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From "Stu Hood (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1218) 0.7 cannot read 0.6 system table
Date Wed, 23 Jun 2010 18:03:51 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12881796#action_12881796
] 

Stu Hood commented on CASSANDRA-1218:
-------------------------------------

Gary's patch is correct, in that it makes the filter rebuilding match up with the rest of
the codebase (disk-formatted-bytes in the filter).

But rather than storing disk-formatted-bytes in the bloom filter, we should probably store
the actual key bytes.

> 0.7 cannot read 0.6 system table
> --------------------------------
>
>                 Key: CASSANDRA-1218
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1218
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.7
>            Reporter: Jonathan Ellis
>            Assignee: Gary Dusbabek
>            Priority: Critical
>             Fix For: 0.7
>
>         Attachments: 0001-CFS-should-ignore-non-db-files.patch, 0002-use-diskformat-when-recreating-rowkey-bloom-filter.patch
>
>
> to reproduce:
> start w/ empty data, commitlog
> start 0.6
> kill it when it completes starting
> r/m commitlog (should have LocationInfo sstables already)
> start 0.7
> ERROR 12:39:18,593 Fatal exception during initialization
> org.apache.cassandra.config.ConfigurationException: Found system table files, but they
couldn't be loaded. Did you change the partitioner?
> 	at org.apache.cassandra.db.SystemTable.checkHealth(SystemTable.java:153)
> 	at org.apache.cassandra.thrift.CassandraDaemon.setup(CassandraDaemon.java:93)
> 	at org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.java:90)
> 	at org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:221)

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