[jira] [Created] (CASSANDRA-16290) Consistency can be violated when bootstrap or decommission is resumed after node restart

["Paulo Motta (Jira)" <ji...@apache.org>]

Paulo Motta created CASSANDRA-16290:
---------------------------------------

             Summary: Consistency can be violated when bootstrap or decommission is resumed after node restart
                 Key: CASSANDRA-16290
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16290
             Project: Cassandra
          Issue Type: Bug
          Components: Consistency/Bootstrap and Decommission
            Reporter: Paulo Motta


Since CASSANDRA-12008, successfully transferred ranges during decommission are saved on the {{system.transferred_ranges}} table. This allow skipping ranges already transferred when a failed decommission is retried with {{nodetool decommission}}.

If instead of resuming the decommission, an operator restarts the node, waits N minutes and then performs a new decommission, the previously transferred ranges will be skipped during streaming, and any writes received by the decommissioned node during these N minutes will not be replicated to the new range owner, what violates consistency.

This issue is analogous to the issue mentioned [on this comment|https://issues.apache.org/jira/browse/CASSANDRA-8838?focusedCommentId=16900234&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16900234] for resumable bootstrap (CASSANDRA-8838).

In order to prevent consistency violations we should clear the {{system.transferred_ranges}} state during node restart, and maybe a system property to disable it. While we're at this, we should change the default of {{-Dcassandra.reset_bootstrap_progress}} to {{true}} to clear the {{system.available_ranges}} state by default when a bootstrapping node is restarted.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org
For additional commands, e-mail: commits-help@cassandra.apache.org