\builds\7d39f8f7\0\dev\imsPlatform\target\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: 2.769 s
[INFO] Finished at: 2018-03-13T13:05:58+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project imsPlatform: Compilation failure
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
[ERROR]
[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
Running after script...
$ echo CI_ENVIRONMENT_NAME
CI_ENVIRONMENT_NAME
ERROR: Job failed: exit status 1
My eclipse and windows cmd compiling fine without problems everthing is installed and all environment variables are set:
C:\Users\Rolf>mvn -version
Apache Maven 3.5.3 (3383c37e1f9e9b3bc3df5050c29c8aff9f295297; 2018-02-24T20:49:05+01:00)
Maven home: C:\Users\Rolf\Maven-3.5.3\bin\..
Java version: 1.8.0_161, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.8.0_161\jre
Default locale: de_DE, platform encoding: Cp1252
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"
C:\Users\Rolf>javac -version
javac 1.8.0_161

Answer 1

I had the same problem. After installing a JDK and editing the environment variables I had to restart my gitlab-runner with administrator privileges.
gitlab-runner.exe restart
May not interesting for you anymore ;)