mpdboot problem:mpd failed to start correctly / unable to ping local mpd
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Apologies, it seems that YAST does weird things with /etc/hosts afteryou make changes, so this is where the 127.0.0.2 appears.mpdboot works fine now.Cheers,TomOn Sun, 2006-05-21 at 18:43 +0100, Tom Crick wrote:> Hello,> > I've been having an issue using mpdboot (MPICH2 1.0.2) on a beowulf> cluster of 20 nodes running SuSE 9.2. After following the mpd> troubleshooting guide in the MPICH2 install doc, I can still find no> obvious answer why I am unable to start mpds on the 20 nodes using> mpdboot.> > mpdboot gives a message like:> > mpdboot_grendel13_11 (err_exit 415): mpd failed to start correctly on> grendel13> reason: 11: unable to ping local mpd;> invalid msg from mpd :{}:> ** mpd may have disappeared, perhaps due to mismatched secretwords> ** see msgs logged in syslog and /tmp/mpd2.logfile* on grendel13> last printed output from mpd before becoming a daemon: 32838> > mpdboot_grendel13_11 (err_exit 421): contents of mpd logfile in /tmp:> logfile for mpd with pid 3828> grendel13_32838: conn error in connect_rhs: Connection refused> grendel13_32838 (connect_rhs 602): failed to connect to rhs at> 127.0.0.2 32849> grendel13_32838 (enter_ring 513): rhs connect failed> grendel13_32838 (run 215): failed to enter ring> > > Even if you start an mpd manually on the head node and then on each work> node e.g. "mpd -h <host> -p <port> &", it fails like above. Is it> something to do with the "failed to connect to rhs at 127.0.0.2 32849"?> > It is possible to ssh from every machine to every other and running> "mpdcheck -v -f /etc/mpd.hosts -ssh" from the head node gives no errors> or problems. Checking the log files on the failing machines gives no> more info than above and the secretwords on all machines are the same.> > Any ideas for next step of debugging? Should mpd be run as root?> > Thanks and regards,> > Tom> 简单一点说，就是把/etc/hosts文件中带有“127.0.0.1 ”的一行注释掉，这样可能会引起系统启动时，
在starting sendmail外停留很久，2-5分钟都有可能
建议，因此关掉sendmail服务。
如果上面的方法不能解决问题，请参考：http://blog.csdn.net/zhuliting/archive/2010/09/29/5915224.aspx
from:http://lists.mcs.anl.gov/pipermail/mpich-discuss/2006-May/001388.html
