产生原因:hostname 与 /etc/hosts 名称不对应
hostname 查看本机名称,例如本机名称(studyjava)
vi /etc/hosts
修改前:
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
修改后:
127.0.0.1 localhost localhost.localdomain studyjava localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
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