为什么datajuicer在Ray模式下，不支持groupby算子呢？ #920
Description
Before Asking
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I have asked the Data-Juicer Q&A Copilot (available on Doc Site, DingTalk, or Discord), but the problem still persists.
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I have read the README carefully.
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I have pulled the latest code of main branch to run again and the problem still existed.
Search before asking
- I have searched the Data-Juicer issues and found no similar questions.
Question
groupby算子仅支持default模式，不支持ray模式，是因为ray模式下大规模数据时可能会数据倾斜导致OOM吗？还是说和数据规模无关，ray模式下就是不能groupby？
Environment Information
No response
Additional Context
No response