[ERROR] Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:2.5:clean (default-clean) on project hadoop_test: Failed to clean project: Failed to delete /home/winstercheng/java/workspace/hadoop_test/target/classes/hadoop_test/WordCount.
现象:---------------------------------[ERROR] Failure executing javac, but could not parse the error:javac: invalid target release: 1.8Usage: javac <options> <source files>use -help for a list of possible option---------------------------------调