Runnable jar production mode: Failed to find the bundle manifest file 'frontend://vaadin-flow-bundle-manifest.json'

Question

In my Kotlin Jetty project I build by maven. I need to start applcation in production mode. (from here https://vaadin.com/docs/flow/production/tutorial-production-mode-basic.html) As result in my pom.xml

    <profiles>
        <profile>
            <id>production-mode</id>
            <dependencies>
                <dependency>
                    <groupId>com.vaadin</groupId>
                    <artifactId>flow-server-production-mode</artifactId>
                </dependency>
            </dependencies>

            <build>
                <plugins>
                    <plugin>
                        <groupId>com.vaadin</groupId>
                        <artifactId>vaadin-maven-plugin</artifactId>
                        <version>${vaadin.version}</version>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>copy-production-files</goal>
                                    <goal>package-for-production</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
</profile>

So to start in production mode by Maven I use command:

mvn jetty:run-exploded -Pproduction-mode

and my web application start in production mode. Nice.

But I alson need to create executable jar (or war) to start my web application from console. So as result I use maven's pluggin "maven-shade-plugin" So in my pom.xml I add:

plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.1</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <transformers>
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>com.myproject.AppStarterKt</mainClass>
                                </transformer>
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
</plugin>

and create jar in production mode:

mvn verify -Pproduction-mode

as result I get standalone (runnable) jar that content all dependencies. Nice.

But when I want to start standalone jar in PRODUCTION MODE like this:

java -Dvaadin.productionMode=true -jar myproject-1.0-SNAPSHOT.jar

But I get error:

[qtp1495242910-15] WARN org.eclipse.jetty.server.handler.ContextHandler.ROOT - unavailable
java.lang.IllegalArgumentException: Failed to find the bundle manifest file 'frontend://vaadin-flow-bundle-manifest.json' in the servlet context for 'ES6' browsers. If you are running a dev-mode servlet container in maven e.g. `jetty:run` change it to `jetty:run-exploded`. If you are not compiling frontend resources, include the 'vaadin-maven-plugin' in your build script. Otherwise, you can skip this error either by disabling production mode, or by setting the servlet parameter 'original.frontend.resources=true'.
    at com.vaadin.flow.server.startup.BundleFilterFactory.readBundleManifest(BundleFilterFactory.java:89)
    at com.vaadin.flow.server.startup.BundleFilterFactory.createBundleFilterForBrowser(BundleFilterFactory.java:79)
    at com.vaadin.flow.server.startup.BundleFilterFactory.createFilters(BundleFilterFactory.java:70)
    at com.vaadin.flow.server.VaadinService.init(VaadinService.java:275)
    at com.vaadin.flow.server.VaadinServlet.createServletService(VaadinServlet.java:201)
    at com.vaadin.flow.server.VaadinServlet.createServletService(VaadinServlet.java:182)
    at com.vaadin.flow.server.VaadinServlet.init(VaadinServlet.java:72)
    at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:672)
    at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:521)
    at org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:805)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:537)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
    at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:61)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    at org.eclipse.jetty.server.Server.handle(Server.java:502)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
    at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
    at java.lang.Thread.run(Unknown Source)
[qtp1495242910-15] WARN org.eclipse.jetty.server.HttpChannel - /booking-v2
javax.servlet.ServletException: com.vaadin.flow.server.startup.ServletDeployer@a1f5568f==com.vaadin.flow.server.VaadinServlet,jsp=null,order=-1,inst=false,async=true
    at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:693)
    at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:521)
    at org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:805)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:537)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
    at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:61)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    at org.eclipse.jetty.server.Server.handle(Server.java:502)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
    at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalArgumentException: Failed to find the bundle manifest file 'frontend://vaadin-flow-bundle-manifest.json' in the servlet context for 'ES6' browsers. If you are running a dev-mode servlet container in maven e.g. `jetty:run` change it to `jetty:run-exploded`. If you are not compiling frontend resources, include the 'vaadin-maven-plugin' in your build script. Otherwise, you can skip this error either by disabling production mode, or by setting the servlet parameter 'original.frontend.resources=true'.
    at com.vaadin.flow.server.startup.BundleFilterFactory.readBundleManifest(BundleFilterFactory.java:89)
    at com.vaadin.flow.server.startup.BundleFilterFactory.createBundleFilterForBrowser(BundleFilterFactory.java:79)
    at com.vaadin.flow.server.startup.BundleFilterFactory.createFilters(BundleFilterFactory.java:70)
    at com.vaadin.flow.server.VaadinService.init(VaadinService.java:275)
    at com.vaadin.flow.server.VaadinServlet.createServletService(VaadinServlet.java:201)
    at com.vaadin.flow.server.VaadinServlet.createServletService(VaadinServlet.java:182)
    at com.vaadin.flow.server.VaadinServlet.init(VaadinServlet.java:72)
    at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:672)

Answer 1

During a production build, vaadin-maven-plugin creates a production bundle and puts the resulting files in /target/<nameAndVersion>/ so that the files would be available as static resources when deployed as a .war. When packaging as a jar file and embedding a servlet container, you need to configure the plugin to put those files in some other location instead.

What location to use be depends on how the embedded servlet container is configured. One quite popular choice is to use META-INF/resources. To make it work in this way, you can set the transpileOutputDirectory configuration parameter for the plugin to ${project.build.outputDirectory}/META-INF/resources.