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https://issues.apache.org/jira/browse/SPARK-542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13967185#comment-13967185
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Mridul Muralidharan commented on SPARK-542:
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Spark uses only hostnames - not ip's.
Even for hostnames, it should ideally pick only the canonical hostname - not
the others.
This was done by design in 0.8 ... try to find if multiple host names/ip's are
all referring to the same physical host/container is fraught with too many
issues.
> Cache Miss when machine have multiple hostname
> ----------------------------------------------
>
> Key: SPARK-542
> URL: https://issues.apache.org/jira/browse/SPARK-542
> Project: Spark
> Issue Type: Bug
> Reporter: frankvictor
>
> HI, I encountered a weird runtime of pagerank in last few day.
> After debugging the job, I found it was caused by the DNS name.
> The machines of my cluster have multiple hostname, for example, slave 1 have
> name (c001 and c001.cm.cluster)
> when spark adding cache in cacheTracker, it get "c001" and add cache use it.
> But when schedule task in SimpleJob, the msos offer give spark
> "c001.cm.cluster".
> so It will never get preferred location!
> I thinks spark should handle the multiple hostname case(by using ip instead
> of hostname, or some other methods).
> Thanks!
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