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https://issues.apache.org/jira/browse/IGNITE-15732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17432487#comment-17432487
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Aleksey Plekhanov commented on IGNITE-15732:
--------------------------------------------

{{Platform .NET (Windows)}} - failed on master too, not related to this patch.

[~ivandasch], can you please have a look at the patch?

> Thin client: Tx can fail if there are concurrent tx rollbacks by timeout
> ------------------------------------------------------------------------
>
>                 Key: IGNITE-15732
>                 URL: https://issues.apache.org/jira/browse/IGNITE-15732
>             Project: Ignite
>          Issue Type: Bug
>            Reporter: Aleksey Plekhanov
>            Assignee: Aleksey Plekhanov
>            Priority: Major
>              Labels: ise
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Due to race between timeout worker and client-connector workers there can be 
> situations when some transaction is processed by client-connector worker and 
> concurrently rolled back by timeout worker. In this case, {{threadMap}} can 
> still contain the reference to this transaction but the transaction state is 
> already set to "ROLLED_BACK", for such a state client-connector worker does 
> not suspend the transaction and can proceed to the next request, which uses 
> another transaction. When resuming this second transaction there is an 
> exception thrown, since {{IgniteTxManager#threadMap}} is not cleared yet for 
> the current worker thread:
> {noformat}
> org.apache.ignite.client.ClientException: Ignite failed to process request 
> [103]: Thread already has started a transaction. (server status code 
> [1]){noformat}
>  



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