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From "Ankit Singhal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-3974) Create index may issue a distributed dead lock due lack of handlers
Date Mon, 21 Aug 2017 11:05:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-3974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16135034#comment-16135034
] 

Ankit Singhal commented on PHOENIX-3974:
----------------------------------------

As PHOENIX-3994 is in, do you wanna update your patch accordingly [~sergey.soldatov]? is this
related/duplicate of PHOENIX-3995?

> Create index may issue a distributed dead lock due lack of handlers
> -------------------------------------------------------------------
>
>                 Key: PHOENIX-3974
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3974
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.11.0
>            Reporter: Sergey Soldatov
>            Assignee: Sergey Soldatov
>         Attachments: PHOENIX-3974.patch
>
>
> In PHOENIX-3360 we were trying to avoid using index rpc on client side, setting controller
manually in Indexer.  But after we moved index creating to server side there is another set
of RS-RS communication that comes from UngroupedAggregateRegionObserver with regular priority.
That may cause distributed dead lock when all handlers are occupied by index create scanners
for user table and inside they are trying to send index updates. To prevent it we need to
set controller in UngroupedAggregateRegionObserver in the similar way like we did in Indexer.




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