tgravescs opened a new pull request #27583: [SPARK-29149] Update YARN cluster manager For Stage Level Scheduling URL: https://github.com/apache/spark/pull/27583 <!-- Thanks for sending a pull request! Here are some tips for you: 1. If this is your first time, please read our contributor guidelines: https://spark.apache.org/contributing.html 2. Ensure you have added or run the appropriate tests for your PR: https://spark.apache.org/developer-tools.html 3. If the PR is unfinished, add '[WIP]' in your PR title, e.g., '[WIP][SPARK-XXXX] Your PR title ...'. 4. Be sure to keep the PR description updated to reflect all changes. 5. Please write your PR title to summarize what this PR proposes. 6. If possible, provide a concise example to reproduce the issue for a faster review. --> ### What changes were proposed in this pull request? <!-- Please clarify what changes you are proposing. The purpose of this section is to outline the changes and how this PR fixes the issue. If possible, please consider writing useful notes for better and faster reviews in your PR. See the examples below. 1. If you refactor some codes with changing classes, showing the class hierarchy will help reviewers. 2. If you fix some SQL features, you can provide some references of other DBMSes. 3. If there is design documentation, please add the link. 4. If there is a discussion in the mailing list, please add the link. --> Yarn side changes for Stage level scheduling. The previous PR for dynamic allocation changes was https://github.com/apache/spark/pull/27053/files. Modified the data structures to store things on a per ResourceProfile basis. I tried to keep the code changes to a minimum, the main loop that requests just goes through each Resourceprofile and the logic inside for each one stayed very close to the same. On submission we now have to give each ResourceProfile a separate yarn Priority because yarn doesn't support asking for containers with different resources at the same Priority. We just use the profile id as the priority level. Using a different Priority actually makes things easier when the containers come back to match them again which ResourceProfile they were requested for. The expectation is that yarn will only give you a container with resource amounts you requested or more. It should never give you a container if it doesn't satisfy your resource requests. If you want to see the full feature changes you can look at https://github.com/apache/spark/pull/27053/files for reference ### Why are the changes needed? <!-- Please clarify why the changes are needed. For instance, 1. If you propose a new API, clarify the use case for a new API. 2. If you fix a bug, you can clarify why it is a bug. --> For stage level scheduling YARN support. ### Does this PR introduce any user-facing change? <!-- If yes, please clarify the previous behavior and the change this PR proposes - provide the console output, description and/or an example to show the behavior difference if possible. If no, write 'No'. --> no ### How was this patch tested? <!-- If tests were added, say they were added here. Please make sure to add some test cases that check the changes thoroughly including negative and positive cases if possible. If it was tested in a way different from regular unit tests, please clarify how you tested step by step, ideally copy and paste-able, so that other reviewers can test and check, and descendants can verify in the future. If tests were not added, please describe why they were not added and/or why it was difficult to add. --> Tested manually on YARN cluster and then unit tests.
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