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Posted to commits@cassandra.apache.org by "Matthew F. Dennis (JIRA)" <ji...@apache.org> on 2010/06/30 00:18:51 UTC
[jira] Updated: (CASSANDRA-1191) Make Strategy classes fail if
asked to fulfil an impossible replication request
[ https://issues.apache.org/jira/browse/CASSANDRA-1191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matthew F. Dennis updated CASSANDRA-1191:
-----------------------------------------
Attachment: trunk-1191.txt
> Make Strategy classes fail if asked to fulfil an impossible replication request
> -------------------------------------------------------------------------------
>
> Key: CASSANDRA-1191
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1191
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Matthew F. Dennis
> Priority: Minor
> Fix For: 0.7
>
> Attachments: trunk-1191.txt
>
>
> I added to RSECT in CASSANDRA-1147,
> // TODO DSS is asked to provide a total of 6 replicas, but we never give it 6 endpoints.
> // thus we are testing undefined behavior, at best.
> This is easiest to cause in DSS but it can afflict other Strategies too.
> Let's update the ARS contract to state that calculateNaturalEndpoints (hence getNaturalEndpoints too) will throw IllegalStateException if more replicas are requested than the known endpoints (for DSS, this would apply on a per-DC basis) and amend the Strategy classes to check for this.
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