Error: Liferay ext-service.jar

BUILD FAILED
/home/liyushiro/Liferay/ext/build-parent.xml:99: The following error occurred while executing this line:
/home/liyushiro/Liferay/ext/ext-service/build-parent.xml:35: /home/liyushiro/Liferay/ext/ext-service/ext-service.jar is read-only.

Total time: 2 seconds
<target name=”jar” depends=”compile”>
<jar
basedir=”classes”
jarfile=”${jar.file}.jar”

Este erro é devido que você está utilizando OpenJDK, melhor desistalar e  installar o JDK.

Espero ter ajudado