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From "Tyler Hobbs (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-13180) Better handling of missing entries in system_schema.columns during startup
Date Thu, 02 Feb 2017 23:27:52 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-13180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tyler Hobbs updated CASSANDRA-13180:
------------------------------------
    Status: Patch Available  (was: Open)

Patch and pending test runs:

||branch||testall||dtest||
|[CASSANDRA-13180-3.0|https://github.com/thobbs/cassandra/tree/CASSANDRA-13180-3.0]|[testall|http://cassci.datastax.com/view/Dev/view/thobbs/job/thobbs-CASSANDRA-13180-3.0-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/thobbs/job/thobbs-CASSANDRA-13180-3.0-dtest]|
|[CASSANDRA-13180-3.11|https://github.com/thobbs/cassandra/tree/CASSANDRA-13180-3.11]|[testall|http://cassci.datastax.com/view/Dev/view/thobbs/job/thobbs-CASSANDRA-13180-3.11-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/thobbs/job/thobbs-CASSANDRA-13180-3.11-dtest]|
|[CASSANDRA-13180-trunk|https://github.com/thobbs/cassandra/tree/CASSANDRA-13180-trunk]|[testall|http://cassci.datastax.com/view/Dev/view/thobbs/job/thobbs-CASSANDRA-13180-trunk-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/thobbs/job/thobbs-CASSANDRA-13180-trunk-dtest]|

There were minor conflicts in the merges to 3.11 and trunk.

> Better handling of missing entries in system_schema.columns during startup
> --------------------------------------------------------------------------
>
>                 Key: CASSANDRA-13180
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13180
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Distributed Metadata
>            Reporter: Tyler Hobbs
>            Assignee: Tyler Hobbs
>             Fix For: 3.0.x, 3.x
>
>
> Like the error in CASSANDRA-12213 and CASSANDRA-12165, it's possible for {{system_schema.keyspaces}}
and {{tables}} to contain entries for a table while {{system_schema.columns}} has none.  This
produces an error during startup, and there's no way for a user to recover from this without
restoring from backups.
> Although this has been seen in the wild on one occasion, the cause is still not entirely
known.  (It may be due to a concurrent DROP TABLE and ALTER TABLE where a table property is
altered.)  Until we know the root cause, it makes sense to give users a way to recover from
that situation.



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