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http://jira.amdatu.org/jira/browse/AMDATUCASSANDRA-176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivo Ladage - van Doorn resolved AMDATUCASSANDRA-176.
----------------------------------------------------
Resolution: Fixed
Added monitor for r/w locks on the Keyspace -> ColumnFamily type map
> Excessive lock contention on CassandraClientServiceImpl caused by keyspace ->
> CF type map
> -----------------------------------------------------------------------------------------
>
> Key: AMDATUCASSANDRA-176
> URL: http://jira.amdatu.org/jira/browse/AMDATUCASSANDRA-176
> Project: Amdatu Cassandra
> Issue Type: Bug
> Components: Cassandra client
> Affects Versions: 0.2.2
> Reporter: Ivo Ladage - van Doorn
> Assignee: Ivo Ladage - van Doorn
> Fix For: 0.2.3
>
>
> The getColumnType method in CassandraClientServiceImpl is invoked from the PM
> to determine the type of the Column Family, for example in the getRowKeys,
> getValue and setValue methods. The getColumnType method is, as most of its
> methods, synchronized. When a tenant is added, a new keyspace is added and
> the addKeyspace method will hold the lock on this object. This blocks all
> calls to getValue and setValue, even for other tenants.
> The internal keyspace -> CF type map should use its own monitor for
> read/write locks, reducing lock contention.
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