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From "Eugene Koifman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-16361) Automatically kill runaway processes
Date Mon, 03 Apr 2017 20:35:41 GMT
Eugene Koifman created HIVE-16361:
-------------------------------------

             Summary: Automatically kill runaway processes 
                 Key: HIVE-16361
                 URL: https://issues.apache.org/jira/browse/HIVE-16361
             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.





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