[jira] [Commented] (DRILL-4681) ChannelClosedException causes all queries which are communicating on that channel to fail

["Rahul Challapalli (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-4681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15924753#comment-15924753 ] 

Rahul Challapalli commented on DRILL-4681:
------------------------------------------

Your explanation makes sense. 

I have observed a few fragments which have completed but the query itself failed. It could be the case that for the failed queries, there were other fragments which were sending batches through the channel when this issue happened. So we failed those fragments and the corresponding query as well

> ChannelClosedException causes all queries which are communicating on that channel to fail 
> ------------------------------------------------------------------------------------------
>
>                 Key: DRILL-4681
>                 URL: https://issues.apache.org/jira/browse/DRILL-4681
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Flow, Execution - RPC
>    Affects Versions: 1.7.0
>            Reporter: Rahul Challapalli
>
> commit # : 09b262776e965ea17a6a863801f7e1ee3e5b3d5a
> Below is what I am describing:
>     1. One of the fragments cause a channel closed exception (due to an OOM or some other condition)
>     2. Drill fails all other fragments which are running at that time even though the fragments themselves eventually run to completion. At a high concurrency this could lead a lot of query failures.



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