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From "Jon Haddad (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10619) disallow streaming operations while upgrading
Date Thu, 12 Nov 2015 18:53:11 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15002626#comment-15002626
] 

Jon Haddad commented on CASSANDRA-10619:
----------------------------------------

While I can't say for sure, my assumption is each nodes version would have to be sent as part
of gossip.  

Currently if you try to stream between major versions it just craps out and bites people hard,
so it's not like we're adding some ridiculous restriction to streaming.  It doesn't work -
so I'd rather prevent users from making a tragic mistake than allow them to keep screwing
up.

If you had 30 servers per rack x 30 racks, you should be able to upgrade 1 rack at a time.
 That shouldn't take weeks, maybe a couple days?  Running a mixed cluster for any significant
length of time is just asking for trouble.

> disallow streaming operations while upgrading
> ---------------------------------------------
>
>                 Key: CASSANDRA-10619
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10619
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jon Haddad
>
> Cassandra should prevent users from doing streaming operations in the middle of a cluster
upgrade.  



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