[GitHub] [beam] damccorm opened a new issue, #20245: Dataflow SpringBoot app fails to run when bundled as a fat uber jar

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damccorm opened a new issue, #20245:
URL: https://github.com/apache/beam/issues/20245

   I have been working on a service that programmatically builds Dataflow pipeline using SpringBoot. My service runs perfectly when the application is started from the (IntelliJ) IDE or when I run with `./gradlew run` but fails when I create the fat-uber-jar.
   
   The issue seems to be related to https://issues.apache.org/jira/browse/BEAM-1325 and another issue https://github.com/GoogleCloudPlatform/DataflowJavaSDK/issues/538 (although that is about an IDE and this is more broadly about development and deployment).
   
   To verify, I opened the built jar and I see the following entries in the `MANIFEST.MF` file:
   
   ```
   
   Manifest-Version: 1.0
   Main-Class: org.springframework.boot.loader.JarLauncher
   Start-Class: com.example.dataExtractor.ApplicationKt
   Spring-Boot-Version:
   2.2.5.RELEASE
   Spring-Boot-Classes: BOOT-INF/classes/
   Spring-Boot-Lib: BOOT-INF/lib/
   
   ```
   
   
   This seems to be a pretty standard way of building SpringBoot apps and would appreciate some guidance in this direction.
   
   I originally posted this as an issue to [GoogleCloudPlatform/DataflowJavaSDK](https://github.com/GoogleCloudPlatform/DataflowJavaSDK/issues/649) and they redirected me here.
   
   
   Meanwhile, I have unblocked myself with a workaround which has its own drawbacks. 
   I wrote an [article](https://suspendfun.com/2020/Dataflow-Springboot-app-fails-to-run-when-dockerised/) with more context if it helps.
   
   Imported from Jira [BEAM-9669](https://issues.apache.org/jira/browse/BEAM-9669). Original Jira may contain additional context.
   Reported by: raj-saxena.


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