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https://issues.apache.org/jira/browse/CASSANDRA-17870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17609606#comment-17609606
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Francisco Guerrero commented on CASSANDRA-17870:
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{quote}
Why prefer excluding the local DC instead of setting a source DC?
{quote}
[~yifanc] This would be for the case where you are building out a new DC, and
your local [new] DC nodes do not have data yet. There's already a way to
specify a *{{src-dc-name}}* (which can be the local DC)
[see|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/tools/nodetool/Rebuild.java#L30].
> nodetool/rebuild: Add flag to exclude nodes from local datacenter
> -----------------------------------------------------------------
>
> Key: CASSANDRA-17870
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17870
> Project: Cassandra
> Issue Type: Improvement
> Components: Tool/nodetool
> Reporter: Saranya Krishnakumar
> Assignee: Saranya Krishnakumar
> Priority: Normal
> Attachments: fix_nodetool_rebuild.diff
>
>
> During expansion by Dc, when we issue nodetool/rebuild from new dc to rebuild
> the data from other DCs. If src-dc is not passed explicitly, then C* tries to
> rebuild the data from the same (new dc) dc.
> We don’t exclude other nodes in the same DC. Only down sources and the local
> node itself are excluded.
> ```
> // We're _always_ filtering out a local node and down sources
> addSourceFilter(new
> RangeStreamer.FailureDetectorSourceFilter(failureDetector));
> addSourceFilter(new RangeStreamer.ExcludeLocalNodeFilter());
> ```
> We should fix nodetool/rebuild to exclude the local DC (from where we’re
> executing the command) while issuing nodetool/rebuild without passing src dc
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