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https://issues.apache.org/jira/browse/CASSANDRA-3465?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sylvain Lebresne resolved CASSANDRA-3465.
-----------------------------------------
Resolution: Not A Problem
> Wrong counters values when RF > 1
> ---------------------------------
>
> Key: CASSANDRA-3465
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3465
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.0.0
> Environment: Amazon EC2 (cluster of 5 t1.micro), phpCassa 0.8.a.2
> Reporter: Alain RODRIGUEZ
> Assignee: Sylvain Lebresne
> Priority: Critical
> Attachments: 0001-add-debug-infos.patch, logServer0.log,
> logServer0_cl_all.log, logServer1.log, logServer1_cl_all.log, logServer2.log,
> logServer2_cl_all.log
>
>
> I have got a CF that contains many counters of some events. When I'm at RF =
> 1 and simulate 10 events, they are well counted.
> However, when I switch to a RF = 3, my counter show a wrong value that
> sometimes change when requested twice (it can return 7, then 5 instead of 10
> all the time).
> I first thought that it was a problem of CL because I seem to remember that I
> read once that I had to use CL.One for reads and writes with counters. So I
> tried with CL.One, without success...
> /*-------------------------------------------------- CODE
> -------------------------------------------------------*/
> $servers = array("ec2-xxx-xxx-xxx-xxx.eu-west-1.compute.amazonaws.com",
> "ec2-yyy-yyy-yyy-yyy.eu-west-1.compute.amazonaws.com",
> "ec2-zzz-zzz-zzz-zzz.eu-west-1.compute.amazonaws.com",
> "ec2-aaa-aaa-aaa-aaa.eu-west-1.compute.amazonaws.com",
> "ec2-bbb-bbb-bbb-bbb.eu-west-1.compute.amazonaws.com");
> $pool = new ConnectionPool("mykeyspace", $servers);
> $stats_test = new ColumnFamily($pool, 'stats_test',
> $read_consistency_level=cassandra_ConsistencyLevel::ONE,
> $write_consistency_level=cassandra_ConsistencyLevel::ONE);
>
> $time = date( 'YmdH', time());
>
> for($i=0; $i<10; $i++){
> for($c=1; $c<=3; $c++){
> $stats_test->add($c, $time.':test');
> }
> $counts = $stats_test->multiget(array(1,2,3));
> echo('Counter1: '.$counts[1][$time.':test']."\n");
> echo('Counter2: '.$counts[2][$time.':test']."\n");
> echo('Counter3: '.$counts[3][$time.':test']."\n\n");
> }
> /*-------------------------------- END OF CODE
> -------------------------------------------------------------------------*/
> /*-------------------------------------------------- OUTPUT
> ------------------------------------------------------------*/
> Counter1: 1
> Counter2: 1
> Counter3: 1
> Counter1: 2
> Counter2: 2
> Counter3: 2
> Counter1: 3
> Counter2: 3
> Counter3: 3
> Counter1: 3
> Counter2: 4
> Counter3: 4
> Counter1: 4
> Counter2: 5
> Counter3: 3
> Counter1: 5
> Counter2: 6
> Counter3: 3
> Counter1: 6
> Counter2: 7
> Counter3: 4
> Counter1: 4
> Counter2: 8
> Counter3: 7
> Counter1: 5
> Counter2: 9
> Counter3: 8
> Counter1: 8
> Counter2: 4
> Counter3: 9
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