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https://issues.apache.org/jira/browse/WHIRR-649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13449120#comment-13449120
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Graham Gear commented on WHIRR-649:
-----------------------------------
I also note, that since a install_hadoop invoked install_cdh_hadoop script
includes a tarball paramater, it qualifies as not equal to a parameterless
install_cdh_hadoop statement and therefore results in 2 invocations of this
function, Eg:
{code:title=bootstrap-*.sh|borderStyle=solid}
install_oab_java || exit 1
install_cdh_hadoop -u
http://apache.osuosl.org/hadoop/common/hadoop-0.20.205.0/hadoop-0.20.205.0.tar.gz
|| exit 1
install_cdh_hadoop || exit 1
install_cm || exit 1
{code}
This patch protects against running this function twice, although there is a
bit of code smell around this.
> Make install_cdh_hadoop.sh idempotent, fast failing if already run
> ------------------------------------------------------------------
>
> Key: WHIRR-649
> URL: https://issues.apache.org/jira/browse/WHIRR-649
> Project: Whirr
> Issue Type: Improvement
> Affects Versions: 0.7.1
> Reporter: Graham Gear
> Attachments: WHIRR-649.patch
>
>
> Currently, install_cdh_hadoop.sh does not check it has already run and
> return, unlike install_hadoop.sh.
> This is inefficient for services that would like to install CDH components
> which have often already been installed (eg Cloudera Manager).
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