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https://issues.apache.org/jira/browse/WHIRR-488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13194340#comment-13194340
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Andrei Savu commented on WHIRR-488:
-----------------------------------

As far as I can see you are getting an InternalError from Amazon when starting 
/ requesting a bunch of spot instances: 

{noformat}
org.jclouds.aws.AWSResponseException: request POST 
https://ec2.us-east-1.amazonaws.com/ HTTP/1.1 failed with code 400, error: 
AWSError{requestId='19b7d163-0c51-4c1d-8447-947beff61dbc', requestToken='null', 
code='InternalError', message='An internal error has occurred', 
context='{Response=, Errors=}'}
{noformat}

We can't do that much as an workaround this except for failing faster. Thanks 
for reporting! 

                
> whirr hangs in certain cases when creating a spot-priced EC2 cluster
> --------------------------------------------------------------------
>
>                 Key: WHIRR-488
>                 URL: https://issues.apache.org/jira/browse/WHIRR-488
>             Project: Whirr
>          Issue Type: Bug
>    Affects Versions: 0.6.0
>         Environment: EC2, creating a cdh hadoop cluster
>            Reporter: Evan Pollan
>         Attachments: whirr.startup.hang.log
>
>
> In about 1 out of every 5-7 attempts, whirr will hang while creating a 
> spot-priced cluster in EC2.  The process just sits there, consuming no system 
> resources and writing nothing to stderr or stdout.  In each case, some number 
> of cluster nodes are up and running.
> This happened again to me today, and whirr was hung for about 4 hours.  As 
> usual, there were a bunch of errors logged while it was trying to create the 
> instances.  About 10 minutes in, though, whirr just went radio silent and 
> stayed that way until I killed it.
> I'll attached the output -- it looks similar to the other instances where 
> whirr has had this problem.

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