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应该就是这个问题,虽然我还不确定问题是怎么发生的,但我已经解决了。 Linux Mint 18 软件源自带的OpenMPI是1.10.2,好像整个OpenMPI 1.10版本包括1.10.2和1.10.7都有这个问题,然后换成2.0.4就好了。