[infinispan-dev] Write Skew issue (versioning)

[Pedro Ruivo]

Hi,

yes I have the versioning enabled. Like you said, I've posted in the 
forum too [1].

btw, the ISPN config is here [2]

[1] -- https://community.jboss.org/thread/177846
[2] -- http://pastebin.com/UCxGXw3K

Cheers,
Pedro

On 24-01-2012 19:15, Mircea Markus wrote:
> Hi Pedro and thanks for reporting this.
> Do you have versioning enabled? Otherwise the writeSkewCheck won't be 
> performed at commit time.
> If you do have versioning enabled, may I suggest to take this on the 
> user forums[1] - this way it would be easier for other users that have 
> the same problem to find it.
>
> [1] 
> https://community.jboss.org/community/infinispan?view=discussions&start=0 
> <https://community.jboss.org/community/infinispan?view=discussions&start=0>
>
> On 24 Jan 2012, at 18:42, Pedro Ruivo wrote:
>> Hi,
>>
>> I think I have spotted a problem with the write skew check
>> implementation based on versioning.
>>
>> I've made this test to confirm:
>>
>> I have a global counter that is incremented concurrently by two
>> different nodes, running ISPN with Repeatable Read with write skew
>> enabled. I expected that each successfully transaction will commit a
>> different value.
>>
>> In detail, each node do the following:
>>
>> beginTx
>> Integer count = cache.get("counter");
>> count = count + 1;
>> cache.put("counter", count)
>> commitTx
>>
>> To avoid errors, I've run this test on two ISPN versions: 5.1.0.CR4 and
>> 5.0.1.Final. In 5.0.1.Final, it works as expected. However, on 5.1.0.CR4
>> I have a lot of repeated values. After a first check at the code, I've
>> the impression that the problem may be due to that the version numbers
>> of the keys for which the write skew check should be run is not sent
>> with the prepare command.
>>
>> Cheers,
>> Pedro Ruivo
>> _______________________________________________
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>> infinispan-dev at lists.jboss.org <mailto:infinispan-dev at lists.jboss.org>
>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>
>
>
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