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[Data] Use application-level retries for Parquet metadata tasks #42922

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merged 10 commits into from
Feb 13, 2024

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@bveeramani bveeramani commented Feb 1, 2024

Why are these changes needed?

#42044 updated the ParquetDatasource logic so that Ray retries metadata fetching tasks that raise OSErrors.

if RETRY_EXCEPTIONS_FOR_META_FETCH_TASK is not None:
prefetch_remote_args[
"retry_exceptions"
] = RETRY_EXCEPTIONS_FOR_META_FETCH_TASK

The problem is that we retry tasks indefinitely, so if a metadata fetching tasks raises a non-transient OSError, your program freezes without warning.

"max_retries": -1,

To fix this issue, this PR replaces the Ray Core-level retry with finite application-level retries. It also updates the retry logic to apply jitter to backoffs that exceed the limit.

Related issue number

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  • I've signed off every commit(by using the -s flag, i.e., git commit -s) in this PR.
  • I've run scripts/format.sh to lint the changes in this PR.
  • I've included any doc changes needed for https://docs.ray.io/en/master/.
    • I've added any new APIs to the API Reference. For example, if I added a
      method in Tune, I've added it in doc/source/tune/api/ under the
      corresponding .rst file.
  • I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
  • Testing Strategy
    • Unit tests
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    • This PR is not tested :(

Signed-off-by: Balaji Veeramani <[email protected]>
Signed-off-by: Balaji Veeramani <[email protected]>
Signed-off-by: Balaji Veeramani <[email protected]>
Signed-off-by: Balaji Veeramani <[email protected]>
Signed-off-by: Balaji Veeramani <[email protected]>
@bveeramani bveeramani changed the title [Data] Fix Parquet retry [Data] Use application-level retries for Parquet metadata tasks Feb 6, 2024
@bveeramani bveeramani marked this pull request as ready for review February 6, 2024 21:11
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Thanks @bveeramani! Having some comments.

Signed-off-by: Balaji Veeramani <[email protected]>
Signed-off-by: Balaji Veeramani <[email protected]>
Signed-off-by: Balaji Veeramani <[email protected]>
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LGTM pending the test for the user workload.

Signed-off-by: Balaji Veeramani <[email protected]>
Signed-off-by: Balaji Veeramani <[email protected]>
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Error message LGTM

@bveeramani bveeramani merged commit 9031d9a into ray-project:master Feb 13, 2024
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@bveeramani bveeramani deleted the fix-parquet-retry branch February 13, 2024 01:40
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2 participants