Fatal error compiling: invalid target release: 1.8

[zygimantus]

I got this error when building this project:

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 21:10 min
[INFO] Finished at: 2016-02-03T11:59:04+00:00
[INFO] Final Memory: 39M/448M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.3:compile (default-compile) on project org.wso2.carbon.launcher: Fatal error compiling: invalid target release: 1.8 -> [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/MojoExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn -rf :org.wso2.carbon.launcher

How to fix this?

[thusithathilina]

what is the jdk version that you are using? It should be 1.8

[zygimantus]

Ok. I specified oracle-jdk8 but now it have another error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.8:run (default) on project carbon-kernel-osgi-tests: An Ant BuildException has occured: Unable to read execution data file /home/travis/build/zygimantus/carbon-kernel/tests/osgi-tests/target/jacoco.exec
[ERROR] around Ant part ...jacoco:report... @ 7:18 in /home/travis/build/zygimantus/carbon-kernel/tests/osgi-tests/target/antrun/build-main.xml: /home/travis/build/zygimantus/carbon-kernel/tests/osgi-tests/target/jacoco.exec (No such file or directory)
[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/MojoExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn -rf :carbon-kernel-osgi-tests

[sameerajayasoma]

What is your OS? We have tested this build in Linux, OSX and Windows.

[Kishanthan]

@zygimantus can you try building the latest master branch?

So far we haven't seen this issue, but from the trace it looks like /home/travis/build/zygimantus/carbon-kernel/tests/osgi-tests/target/jacoco.exec was not generated properly during the build.

[zygimantus]

Yes, I am using master branch. I wonder if it is even possible to build this project using travis?

[Kishanthan]

We haven't used travis to build our code. but we are using jenkins for continuous build and you can check the build status from the dashboard at - https://wso2.org/jenkins/job/carbon-kernel/

It will not have any difference using jenkins or travis as they provide the build environment (maven, java, etc) which may not have any significant difference between the two IMO.

[zygimantus]

Probably I need to set some variables correctly.

[Manuri]

@zygimantus Did you skip tests with -DskipTests when building the project? In that case build fails since jacoco.exec is not generated.
However if you skipped tests with -Dmaven.test.skip then the build should pass since the profile which generates reports is activated depending on that property.