<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>As the error message says, one possible cause is the connection
being blocked by a firewall.<br>
</p>
<p>Another possible cause is a ssh passwordless access problem:<br>
</p>
<p><a class="moz-txt-link-freetext" href="https://stackoverflow.com/questions/19565795/unable-to-execute-mpich2-on-multiple-machines-on-ubuntu-12-04-hydu-sock-connect">https://stackoverflow.com/questions/19565795/unable-to-execute-mpich2-on-multiple-machines-on-ubuntu-12-04-hydu-sock-connect</a></p>
<p>Yet, another possible cause is a problem resolving the DNS
hostname:</p>
<a class="moz-txt-link-freetext" href="https://forums.suse.com/archive/index.php/t-6057.html">https://forums.suse.com/archive/index.php/t-6057.html</a><br>
<a class="moz-txt-link-freetext" href="https://www.slothparadise.com/running-mpi-common-mpi-troubleshooting-problems/">https://www.slothparadise.com/running-mpi-common-mpi-troubleshooting-problems/</a><br>
<p>Since /etc/hosts usually cannot be edited by a user, the cluster
administrator would have to fix the hosts file if that happens to
be the source of the problem.</p>
<div class="moz-cite-prefix">On 7/18/2018 6:07 PM, karima Physique
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAB25O4m5hjYT+6E2QQ_uia43fcp+-bbQ_DSQ9wbUKfP=rC=rTQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<div dir="ltr">Dear wien2k users:
<div><br>
</div>
<div>Using the folowing machines files : </div>
<div>lapw0:master:12</div>
<div><span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">dstart:master:12</span></div>
<div>
1:master:12</div>
<div>1:node1:12</div>
<div>
<span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">1:node2:12</span>
<br>
</div>
<div>......</div>
<div>the calculation works very well, but using the following
machines file:<br>
</div>
<div>
<div
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial">lapw0:master:12
<span
style="background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">node1:12
<span
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">node2:12</span>
</span></div>
<div
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial"><span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">dstart:master:12
<span
style="text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">node1:12
<span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">node2:12</span>
</span></span></div>
<div
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial">1:master:12</div>
<div
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial">1:node1:12</div>
<div
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial"><span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">1:node2:12</span><span> </span></div>
.......</div>
<div>I got the following error:<br>
</div>
<div><br>
</div>
<div>unable to get host adress calcul.local for (1)</div>
<div>
<span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">unable
to<span> </span></span> connect to server
<span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">calcul.local</span>
at port 44295 (chek for firewalls!)<br>
</div>
<div>we note that
<span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">calcul.local
is the host to connect to w2web.</span></div>
<div><span
style="background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">I
ask you any suggestions to solve this problem<br>
</span></div>
</div>
</blockquote>
</body>
</html>