Error: Invalid or corrupt jarfile /app.jar

I have setup the following Dockerfile. Everything seems to build fine but getting the error that it is corrupt. I did verify that java 8 is set in the POM and manually executed the jar so I know it is working. The other change is that I moved the Dockerfile to the project root. Docker complains about any type of ../ being used to get a path.

Should this work?

FROM dockerfile/java:oracle-java8
VOLUME /tmp
ADD target/core-0.1.0-RELEASE.jar app.jar
RUN bash -c 'touch /app.jar'
ENTRYPOINT ["java","-jar","-Dspring.profiles.active=local","/app.jar"]

[ccit-spence]

ok, got it to work.

FROM dockerfile/java:oracle-java8
VOLUME /tmp
ADD target/core-0.1.0-RELEASE.jar target/app.jar
RUN bash -c 'touch target/app.jar'
ENTRYPOINT ["java","-jar","-Dspring.profiles.active=local","target/app.jar"]

[givenm]

For me when I was having the issue, all I did was put the JAR_FILE argument in the pom without the forward slash “/” and it worked.

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <version>1.2.0</version>
                <configuration>
                    <imageName>${docker.image.prefix}/${project.artifactId}</imageName>
                    <imageTags>
                        <imageTag>${project.version}</imageTag>
                        <imageTag>latest</imageTag>
                    </imageTags>
                    <!-- optionally overwrite tags every time image is built with docker:build -->
                    <forceTags>true</forceTags>
                    <dockerDirectory>src/main/docker</dockerDirectory>
                    <buildArgs>
                        <JAR_FILE>${project.build.finalName}.jar</JAR_FILE>
                    </buildArgs>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>

Also my Dockerfile is like below

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]