[jira] [Updated] (CASSANDRA-17870) nodetool/rebuild: C* rebuilds from local (new dc) dc nodes if src-dc is not passed

["Saranya Krishnakumar (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-17870?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Saranya Krishnakumar updated CASSANDRA-17870:
---------------------------------------------
    Change Category: Operability
         Complexity: Low Hanging Fruit
        Component/s: Tool/nodetool
             Status: Open  (was: Triage Needed)

> nodetool/rebuild: C* rebuilds from local (new dc) dc nodes if src-dc is not passed
> ----------------------------------------------------------------------------------
>
>                 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
>
> 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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