Github user cloud-fan commented on the issue: https://github.com/apache/spark/pull/21515 I hit an issue when using this script to prepare 2.4.0 rc1 ``` useradd: UID 0 is not unique The command '/bin/sh -c useradd -m -s /bin/bash -p spark-rm -u $UID spark-rm' returned a non-zero code: 4 ``` Any ideas about how to resolve it?
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