Impala Public Jenkins has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/14008 )

Change subject: IMPALA-8832: Fix HTTP client protocol to work with Apache Knox
......................................................................

IMPALA-8832: Fix HTTP client protocol to work with Apache Knox

This patch fixes two bugs with Impala's HTTP client protocol:
- THttpServer transports are no longer wrapped in TBufferedTransports.
  THttpServer already has its own support for buffering to process one
  HTTP request at a time, and wrapping it in a TBufferedTransport
  interferes with this, in some cases causing client requests to
  either not be processed or to recieve multiple responses.
- Fixes a bug in THttpTransport where when a chunked HTTP request is
  finished being processed, the 'readHeaders_' variable is never reset
  and further requests over the connection are not processed.

Testing:
- Tested by proxying beeline connections to Impala through Apache Knox

Change-Id: I5c9d934a654a9e6aaf9207fa5856f956baaacf55
Reviewed-on: http://gerrit.cloudera.org:8080/14008
Reviewed-by: Thomas Tauber-Marshall <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
---
M be/src/rpc/auth-provider.h
M be/src/rpc/authentication.cc
M be/src/rpc/thrift-server.cc
M be/src/transport/THttpTransport.cpp
4 files changed, 47 insertions(+), 58 deletions(-)

Approvals:
  Thomas Tauber-Marshall: Looks good to me, approved
  Impala Public Jenkins: Verified

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I5c9d934a654a9e6aaf9207fa5856f956baaacf55
Gerrit-Change-Number: 14008
Gerrit-PatchSet: 4
Gerrit-Owner: Thomas Tauber-Marshall <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Thomas Tauber-Marshall <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>

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