conf/alluxio-site.properties do not work

[sunzhaoyang]

Alluxio Version:
2.9.3

Describe the bug

changed alluxio.master.hostname from localhost to another ip, but still goes localhost

To Reproduce
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Expected behavior
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Urgency
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Are you planning to fix it
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Additional context
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[YichuanSun]

Never mind, the root@localhost's pasword: is a known and trivial bug. If you don't input the password, the cluster will also start successfully.