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Upgrading
torchto2.8.0introduces a significant compatibility risk with the pinned versions ofapache-beam(2.49.0) andtransformers(4.38.0). Specifically, PyTorch 2.6+ defaultstorch.loadtoweights_only=True. Apache Beam 2.49.0 does not support passing theweights_onlyargument to its model handlers (this was added in Beam 2.58.0). If the model state dict contains any non-tensor objects, the pipeline will fail with anUnpicklingError. Additionally, internal API changes in PyTorch 2.8.0 (such as_pytreemodifications and the change fromRuntimeErrortoNotImplementedErrorfor unsupported ops) often break older versions oftransformers. To maintain pipeline stability, it is recommended to upgradeapache-beamto2.58.0or newer andtransformersto4.40.0or newer alongside this change.