Hi Dan, if you want to run a Flink job without specifying the main class via `bin/flink run --class org.a.b.Foobar` then you have to add a MANIFEST.MF file to your jar under META-INF and this file needs to contain `Main-Class: org.a.b.Foobar`.
Cheers, Till On Fri, Jun 12, 2020 at 12:30 AM Austin Cawley-Edwards < austin.caw...@gmail.com> wrote: > Hey all, > > Adding to Aaron's response, we use Bazel to build our Flink apps. We've > open-sourced some of our setup here[1] though a bit outdated. There are > definitely rough edges/ probably needs a good deal of work to fit other > setups. We have written a wrapper around the `java_library` and > `java_binary` and could do the same for `rules_scala`, though we just > started using Bazel last November and have a lot to learn in terms of best > practices there. > > If you're interested in contributing to a `rules_flink` project, I would > be as well! > > Best, > Austin > > [1]: https://github.com/fintechstudios/vp-operator-demo-ff-virtual-2020 > > On Thu, Jun 11, 2020 at 6:14 PM Aaron Levin <aaronle...@stripe.com> wrote: > >> Hi Dan, >> >> We use Bazel to compile our Flink applications. We're using "rules_scala" >> (https://github.com/bazelbuild/rules_scala) to manage the dependencies >> and produce jars. We haven't had any issues. However, I have found that >> sometimes it's difficult to figure out exactly what Flink target or >> dependency my application needs. >> >> Unfortunately I'm not sure what issue you're seeing here. I would guess >> either your flink application wasn't compiled into the jar >> you're executing. If you can paste the bazel target used to generate your >> jar and how you're launching the application, that will be helpful >> for diagnosis. >> >> On Thu, Jun 11, 2020 at 5:21 PM Dan Hill <quietgol...@gmail.com> wrote: >> >>> I took the Flink playground and I'm trying to swap out Maven for Bazel. >>> I got to the point where I'm hitting the following error. I want to diff >>> my code with an existing, working setup. >>> >>> Thanks! - Dan >>> >>> >>> client_1 | >>> org.apache.flink.client.program.ProgramInvocationException: >>> Neither a 'Main-Class', nor a 'program-class' entry was found in the jar >>> file. >>> >>> client_1 | at >>> org.apache.flink.client.program.PackagedProgram.getEntryPointClassNameFromJar(PackagedProgram.java:596) >>> >>> client_1 | at >>> org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:190) >>> >>> client_1 | at >>> org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:128) >>> >>> client_1 | at >>> org.apache.flink.client.cli.CliFrontend.buildProgram(CliFrontend.java:862) >>> >>> client_1 | at >>> org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:204) >>> >>> client_1 | at >>> org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:1050) >>> >>> client_1 | at >>> org.apache.flink.client.cli.CliFrontend.lambda$main$11(CliFrontend.java:1126) >>> >>> client_1 | at >>> org.apache.flink.runtime.security.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:30) >>> >>> client_1 | at >>> org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1126) >>> >>
