This class is the one with the main method. We use optional third-party analytics cookies to understand how you use GitHub.com so we can build better products. For more information, see our Privacy Statement. to your account. We use optional third-party analytics cookies to understand how you use GitHub.com so we can build better products. Take time to understand ! privacy statement. The -jar option only works if the JAR file is an executable JAR file, which means it must have a manifest file with a Main-Class attribute in it. Already on GitHub? This information was missing in the MANIFEST.MF.Below the content of this file before adding the maven-jar-plugin : mvn lagom:runAll can start all services successfully. We’ll occasionally send you account related emails. Millions of developers and companies build, ship, and maintain their software on GitHub — the largest and most advanced development platform in the world. they're used to log you in. no main manifest attribute, in "app.jar" Normally, if I had created the program myself, I would have added a main class attribute to the manifest file. Since your are running an executable jar file, Java will look for the manifest MANIFEST.MF located under META-INF/ which contains information about the files packaged.. Java must know the main class to run. Have a question about this project? they're used to gather information about the pages you visit and how many clicks you need to accomplish a task. no main manifest attribute, in /app.jar. You can see an example of this at https://github.com/lagom/lagom-java-maven-chirper-example/blob/8a0c2b93b84512679eea1d94f2773f5bfa2b4d65/chirp-impl/pom.xml#L104-L119, In the future, please ask questions in the discussion forum at https://discuss.lagomframework.com/. In order to run the main method from our jar, we need to mention it inside the ‘Main-Class’ property of the manifest file (mainClass attribute in POM.xml in case of Mavenized application) which needs to be bundled with the code as well. By clicking “Sign up for GitHub”, you agree to our terms of service and We use essential cookies to perform essential website functions, e.g. See Packaging Programs in JAR Files to learn how to create an executable JAR.. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. com.spotify docker-maven-plugin 1.1.1 hello-world java ["java", "-jar", "/${project.build.finalName}.jar"] / ${project.build.directory} ${project.build.finalName}.jar , mvn clean package docker:build can build docker image successfully. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. Subham Mittal has worked in Oracle for 3 years . "http://www.w3.org/2001/XMLSchema-instance", "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd", , , Fix no main manifest attribute, in jar Error in Spring Boot, no main manifest attribute, in Tutorial-0.0.1-SNAPSHOT.jar, Difference between Arraylist and Vector : Core Java Interview Collection Question, Amazon Interview Question : First Non repeated character in String, Count total number of times each alphabet appears in the string java program code with example, Java 8 new features : Lambda expressions , optional class , Defender methods with examples, Top 50 Java Collections Interview Questions and Answers, Java Multithreading Interview Questions and Answers. Problem: no main manifest attribute, in "APPLICATION_NAME.jar" 2 comments Comments. 提示没有入口类信息. Successfully merging a pull request may close this issue. You can always update your selection by clicking Cookie Preferences at the bottom of the page. But in this case, since the file is from an application, i cannot do that. That should have been java -jar app.jar instead of java -jar "app".. Download the official hello java maven sample code package. Trying to use docker-maven-plugin to generate docker image. When you run self-executable jar, java will look for the Main-Class in MANIFEST.MF file located under META-INF folder. If it is not able to find an entry,then it will complain with Unable to execute jar- file: “no main manifest attribute”.. MANIFEST.MF contains information about files contained in the Jar file. Learn more, We use analytics cookies to understand how you use our websites so we can make them better, e.g. Download the official hello java maven sample code package. docker run -p 9000:9000 hello-world return error "no main manifest attribute, in /stream-impl-1.0-SNAPSHOT.jar". https://github.com/lagom/lagom-java-maven-chirper-example/blob/8a0c2b93b84512679eea1d94f2773f5bfa2b4d65/chirp-impl/pom.xml#L104-L119. Learn more, Docker run get "no main manifest attribute". If it’s not an executable JAR, then you’ll need to run the program with something like: You signed in with another tab or window. Learn more. Copy link Quote reply lwu08 commented Jul 25, 2018. You need to set up the classpath and specify the main class in the entryPoint configuration. Add to POM the following (no other changes): Sign in 解决: 项目基于maven pom多模块的开发的,需要设置goal-repackage属性为true,否则打包后文件依赖文件没有一起打包,然后镜像内没有可以运行的程序文件. This isn't the right way to build a Docker image for a Lagom service.

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