Thomas Tauber-Marshall has posted comments on this change.

Change subject: IMPALA-4135: Thrift threaded server times-out connections 
during high load
......................................................................


Patch Set 5:

The patch passed an exhaustive run on Jenkins:
http://sandbox.jenkins.cloudera.com/job/impala-umbrella-build-and-test/4911/

I have also now, with Mostafa's help, come up with a query that reliably 
reproduces the issue on the 16 node cluster and succeeds on the 16 node with 
this patch deployed:

 select /* +straight_join */ count(*) from
 tpch_300_parquet.orders A join /* +shuffle */  tpch_300_parquet.orders B on 
A.o_orderkey = B.o_orderkey 
 join /* +shuffle */   tpch_300_parquet.orders C on c.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders D on d.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders E on e.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders F on f.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders G on g.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders H on h.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders I on i.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders J on j.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders K on k.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders L on l.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders M on m.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders N on n.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders O on o.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders P on p.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders Q on q.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders R on r.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders S on s.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders T on t.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders U on u.o_orderkey = B.o_orderkey
 join /* +shuffle */   tpch_300_parquet.orders V on v.o_orderkey = B.o_orderkey
 where a.o_orderkey < 100000;

Currently working on testing it with Kerberos on.

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Gerrit-MessageType: comment
Gerrit-Change-Id: Ie50e728974ef31a9d49132a0b3f7cde2a4f3356d
Gerrit-PatchSet: 5
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Thomas Tauber-Marshall <[email protected]>
Gerrit-Reviewer: Henry Robinson <[email protected]>
Gerrit-Reviewer: Juan Yu <[email protected]>
Gerrit-Reviewer: Matthew Jacobs <[email protected]>
Gerrit-Reviewer: Sailesh Mukil <[email protected]>
Gerrit-Reviewer: Thomas Tauber-Marshall <[email protected]>
Gerrit-HasComments: No

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