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https://issues.apache.org/jira/browse/CASSANDRA-15399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16969477#comment-16969477
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David Capwell commented on CASSANDRA-15399:
-------------------------------------------
I created a PR to get early feedback, but the code is not ready for merge at
all (needs to be cleaned up, and go through a lot more testing).
This provides two new virtual tables: repairs, and repair_validations.
repairs is called on the coordinator and provides a unified view of the
coordinator and participant's state. I added new verbs VALIDATION_STATUS_REQ
and VALIDATION_STATUS_RSP to allow this table to get access to the validation
in-flight (later coordinator could use this to make sure validations are
running and making progress).
repair_validations runs on the participants and shows the progress of the
validation task; this table is similar to
{code:java}
nodetool compactionstats
{code}
Open Issues:
* if a validation is detected on a host, be able to backtrack to the coordinator
* sync progress is not tracked, desirable to have repair_sync table once that
is done
> Add ability to track state in repair
> ------------------------------------
>
> Key: CASSANDRA-15399
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15399
> Project: Cassandra
> Issue Type: Improvement
> Components: Consistency/Repair
> Reporter: David Capwell
> Assignee: David Capwell
> Priority: Normal
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> To enhance the visibility in repair, we should add in-memory objects that can
> be exposed via JMX and virtual tables to show the state of the coordinator,
> and validations (leaving sync out for now).
> These objects should expose the timing (create, start, complete), current
> state (enum specific to the entity), and progress estimate (% complete);
> along with any entity specific information useful.
> To help with growth, ActiveRepairService should periodically cleanup
> completed state after a configurable interval.
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