Thomas Tauber-Marshall has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/4519

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

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

During times of high load, Thrift's TThreadedServer can't keep up with the
rate of new socket connections, causing some to time out.

This patch creates TAcceptQueueThreadedServer, which is a modified version of
TThreadedServer that calls accept() and then hands the returned TTransport
off to a thread pool to handle setting up the connection. This ensures that
accept() is called as quickly as possible, preventing connections from timing
out while waiting.

This patch has been tested locally with the repro shown in IMPALA-4135, but
it still needs to be tested in a real cluster.

Change-Id: Ie50e728974ef31a9d49132a0b3f7cde2a4f3356d
---
M be/CMakeLists.txt
M be/src/rpc/thrift-server.cc
A be/src/server/CMakeLists.txt
A be/src/server/TAcceptQueueThreadedServer.cpp
A be/src/server/TAcceptQueueThreadedServer.h
5 files changed, 449 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/19/4519/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Ie50e728974ef31a9d49132a0b3f7cde2a4f3356d
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Thomas Tauber-Marshall <tmarsh...@cloudera.com>

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