[0.9.1][Dist][Bugfix] Fix mc2 process group #1831
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Signed-off-by: MengqingCao <[email protected]>
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Jul 17, 2025
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What this PR does / why we need it?
This pr fixes the bug, which throw an error
self.cpu_group is None. This is mainly caused by the wrong group ranks of process groups maintained in vllm-ascend. We need to take external dp size into account to ensure it work fine withexternal_launchmode.