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From "Eugene Koifman (JIRA)" <>
Subject [jira] [Updated] (HIVE-16361) Automatically kill runaway client processes
Date Thu, 13 Apr 2017 22:46:41 GMT


Eugene Koifman updated HIVE-16361:
    Summary: Automatically kill runaway client processes   (was: Automatically kill runaway
processes )

> Automatically kill runaway client processes 
> --------------------------------------------
>                 Key: HIVE-16361
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>          Components: Transactions
>    Affects Versions: 1.0.0
>            Reporter: Eugene Koifman
>            Priority: Critical
> HIVE-13249 added an enforceable limit on how many transactions can be opened concurrently
where the system starts to reject new work to prevent the system getting to a point where
it cannot manage the load.
> Another condition to guard against is a runaway process (which would usually be some
app (e.g. Storm) using Streaming Ingest API) that create a very large number of transactions
very quickly all of which immediately get aborted due to some misconfiguration.  This can
cause large amount of metatdata to accumulate in the ACID system slowing everything down and
causing instability.
> Now that we have TXNS.TXN_AGENT_INFO information we could probably use that refuse work
from a client even before we open any txns if it passes some "runaway client" heuristic.
> This is like an unintentional DOS attack

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