IllegalArgumentException：无法将url（jar：file：/app.jar！/ BOOT-INF / classes！/）转换为文件

Question

使用Google Dataflow和其他服务构建Spring boot 2.0.0.RC应用程序，并使用以下maven命令mvn appengine:deploy进行部署。构建成功到AppEngine并创建一个实例。

问题出现在App Engine仪表板上，显示错误

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
Caused by: java.lang.RuntimeException: Failed to construct instance from factory method DataflowRunner#fromOptions(interface org.apache.beam.sdk.options.PipelineOptions)
at org.apache.beam.sdk.util.InstanceBuilder.buildFromMethod(InstanceBuilder.java:233)
at org.apache.beam.sdk.util.InstanceBuilder.build(InstanceBuilder.java:162)
at org.apache.beam.sdk.PipelineRunner.fromOptions(PipelineRunner.java:52)
at org.apache.beam.sdk.Pipeline.create(Pipeline.java:142)
at com.trackers.exlon.ExlonApplication.main(ExlonApplication.java:69)
... 8 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.beam.sdk.util.InstanceBuilder.buildFromMethod(InstanceBuilder.java:222)
... 12 more
Caused by: java.lang.IllegalArgumentException: Unable to convert url (jar:file:/app.jar!/BOOT-INF/classes!/) to file.
at org.apache.beam.runners.dataflow.DataflowRunner.detectClassPathResourcesToStage(DataflowRunner.java:1375)
at org.apache.beam.runners.dataflow.DataflowRunner.fromOptions(DataflowRunner.java:244)
... 17 more
Caused by: java.lang.IllegalArgumentException: URI is not hierarchical
at java.io.File.<init>(File.java:418)
at org.apache.beam.runners.dataflow.DataflowRunner.detectClassPathResourcesToStage(DataflowRunner.java:1371)
... 18 more

这是我使用的插件

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>com.google.cloud.tools</groupId>
            <artifactId>appengine-maven-plugin</artifactId>
            <version>${appengine.maven.plugin}</version>
        </plugin>
    </plugins>
</build>

问题

似乎数据流运行器DataflowRunner.detectClassPathResourcesToStage找不到java应用程序。我的代码有什么问题，或者我需要如何构建这个应用程序才能让dataflow运行者找到它？