chamikaramj opened a new issue, #29354:
URL: https://github.com/apache/beam/issues/29354

   ### What would you like to happen?
   
   Expansion request contains a set of components [1] which may be used to 
generate a pipeline, for example, via Java Rehydration [2]. Validation of the 
pipeline may fail if some of the requirements are missing, for example [3], 
hence required requirements have to be sent along with the expansion request.
   
   [1] 
https://github.com/apache/beam/blob/f929d08417776f13836835972711a48f487edad6/model/job-management/src/main/proto/org/apache/beam/model/job_management/v1/beam_expansion_api.proto#L35
   [2] 
https://github.com/apache/beam/blob/f929d08417776f13836835972711a48f487edad6/runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/RehydratedComponents.java
   [3] 
https://github.com/apache/beam/blob/f929d08417776f13836835972711a48f487edad6/runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/graph/PipelineValidator.java#L253
   
   ### Issue Priority
   
   Priority: 3 (nice-to-have improvement)
   
   ### Issue Components
   
   - [ ] Component: Python SDK
   - [ ] Component: Java SDK
   - [ ] Component: Go SDK
   - [ ] Component: Typescript SDK
   - [ ] Component: IO connector
   - [ ] Component: Beam YAML
   - [ ] Component: Beam examples
   - [ ] Component: Beam playground
   - [ ] Component: Beam katas
   - [ ] Component: Website
   - [ ] Component: Spark Runner
   - [ ] Component: Flink Runner
   - [ ] Component: Samza Runner
   - [ ] Component: Twister2 Runner
   - [ ] Component: Hazelcast Jet Runner
   - [ ] Component: Google Cloud Dataflow Runner


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