Suguru Namura created CASSANDRA-6893:
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             Summary: Updates fails with conditional statement
                 Key: CASSANDRA-6893
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6893
             Project: Cassandra
          Issue Type: Bug
         Environment: Ubuntu Precise 64bit / Cassandra 2.0.6
            Reporter: Suguru Namura
         Attachments: ConcurrentCASUpdate.java

After updated to 2.0.6, I have encountered the strange behavior of conditional 
updates.

When I executed CQL like UPDATE test SET value = ? WHERE id = ? IF value = ? in 
concurrent, sometimes cassandra returns true even if value is not satisfied the 
condition.

I have attached the program which reproduce this issue. The program works fine 
in cassandra 2.0.5. But it seems that resets values while execution in 2.0.6.



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