ian-Liaozy opened a new pull request, #36090:
URL: https://github.com/apache/beam/pull/36090
Fixes #36088
**Description:**
This PR addresses an issue where resource hints, particularly `tags`, are
not correctly propagated when using the `with_exception_handling()` method on a
`ParDo` transform.
Currently, any resource hints applied via `.with_resource_hints()` are lost
when `with_exception_handling()` wraps the transform. The hints are not passed
from the original `ParDo` to the `_ExceptionHandlingWrapper`, and subsequently
not to the inner `ParDo` created within the wrapper's `expand` method. This
prevents effective control over stage fusion, which is critical for pipelines
utilizing accelerators like TPUs.
**Fix:**
This PR implements the following changes:
1. Modified `ParDo.with_exception_handling` to copy resource hints from the
`ParDo` instance to the created `_ExceptionHandlingWrapper` instance.
2. Modified `_ExceptionHandlingWrapper.expand` to copy resource hints from
the wrapper to the inner `beam.ParDo` instance it constructs.
These changes ensure that resource hints are preserved across the
`with_exception_handling` boundary.
------------------------
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