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https://issues.apache.org/jira/browse/SPARK-6105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-6105.
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Resolution: Won't Fix
> enhance spark-ganglia to support redundant gmond addresses setting in ganglia
> unicast mode
> ------------------------------------------------------------------------------------------
>
> Key: SPARK-6105
> URL: https://issues.apache.org/jira/browse/SPARK-6105
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.2.1
> Reporter: Fuqing Yang
> Priority: Minor
>
> 1 why do it?
> when using spark-ganglia with ganglia unicast mode, I found it has single
> point of failure in gmond setting.
> we can not set *.sink.ganglia.host to localhost but only to a designated
> gmond address because gmond do not forward the metrics from spark
> GangliaSink. This problem can found in ganglia maillist:
> [Ganglia-general] Gmond forward messages
> http://sourceforge.net/p/ganglia/mailman/message/30268666/
> [Ganglia-general] gmond forwarding
> http://sourceforge.net/p/ganglia/mailman/message/28290307/
> So, in ganglia unicast mode, we may missing the metrics if the designated
> gmond went wrong.
> 2 how to resolve this SPOF
> add new parameter *.sink.ganglia.servers in conf/metrics.properties.
> eg:
> *.sink.ganglia.servers=host1:port1, host2:port2
> if enabled spark ganglia sink, use GangliaSink to parse
> *.sink.ganglia.servers to construct redundant GangliaReporters.
> for backend compatibility, preserve the old parameters *.sink.ganglia.host,
> *.sink.ganglia.port, If users do not use *.sink.ganglia.servers, give a
> warning, and the old parameters work.
> 3 problems introduced.
> none
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