[jira] [Updated] (WHIRR-517) Add a retry loop around apt-get and yum commands to overcome transient errors

["Karel Vervaeke (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/WHIRR-517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Karel Vervaeke updated WHIRR-517:
---------------------------------

    Attachment: WHIRR-517-evaluation.patch

Attached a patch with proposed implementation.
It adds 3 functions: a generic 'retry' function, 'retry_apt_get' and 'retry_yum'.
For now, I've only changed the zookeeper-cdh implementation for evaluation. If no-one forsees  major problems i'll start replacing all apt-get and yum calls.

I had to change the <filtering> in the pom because it would mess up expressions like $((tries-1)). (This also explains why JAVA_HOME wasn't being set properly).
                
> Add a retry loop around apt-get and yum commands to overcome transient errors
> -----------------------------------------------------------------------------
>
>                 Key: WHIRR-517
>                 URL: https://issues.apache.org/jira/browse/WHIRR-517
>             Project: Whirr
>          Issue Type: Improvement
>            Reporter: Karel Vervaeke
>         Attachments: WHIRR-517-evaluation.patch
>
>
> Often, installation on one or more nodes fails because of transient errors
> (mostly failed connection attempts).
> Therefore we should make use of command's built-in retry options and/or add our own retry loops.

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