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Posted to issues@servicecomb.apache.org by "Yin Xiang (JIRA)" <ji...@apache.org> on 2018/01/23 01:20:00 UTC

[jira] [Assigned] (SCB-277) [pack] persist index of last processed event to avoid concurrency and re-processing issue

     [ https://issues.apache.org/jira/browse/SCB-277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yin Xiang reassigned SCB-277:
-----------------------------

    Assignee: Yin Xiang

> [pack] persist index of last processed event to avoid concurrency and re-processing issue
> -----------------------------------------------------------------------------------------
>
>                 Key: SCB-277
>                 URL: https://issues.apache.org/jira/browse/SCB-277
>             Project: Apache ServiceComb
>          Issue Type: Improvement
>          Components: Saga
>            Reporter: Yin Xiang
>            Assignee: Yin Xiang
>            Priority: Major
>
> currently, when alpha is down, it starts from the first event till the last on restart.
> multiple alphas may process the same event at the same time, which results in concurrent update errors when persisting events as commands. it may not affect correctness, but does leave warning logs.
> persisting last processed event index can help solve the problems above.
>  



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