kubeflow / trainer / 22912631191

Pull #3237

github

feat(runtimes): add framework-level env var conflict validation across plugins

Add cross-plugin environment variable conflict detection to prevent
runtime issues when plugins share reserved env names:

- Add MPIRunReservedEnvNames constant for OpenMPI reserved env vars
- Add EnvVarsReserverPlugin interface for plugins to expose reserved env names
- Implement ReservedEnvVarNames() on MPI and Torch plugins
- Add user-env conflict validation to MPI plugin (mirrors existing Torch pattern)
- Add cross-plugin conflict detection in RunCustomValidationPlugins
- Add unit tests for MPI env validation

Closes #3147

27 of 45 new or added lines in 3 files covered. (60.0%)

1763 of 2966 relevant lines covered (59.44%)

0.69 hits per line