You don't have any syntax in your application anywhere such as:
UPDATE data SET field5 = field5 + [ 1,2,3 ] WHERE field1=<x>...;
Just a quick idempotency check :)
On Wed, Nov 25, 2015 at 9:16 AM, Jack Krupansky <jack.krupan...@gmail.com>
wrote:
> Is the data corrupted exactly the same way on all three nodes and in both
> data centers, or just on one or two nodes or in only one data center?
>
> Are both columns doubled in the same row, or only one of them in a
> particular row?
>
> Does sound like a bug though, worthy of a Jira ticket.
>
> -- Jack Krupansky
>
> On Wed, Nov 25, 2015 at 4:05 AM, Ngoc Minh VO <ngocminh...@bnpparibas.com>
> wrote:
>
>> Hello all,
>>
>>
>>
>> We encounter an issue on our Production environment that cannot be
>> reproduced on Test environment: list<T> (T = double or text) value is
>> randomly “multiplied” by 2 (i.e. value sent to C*= [a, b, c], value stored
>> in C* = [a, b, c, a, b, c]).
>>
>>
>>
>> I know that it sounds weird but we just want to know whether it is a
>> known issue (found nothing with Google…). We are working on a small dataset
>> to narrow down issue with log data and maybe create a ticket in for
>> DataStax Java Driver or Cassandra teams.
>>
>>
>>
>> Cassandra v2.0.14
>>
>> DataStax Java Driver v2.1.7.1
>>
>> OS RHEL6
>>
>> Prod Cluster topology = 16 nodes over 2 datacenters (RF = 3 per DC)
>>
>> UAT Cluster topology = 6 nodes on 1 datacenter (RF = 3)
>>
>>
>>
>> The only difference between Prod and UAT cluster is the multi-datacenter
>> mode on Prod one.
>>
>> We do not insert twice the same data on the same column of any specific
>> row. All inserts/updates are idempotent!
>>
>>
>>
>> Data table:
>>
>> CREATE TABLE data (
>>
>> field1 text,
>>
>> field2 int,
>>
>> field3 text,
>>
>> field4 double,
>>
>> field5 list<double>, -- randomly having corrupted data, containing
>> [1, 2, 3, 1, 2, 3] instead of [1, 2, 3]
>>
>> field6 text,
>>
>> field7 list<text>, -- randomly having corrupted data, containing
>> [a, b, c, a, b, c] instead of [a, b, c]
>>
>> PRIMARY KEY ((field1, field2), field3)
>>
>> ) WITH compaction = { 'class' : 'LeveledCompactionStrategy' };
>>
>>
>>
>> Thanks in advance for your help.
>>
>> Best regards,
>>
>> Minh
>>
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