Create/remove user sometimes fails (concurrency issue?)
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                 Key: AMDATU-299
                 URL: http://jira.amdatu.org/jira/browse/AMDATU-299
             Project: Amdatu
          Issue Type: Bug
          Components: Amdatu OpenSocial
    Affects Versions: 0.1.0
            Reporter: Ivo Ladage - van Doorn
             Fix For: 0.1.0


When you run the UserAdmin JMeter build plan (available in /etc directory), 
about 0,13% of the REST calls to remove a group fails with the error below.

[2011-02-11 11:01:20] ERROR: 
[org.ops4j.pax.useradmin.service.internal.UserAdminImpl] NotFoundException()
Context information:
        keyspace     = 'Default'
        columnfamily = 'Role'
        rowkey       = 'group_jmetergroup4846'
        supercolumn  = 'Members'
        column       = 'basic'

Context information:
        keyspace     = 'Default'
        columnfamily = 'Role'
        rowkey       = 'group_jmetergroup4846'
        supercolumn  = 'Members'
        column       = 'basic'

This may be a concurrency issue, but Cassandra's "eventual consistency" could 
also be the problem.

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