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https://issues.apache.org/jira/browse/SCB-909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16628423#comment-16628423
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ASF GitHub Bot commented on SCB-909:
------------------------------------
coveralls edited a comment on issue #315: SCB-909 Add fail fast mechanism when
all alpha is unreachable.
URL:
https://github.com/apache/incubator-servicecomb-saga/pull/315#issuecomment-424257835
[](https://coveralls.io/builds/19196100)
Coverage increased (+0.03%) to 91.622% when pulling
**89842ab1bc01482191cfa3f0a6f69288d553d22f on cherrylzhao:master** into
**5350a86c0e3137db50db305d2788de2b3f357960 on apache:master**.
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> Add fault tolerance for service comb TCC
> ----------------------------------------
>
> Key: SCB-909
> URL: https://issues.apache.org/jira/browse/SCB-909
> Project: Apache ServiceComb
> Issue Type: New Feature
> Components: Saga
> Affects Versions: saga-0.3.0
> Reporter: cherrylzhao
> Assignee: cherrylzhao
> Priority: Major
> Fix For: saga-0.3.0
>
>
> TCC fault tolerance incude following point.
> # omega can switch to another available alpha when sending message failed.
> # if omega resend logic (different alpha) failed, omega can rollback local
> data automatically.
> # alpha do resend logic (same omega) when ACK failed, if resend failed, dirty
> data can left in database, this will be handled by scanner.
> # design transaction timeout mechanics, if scanner found event won't
> completed within expected time, sending componsate command to omega, it has
> different type compare with normal.
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