[infinispan-dev] Write Skew issue (versioning)
Mircea Markus
mircea.markus at jboss.com
Fri Jan 27 11:44:52 EST 2012
Looks like a bug, mind creating a JIRA for it?
On 24 Jan 2012, at 21:45, Pedro Ruivo wrote:
> 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
>>
>> 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
>>> _______________________________________________
>>> infinispan-dev mailing list
>>> infinispan-dev at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>>
>>
>>
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