When you use cross-language Java transforms from Python we use the default environment for Java transforms which always gets set to Docker. https://github.com/apache/beam/blob/7f0d11e65bbcd3e9c565a50aa6a56c0631c4358b/sdks/java/expansion-service/src/main/java/org/apache/beam/sdk/expansion/service/ExpansionService.java#L447 https://github.com/apache/beam/blob/7f0d11e65bbcd3e9c565a50aa6a56c0631c4358b/runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/Environments.java#L134
I don't think we support running Java cross-language transforms in other environments yet. Thanks, Cham On Tue, May 4, 2021 at 12:30 PM Nir Gazit <nir....@gmail.com> wrote: > But looking at the code of the exception > <https://github.com/apache/beam/blob/master/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/control/DefaultJobBundleFactory.java#L252> > it > seems that it tries to use docker only because it thinks it's in a docker > environment, no? Shouldn't it use the external environment (that's available > there as well > <https://github.com/apache/beam/blob/master/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/control/DefaultJobBundleFactory.java#L252>) > if it got that in PipelineOptions? > > Otherwise, how can I have docker on a k8s pod? I couldn't seem to find any > examples for that and saw that it's highly unrecommended. > > Thanks! > Nir > > On Tue, May 4, 2021 at 9:08 PM Chamikara Jayalath <chamik...@google.com> > wrote: > >> Ah, I think you need the DOCKER environment to use cross-language >> transforms not the EXTERNAL environment (agree that the terminology is >> confusing). >> >> On Tue, May 4, 2021 at 11:04 AM Nir Gazit <nir....@gmail.com> wrote: >> >>> Yes that’s on purpose. I’m running in Kubernetes which makes it hard to >>> install docker on the pods so I don’t want to use the docker environment. >>> That’s why I specified EXTERNAL environment in PipelineOptions. However, it >>> seems that it doesn’t get propagated. >>> >>> On Tue, 4 May 2021 at 20:59 Chamikara Jayalath <chamik...@google.com> >>> wrote: >>> >>>> Is it possible that you don't have the "docker" command available in >>>> your system ? >>>> >>>> On Tue, May 4, 2021 at 10:28 AM Nir Gazit <nir....@gmail.com> wrote: >>>> >>>>> Hey, >>>>> I'm trying to run a pipeline with a Kafka Source, using an EXTERNAL >>>>> environment. However, when the pipeline is run, the error below is thrown, >>>>> which implies that for some reason the external environment pipeline >>>>> options didn't get in. When replacing the Kafka Source with an S3 source >>>>> (for example) I don't get this error so it implies that it's >>>>> somewhere around the external transform / expansion service area. How can >>>>> I >>>>> debug this? >>>>> >>>>> Caused by: java.io.IOException: Cannot run program "docker": error=2, >>>>> No such file or directory >>>>> at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048) >>>>> at >>>>> org.apache.beam.runners.fnexecution.environment.DockerCommand.runShortCommand(DockerCommand.java:189) >>>>> at >>>>> org.apache.beam.runners.fnexecution.environment.DockerCommand.runShortCommand(DockerCommand.java:171) >>>>> at >>>>> org.apache.beam.runners.fnexecution.environment.DockerCommand.runImage(DockerCommand.java:95) >>>>> at >>>>> org.apache.beam.runners.fnexecution.environment.DockerEnvironmentFactory.createEnvironment(DockerEnvironmentFactory.java:131) >>>>> at >>>>> org.apache.beam.runners.fnexecution.control.DefaultJobBundleFactory$1.load(DefaultJobBundleFactory.java:252) >>>>> at >>>>> org.apache.beam.runners.fnexecution.control.DefaultJobBundleFactory$1.load(DefaultJobBundleFactory.java:231) >>>>> >>>>
