Hi all, I use two threads to test lightweight transaction, each thread execute "insert into test_table(column1,column2) values (i, thread_id) if not exists" N times, and i is in the range of 0~N. When N is small, it is ok,some row inserted by thread 1 and others inserted by thread 2. but N is big, I will get TimedoutException(acknowledged_by:1, paxos_in_progress:true) and have two different results:
1) only one thread throw the exception, and this thread insert the value successfully; 2) both threads throw the exception, and no value inserted into the table. I except that some row in test_table inserted by thread 1 and others inserted by thread 2, when one thread insert a row has be in the table, it is just return and don't modify the row. I think that is lightweight transaction's function, But why I get the exception and how to avoid it. I try to enlarge cas_contention_timeout_in_ms in cassandra.yaml, but it does not work. my cassandra version is 2.0.3, and the cluster has two nodes with keypsace's replication_factor is 2. Best Regards Jim Xu
