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Posted to commits@cassandra.apache.org by "Berenguer Blasi (Jira)" <ji...@apache.org> on 2023/06/06 04:51:00 UTC
[jira] [Updated] (CASSANDRA-18555) A new nodetool/JMX command that tells whether node's decommission failed or not
[ https://issues.apache.org/jira/browse/CASSANDRA-18555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Berenguer Blasi updated CASSANDRA-18555:
----------------------------------------
Change Category: Operability
Complexity: Normal
Assignee: Jaydeepkumar Chovatia
Status: Open (was: Triage Needed)
> A new nodetool/JMX command that tells whether node's decommission failed or not
> -------------------------------------------------------------------------------
>
> Key: CASSANDRA-18555
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18555
> Project: Cassandra
> Issue Type: Task
> Components: Observability/JMX
> Reporter: Jaydeepkumar Chovatia
> Assignee: Jaydeepkumar Chovatia
> Priority: Normal
>
> Currently, when a node is being decommissioned and if any failure happens, then an exception is thrown back to the caller.
> But Cassandra's decommission takes considerable time ranging from minutes to hours to days. There are various scenarios in that the caller may need to probe the status again:
> * The caller times out
> * It is not possible to keep the caller hanging for such a long time
> And If the caller does not know what happened internally, then it cannot retry, etc., leading to other issues.
> So, in this ticket, I am going to add a new nodetool/JMX command that can be invoked by the caller anytime, and it will return the correct status.
> It might look like a smaller change, but when we need to operate Cassandra at scale in a large-scale fleet, then this becomes a bottleneck and require constant operator intervention.
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