[
https://issues.apache.org/jira/browse/CASSANDRA-8049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14513859#comment-14513859
]
Sam Tunnicliffe commented on CASSANDRA-8049:
--------------------------------------------
Fair enough, this is a good opportunity to clean up some of that existing
stuff. I've pushed another commit to the branch addressing all of the above
comments.
> Explicitly examine current C* state on startup to detect incompatibilities
> before upgrade
> -----------------------------------------------------------------------------------------
>
> Key: CASSANDRA-8049
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8049
> Project: Cassandra
> Issue Type: Bug
> Reporter: Aleksey Yeschenko
> Assignee: Sam Tunnicliffe
> Fix For: 3.0
>
> Attachments: 8049-v2.txt, 8049.txt
>
>
> Unfortunately, we cannot rely on users reading, and following, NEWS.txt
> before upgrading. People don't read, or ignore it, and sometimes have issues
> as the result (see CASSANDRA-8047, for example, and I know of several cases
> like that one).
> We should add an explicit compatibility check on startup, before we modify
> anything, or write out sstables with the new format. We should fail and
> complain loudly if we detect a skipped upgrade step.
> We should also snapshot the schema tables before attempting any conversions
> (since it's not uncommon to make schema modifications as part of the upgrade).
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
