[data] Reset external queue metrics #56604
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Signed-off-by: iamjustinhsu <jhsu@anyscale.com>
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This pull request aims to fix the calculation of external queue metrics by moving the update from add_output to dispatch_next_task. While the intent is good, the new implementation in dispatch_next_task introduces two significant issues: an incorrect metric calculation logic and an unconditional assert False that will lead to a crash. My review provides a single comment with a suggested refactoring that addresses both problems, making the implementation correct and more robust.
python/ray/data/_internal/execution/streaming_executor_state.py
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Signed-off-by: iamjustinhsu <jhsu@anyscale.com>
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omatthew98
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Sep 18, 2025
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<!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> before: we updated metrics when we added an output, but the queue size after the operator is done adding outputs. after: we update every time we take an input. This should rise and fall back to 0 naturally <img width="741" height="279" alt="image" src="https://github.com/user-attachments/assets/e1a48097-e1dd-4b7b-9ce2-a23ab65d590b" /> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] 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 - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: iamjustinhsu <jhsu@anyscale.com> Signed-off-by: Zhiqiang Ma <zhiqiang.ma@intel.com>
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<!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> before: we updated metrics when we added an output, but the queue size after the operator is done adding outputs. after: we update every time we take an input. This should rise and fall back to 0 naturally <img width="741" height="279" alt="image" src="https://github.com/user-attachments/assets/e1a48097-e1dd-4b7b-9ce2-a23ab65d590b" /> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] 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 - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: iamjustinhsu <jhsu@anyscale.com> Signed-off-by: zac <zac@anyscale.com>
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<!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> before: we updated metrics when we added an output, but the queue size after the operator is done adding outputs. after: we update every time we take an input. This should rise and fall back to 0 naturally <img width="741" height="279" alt="image" src="https://github.com/user-attachments/assets/e1a48097-e1dd-4b7b-9ce2-a23ab65d590b" /> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] 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 - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: iamjustinhsu <jhsu@anyscale.com>
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<!-- Thank you for your contribution! Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request. --> <!-- Please add a reviewer to the assignee section when you create a PR. If you don't have the access to it, we will shortly find a reviewer and assign them to your PR. --> ## Why are these changes needed? <!-- Please give a short summary of the change and the problem this solves. --> before: we updated metrics when we added an output, but the queue size after the operator is done adding outputs. after: we update every time we take an input. This should rise and fall back to 0 naturally <img width="741" height="279" alt="image" src="https://github.com/user-attachments/assets/e1a48097-e1dd-4b7b-9ce2-a23ab65d590b" /> ## Related issue number <!-- For example: "Closes ray-project#1234" --> ## Checks - [ ] 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 - [ ] Release tests - [ ] This PR is not tested :( --------- Signed-off-by: iamjustinhsu <jhsu@anyscale.com> Signed-off-by: Future-Outlier <eric901201@gmail.com>
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Why are these changes needed?
before: we updated metrics when we added an output, but the queue size after the operator is done adding outputs.
after: we update every time we take an input. This should rise and fall back to 0 naturally
Related issue number
Checks
git commit -s) in this PR.scripts/format.shto lint the changes in this PR.method in Tune, I've added it in
doc/source/tune/api/under thecorresponding
.rstfile.