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From "David Alves (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (WHIRR-414) whirr can have a non-zero return code and unterminated (orphaned) host instances
Date Sun, 13 Nov 2011 00:17:51 GMT

    [ https://issues.apache.org/jira/browse/WHIRR-414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13149186#comment-13149186
] 

David Alves commented on WHIRR-414:
-----------------------------------

Andrei sorry for not loooking into this sooner.

Looks good, small nit: why not make load() return an empty cluster whenever there is nothing
to load instead of using tryLoadOrEmpty().

                
> whirr can have a non-zero return code and unterminated (orphaned) host instances
> --------------------------------------------------------------------------------
>
>                 Key: WHIRR-414
>                 URL: https://issues.apache.org/jira/browse/WHIRR-414
>             Project: Whirr
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 0.6.0
>         Environment: EC2, commandline whirr
>            Reporter: Paul Baclace
>            Assignee: Andrei Savu
>            Priority: Critical
>             Fix For: 0.7.0
>
>         Attachments: WHIRR-414-ignore-missing-instances-file.patch, WHIRR-414-ignore-missing-instances-file.patch,
WHIRR-414.patch, WHIRR-414.patch, WHIRR-414.patch, WHIRR-414.patch, WHIRR-414.patch
>
>
> Whirr can fail to completely start a cluster and indicates this with a non-zero return
code. In many (currently intermittent) partial failure scenarios, there are resources still
active (EC2 machine instances, in my experience) that are not cleaned up. 
> The log contains "IOException: Too many instance failed while bootstrapping!" when I
have seen orphaned nodes.
> A non-zero return code should guarantee that all resources are cleaned up.  Without this
post-condition, these failures require manual inspection and cleanup to stop useless expenses
(which is why I marked this bug critical; it needs to be addressed for any kind of cron job
triggered whirr).

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