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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4843) When upgrading from 1.1.6 to 1.20 change in partitioner causes nodes not to start
Date Mon, 22 Oct 2012 21:16:14 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13481806#comment-13481806
] 

Jonathan Ellis commented on CASSANDRA-4843:
-------------------------------------------

bq. maybe it's time to change the behavior so that if a partitioner is saved in the system
table, we use that

Partitioner is saved per-sstable so we can do this panic doublecheck, but you have to know
(or think you know) the partitioner before you can actually open up a system table.  I could
be wrong, but I don't think it's a quick fix.

In the meantime, I've updated the comments and error message in 8f3d9b8371fa7c5dea83d45d83ec7fe4911a96c0.
                
> When upgrading from 1.1.6 to 1.20 change in partitioner causes nodes not to start
> ---------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-4843
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4843
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Edward Capriolo
>             Fix For: 1.2.0 beta 2
>
>
> ERROR 10:17:20,341 Cannot open /home/edward/cassandra/data/system/schema_keyspaces/system-schema_keyspaces-hf-1
because partitioner does not match org.apache.cassandra.dht.RandomPartitioner != org.apache.cassandra.dht.Murmur3Partitioner
> This is because 1.2 has a new default partitioner, why are we changing the default? Is
this wise? The current partitioner has been rock solid for years. 
> Should the previously known partition be stored in the schema like the previously know
seed nodes, and schema?

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