v1.12.* should require protobuf >=6.31.1 #68

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1. kho commented on Jun 22, 2026

   

   kho

   on Jun 22, 2026

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   Copied here for better visibility:

   (Regarding _PROTOBUF_VERSION = "6.31.1" in WORKSPACE)

   This bump in protobuf version is not reflected in https://github.com/tensorflow/metadata/blob/master/setup.py#L139. As a result, pip might install an older version of protobuf (e.g. required by an older version of tensorflow) and the latest version of tensorflow-metadata, which results in an import time failure.

   Here's an example for reproducing the problem:

   #!/bin/bash -e
   mkdir /tmp/test_meta
   cd /tmp/test_meta
   uv venv --python=3.12
   uv pip install tensorflow==2.18 tensorflow-metadata
   uv run python -c 'from tensorflow_metadata import proto'
   

   This will now install protobuf==5.29.6 (required by tensorflow==2.18.0) and lead to the following error:

   Traceback (most recent call last):
     File "<string>", line 1, in <module>
     File "/tmp/test_meta/.venv/lib/python3.12/site-packages/tensorflow_metadata/proto/__init__.py", line 16, in <module>
       from tensorflow_metadata.proto.v0 import (
     File "/tmp/test_meta/.venv/lib/python3.12/site-packages/tensorflow_metadata/proto/v0/anomalies_pb2.py", line 12, in <module>
       _runtime_version.ValidateProtobufRuntimeVersion(
     File "/tmp/test_meta/.venv/lib/python3.12/site-packages/google/protobuf/runtime_version.py", line 100, in ValidateProtobufRuntimeVersion
       _ReportVersionError(
     File "/tmp/test_meta/.venv/lib/python3.12/site-packages/google/protobuf/runtime_version.py", line 50, in _ReportVersionError
       raise VersionError(msg)
   google.protobuf.runtime_version.VersionError: Detected incompatible Protobuf Gencode/Runtime versions when loading tensorflow_metadata/proto/v0/anomalies.proto: gencode 6.31.1 runtime 5.29.6. Runtime version cannot be older than the linked gencode version. See Protobuf version guarantees at https://protobuf.dev/support/cross-version-runtime-guarantee.