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Posted to dev@ignite.apache.org by VeenaMithare <v....@cmcmarkets.com> on 2020/10/17 11:28:56 UTC

Continuous query not transactional ?

Hello team,

This is in continuation to these posts on the ignite users 

http://apache-ignite-users.70518.x6.nabble.com/Continuous-query-not-transactional-td34270.html
and 
http://apache-ignite-users.70518.x6.nabble.com/Lag-before-records-are-visible-after-transaction-commit-tp33787p33861.html

Does this mean we could get dirty reads as updates in continuous query ?
i.e. for eg if the code is as below:
1. Start transaction  
2. update records of cache a
3. update records of cache b
4. update records for cache c
5. commit

if update of cache a succeeds , but update of cache b fails, will the local
listener for continuous query for 'cache a' get an update ?

regards,
Veena.





--
Sent from: http://apache-ignite-developers.2346864.n4.nabble.com/

Re: Continuous query not transactional ?

Posted by Ivan Pavlukhin <vo...@gmail.com>.

Hi Veena,

As far as I know, CQ listeners should not be notified about
non-committed writes. I suppose that it is possible to reproduce a
described scenario, what does it show in practice?

Also it is important to know that all participating caches should be
TRANSACTIONAL and "update of cache b fails" possibly does not mean
that a transaction is rolled back.

2020-10-17 14:28 GMT+03:00, VeenaMithare <v....@cmcmarkets.com>:
> Hello team,
>
> This is in continuation to these posts on the ignite users
>
> http://apache-ignite-users.70518.x6.nabble.com/Continuous-query-not-transactional-td34270.html
> and
> http://apache-ignite-users.70518.x6.nabble.com/Lag-before-records-are-visible-after-transaction-commit-tp33787p33861.html
>
> Does this mean we could get dirty reads as updates in continuous query ?
> i.e. for eg if the code is as below:
> 1. Start transaction
> 2. update records of cache a
> 3. update records of cache b
> 4. update records for cache c
> 5. commit
>
> if update of cache a succeeds , but update of cache b fails, will the local
> listener for continuous query for 'cache a' get an update ?
>
> regards,
> Veena.
>
>
>
>
>
> --
> Sent from: http://apache-ignite-developers.2346864.n4.nabble.com/
>


-- 

Best regards,
Ivan Pavlukhin