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I recently upgrade my machine to the latest version of java 6, and keep getting this error when building the project. Does anyone what this means?
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project
biz.minaret: Compilation failure
[ERROR] Failure executing javac, but could not parse the error:
[ERROR] javac: invalid target release: 1.6.0_45
[ERROR] Usage: javac <options> <source files>
[ERROR] use -help for a list of possible options
Part of my pom looks like this
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven.compiler.plugin.version}</version>
<configuration>
<source>1.6.0_45</source>
<target>1.6.0_45</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
My JAVA_HOME is properly set:
PS C:\Users\me\Documents\m
Documents\myproject> java -version
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode)>
And:
Documents\myproject> javac -version
javac 1.6.0_45
856
The error is invalid target release: 17 - that means the project’s Java version is 17 but Maven is running under lower JDK version. To see the version of JDK that runs Maven, type mvn -v and you will see something like this: Maven home: g:\apache-maven-3.6.3\bin\..
Invalid Target Release: 1.9. This error will come if your Maven compiler plugin has <target>1.9</target> but the JAVA_HOME variable in your machine is referring to a Java version that is lower than JDK 1.9, e.g. JDK 1.8 or JDK 1.7.
You may encounter the following error when running a Maven build: This problem is due to the fact that the environment variable JAVA_HOME and the target property of the maven-compiler-plugin point to a different JDK versions. The easy solution will be to fill JAVA_HOME with the correct value.
Because Java 7 was not required for my project, I just had to change the Maven compile plugin as follows: But if you have to build your Java project with JDK 1.7, then just install and update your JAVA_HOME variable and this error will go away. This solution is really nice as you can solve the problem immediately.
You should use things like 1.6 or 1.7 without build numbers.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven.compiler.plugin.version}</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
The encoding part should be solved by using the following properties:
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
After you have defined that you can simplyfied the above configuration to the following
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven.compiler.plugin.version}</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
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