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https://issues.apache.org/jira/browse/CASSANDRA-3488?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis resolved CASSANDRA-3488.
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Resolution: Cannot Reproduce
I remember you had some "dropping index didn't completely drop the index"
problems with this cluster dating back to 0.7.x (which sounds like
CASSANDRA-2619 to me, but there were a lot of index fixes in 0.7.5 and 0.7.6).
That's probably the root cause.
> Secondary indexes still around 3 months after deleting them
> -----------------------------------------------------------
>
> Key: CASSANDRA-3488
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3488
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.8.4
> Reporter: Jeremy Hanna
> Labels: secondary_index
>
> We had an issue where we lost the data directories of two nodes. So we
> re-bootstrapped those two nodes into the cluster and did the repair. During
> the repair, secondary indexes were built as evidenced both in compactionstats
> and in the filesystem. The problem is, we haven't had secondary indexes on
> any of our column families for about 3 months now. The history there is that
> we were on 0.7.6, deleted the secondary indexes on that version, and upgraded
> to 0.8.4 a bit later. It bootstrapped and repaired last night and this
> morning, but it's been a good 10 hours today of almost exclusively rebuilding
> secondary indexes that shouldn't be there.
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