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From "Venkata krishnan Sowrirajan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-1399) Drill-bit process threads keeps on increasing
Date Wed, 10 Sep 2014 19:11:33 GMT
Venkata krishnan Sowrirajan created DRILL-1399:
--------------------------------------------------

             Summary: Drill-bit process threads keeps on increasing
                 Key: DRILL-1399
                 URL: https://issues.apache.org/jira/browse/DRILL-1399
             Project: Apache Drill
          Issue Type: Bug
            Reporter: Venkata krishnan Sowrirajan


I actually found increasing number of threads in drill-bit process whenever an exception occurs
and the threads are in BLOCKED state. 

So this is what I am trying to do.

"select columns[0], columns[1] from `/data.csv` where columns[0] > 500000 limit 100;" This
query fails with a NumberFormatException because the column header is having a string which
is understandable. So if I do the same query again and again, some of the drill-bit threads
goes into waiting state forever. And for the new query another set of threads are spawned
which increases the number of threads with in the drillbit process over a period of time.
Have anyone seen similar scenario? Wouldn't this overload the process over a period of time?

Please let me know if you need any other details. I have the JStack output taken from drillbit
process after running the query every time.



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