What does it mean and how it can be removed (reformatted for better readability)?
[INFO] Compiling 30 source files to ...\target\test-classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] Failure executing javac, but could not parse the error:
warning: Supported source version 'RELEASE_5' from annotation processor
'org.sonatype.guice.bean.scanners.index.QualifiedIndexAPT6'
less than -source '1.6'
warning: No processor claimed any of these annotations:
org.junit.Ignore,org.junit.Test,org.junit.BeforeClass
This happens when org.sonatype.sisu:sisu-inject-plexus:2.1.1 is one of project dependencies.
The first warning was removed after upgrading of sisu-inject-plexus up to:
<dependency>
<groupId>org.sonatype.sisu</groupId>
<artifactId>sisu-inject-plexus</artifactId>
<version>2.3.0</version>
</dependency>
The second one after using -Xlint:-processing flag of javac compiler:
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<executions>
<execution>
<id>default-testCompile</id>
<configuration>
<compilerArgument>-Xlint:-processing</compilerArgument>
</configuration>
</execution>
<execution>
</plugin>
Otherwise, we can use
<compilerArgument>-proc:none</compilerArgument>