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From "Impala Public Jenkins (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-5388: Only retry RPC on lost connection in send call
Date Thu, 08 Jun 2017 10:09:19 GMT
Impala Public Jenkins has submitted this change and it was merged.

Change subject: IMPALA-5388: Only retry RPC on lost connection in send call
......................................................................


IMPALA-5388: Only retry RPC on lost connection in send call

Previously, DoRpc() blacklists only a couple of conditions
which shouldn't retry the RPC on exception. This is fragile
as the errors could have happened after the payload has been
successfully sent to the destination. Such aggressive retry
behavior can lead to duplicated row batches being sent, causing
wrong results in queries.

This change fixes the problem by whitelisting the conditions
in which the RPC can be retried. Specifically, it pattern-matches
against certain errors in TSocket::write_partial() in the thrift
library and only retries the RPC in those cases. With SSL enabled,
we will never retry. We should investigate whether there are some
cases in which it's safe to retry.

This change also adds fault injection in the TransmitData() RPC
caller's path to emulate different exception cases.

Change-Id: I176975f2aa521d5be8a40de51067b1497923d09b
Reviewed-on: http://gerrit.cloudera.org:8080/7063
Reviewed-by: Michael Ho <kwho@cloudera.com>
Tested-by: Impala Public Jenkins
---
M be/src/common/global-flags.cc
M be/src/rpc/thrift-util.cc
M be/src/rpc/thrift-util.h
M be/src/runtime/backend-client.h
M be/src/runtime/client-cache.h
M be/src/testutil/CMakeLists.txt
A be/src/testutil/fault-injection-util.cc
M be/src/testutil/fault-injection-util.h
A tests/custom_cluster/test_rpc_exception.py
9 files changed, 300 insertions(+), 54 deletions(-)

Approvals:
  Impala Public Jenkins: Verified
  Michael Ho: Looks good to me, approved



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Gerrit-MessageType: merged
Gerrit-Change-Id: I176975f2aa521d5be8a40de51067b1497923d09b
Gerrit-PatchSet: 12
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Michael Ho <kwho@cloudera.com>
Gerrit-Reviewer: Alan Choi <alan@cloudera.com>
Gerrit-Reviewer: Dan Hecht <dhecht@cloudera.com>
Gerrit-Reviewer: Henry Robinson <henry@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins
Gerrit-Reviewer: Juan Yu <jyu@cloudera.com>
Gerrit-Reviewer: Michael Ho <kwho@cloudera.com>
Gerrit-Reviewer: Sailesh Mukil <sailesh@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstrong@cloudera.com>

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