[jira] [Resolved] (RATIS-182) Leader should wait for the log entries to be appended and synced

["Mukul Kumar Singh (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/RATIS-182?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mukul Kumar Singh resolved RATIS-182.
-------------------------------------
    Resolution: Not A Problem

Thanks for the explanation [~szetszwo], I understand the solution discussed. No change is needed in this case. The state machine implementation will be able to solve this issue. Marking this as resolved.

> Leader should wait for the log entries to be appended and synced
> ----------------------------------------------------------------
>
>                 Key: RATIS-182
>                 URL: https://issues.apache.org/jira/browse/RATIS-182
>             Project: Ratis
>          Issue Type: Bug
>            Reporter: Mukul Kumar Singh
>            Assignee: Mukul Kumar Singh
>
> Leader currently doesn't wait for the transaction to be appended to the log. This can lead to a situation where {{applyTransaction}} can be called before {{writeStateMachineData}} finishes.
> {code}
>   public long append(long term, TransactionContext operation,
>       ClientId clientId, long callId) throws StateMachineException {
> ...
> ...
> ...
>       appendEntry(e) <---- This should be synced
>       operation.setLogEntry(e);
>       return nextIndex;
>     }
>   }
> {code}



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