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From "Tellier Benoit (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAILBOX-210) A data race is possible with Cassandra UID generation
Date Wed, 21 Jan 2015 09:11:34 GMT
Tellier Benoit created MAILBOX-210:

             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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