请问楼主问题解决了吗?我近期也遇到了类似的问题。 具体情况是：器群含多台主机，安装的是OpenMPI 4.0.3，操作系统是CentOS7.3.1611.网卡都是CX5网卡。主从节点是通过NFS共享相关文件。SSH互信已经配好，且没问题。环境变量也已同步。 问题是： 当主节点通过mpirun访问某一特定从节点的时候报错（添加-x PATH=$PATH -x LD_LIBRARY_PATH=$LD_LIBRARY_PATH也报错）： [s77-3:19940] [[63847,0],0] ORTE_ERROR_LOG: Error in file base/plm_base_launch_support.c at line 1200 -------------------------------------------------------------------------- ORTE was unable to reliably start one or more daemons. This usually is caused by: （中间和楼主截图中内容一致，在此省去） * an inability to create a connection back to mpirun due to a lack of common network interfaces and/or no route found between them. Please check network connectivity (including firewalls and network routing requirements). 当主从节点互换后运行mpirun没问题；主节点访问其他从节点也都没问题。 目前猜测问题和“lack of authority to execute on one or more specified nodes. Please verify your allocation and authorities.”有关。 求助专家给予解答~