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http://jira.amdatu.org/jira/browse/AMDATUCASSANDRA-179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12950#comment-12950
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Ivo Ladage - van Doorn commented on AMDATUCASSANDRA-179:
--------------------------------------------------------
The InspectKeyspaceColumnFamilyThread inspects the Cassandra scheme each X
seconds. As soon as it detected any change in the scheme with the last time it
checked it, it loops over all keyspaces and registers a new CPM for this
keyspace if is not yet available. This check is implemented as follows:
String filter = "(" + CassandraPersistenceManager.KEYSPACE_AWARE_KEY + "=" +
keyspace + ")";
ServiceReference[] servRefs =
m_context.getAllServiceReferences(CassandraPersistenceManager.class.getName(),
filter);
if (servRefs == null || servRefs.length == 0) {
// No Cassandra persistence manager available for this keyspace, register it
now
m_pmFactory.createCassandraPersistenceManager(keyspace);
}
The CassandraPersistenceManager is however started asynchronously. So it is
possible (and this is what happens) that the inspector thread triggers the
above code snippet again before the previously registered service is started.
> HectorCassandraPersistenceManagerImpl service instantiated twice for each
> tenant
> --------------------------------------------------------------------------------
>
> Key: AMDATUCASSANDRA-179
> URL: http://jira.amdatu.org/jira/browse/AMDATUCASSANDRA-179
> Project: Amdatu Cassandra
> Issue Type: Bug
> Components: Cassandra client - Persistence Manager
> Affects Versions: 0.2.2
> Reporter: Ivo Ladage - van Doorn
> Assignee: Ivo Ladage - van Doorn
> Fix For: 0.2.3
>
>
> When adding a tenant, two new instances of the
> HectorCassandraPersistenceManagerImpl service are created. After a little
> investigation it seems to be caused by the fact that
> InspectKeyspaceColumnFamilyThread invokes the onKeyspaceAdded twice.
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