MPICH2 gethostbyname失败 [英] MPICH2 gethostbyname failed

问题描述

我不明白该错误消息.我试图做的是在将mpich2版本1.4或1.5安装到/opt/mpich2之后，运行MPICH2应用程序(两个版本均因相同的错误而失败).我的MPI应用程序是使用1.3编译的，但是我可以在另一个工作站上使用mpi 1.4来运行它.我正在Ubuntu 12.04上对其进行测试.

I don't understand the error message. I am trying to do is to run a MPICH2 application after I installed mpich2 version 1.4 or 1.5 to /opt/mpich2 (both version failed with the same error). My MPI application was compiled with 1.3 but I am able to run it with mpi 1.4 on another workstation. I am testing it on Ubuntu 12.04.

Fatal error in PMPI_Init_thread: Other MPI error, error stack:
MPIR_Init_thread(467)..............: 
MPID_Init(177).....................: channel initialization failed
MPIDI_CH3_Init(70).................: 
MPID_nem_init(319).................: 
MPID_nem_tcp_init(171).............: 
MPID_nem_tcp_get_business_card(418): 
MPID_nem_tcp_init(377).............: gethostbyname failed, localhost (errno 3)

推荐答案

macOS解决方案

我在macOS 10.12.1上偶然发现了这个问题.

Solution for macOS

I stumbled upon this issue on macOS 10.12.1.

解决方案是将127.0.0.1 computername.local添加到/etc/hosts.您的文件或多或少看起来像这样:

The solution is to add 127.0.0.1 computername.local to /etc/hosts. Your file will look more or less like this:

##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1   localhost
127.0.0.1   computername.local
255.255.255.255 broadcasthost
::1             localhost 

如果您转到系统偏好设置> 共享> 计算机名称，则可以更改/检查计算机的名称.

You can change/check your computer's name if you go to System Preferences > Sharing > Computer Name.

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