Tellier Benoit created MAILBOX-210:
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             Summary: A data race is possible with Cassandra UID generation
                 Key: MAILBOX-210
                 URL: https://issues.apache.org/jira/browse/MAILBOX-210
             Project: James Mailbox
          Issue Type: Bug
            Reporter: Tellier Benoit


Nothing as critical as MAILBOX-209 but there is a race condition if the UID 
current value is null.

If so we set the value to one without checking if the value was updated.

This may cause duplicated UID for UID 1, and possible message loss ( as the 
primary key is the pair of the mailbox ID and the message UID ). We definitly 
don't want that to happen.

Solving this bug is easy : we should also use conditionnal updates when UID is 
equal to 0.



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