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<p style="margin-top: 0px; margin-bottom: 0px;">​Thought I'd follow up on this since the same problem hit again. After looking closer I realize now that the instance ID it's referring to in the 'instance has no alias' message is actually a development system
which I recently assigned the running clusters security group to (@sc-bid) among other groups. Removing the security group form all instances not created by starcluster immediately corrected the problem so I assume starcluster uses the security group to query
its nodes and since no alias was assigned to this foreign instance it bailed. ​<br>
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<p style="margin-top: 0px; margin-bottom: 0px;">John<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> starcluster-bounces@mit.edu <starcluster-bounces@mit.edu> on behalf of Lilley, John F. <johnbot@caltech.edu><br>
<b>Sent:</b> Wednesday, February 11, 2015 6:28 PM<br>
<b>To:</b> starcluster@mit.edu<br>
<b>Subject:</b> [StarCluster] New problem - instance has no alias. us-west-2b</font>
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<p style="margin-top: 0px; margin-bottom: 0px;">Hi All,​<br>
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<p style="margin-top: 0px; margin-bottom: 0px;">I starting running into trouble a few days ago with my Starcluster instances running in us-west-2b (Oregon) where after a day or two (most likely after the load balancer attempts to add nodes to accommodate jobs)
all interaction with the cluster via starclusters management commands results in a "!!! ERROR - instance i-8ac59480 has no alias" error message. As far I know nothing has changed on my end. <br>
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<p style="margin-top: 0px; margin-bottom: 0px;">Fresh starcluster instances were successfully relaunched using the most current release only to have them break again with the same error message. Trolling the starcluster mailing list archives resulted in a thread
from 2013 that suggested that AWS made some temporary changes in the way userdata was handled in some regions that eventually resolved itself. <a href="http://star.mit.edu/cluster/mlarchives/1985.html" id="LPlnk655997">http://star.mit.edu/cluster/mlarchives/1985.html</a></p>
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starcluster.mbox.out: Re: Multiple node cluster problems</div>
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StarCluster Mailing List Archive</div>
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<p style="margin-top: 0px; margin-bottom: 0px;">Hoping that someone has run into this problem and has some advice to share. <br>
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<p style="margin-top: 0px; margin-bottom: 0px;">John<br>
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