[kudu-CR] KUDU-1409. Make krpc call timeouts more resistant to process or reactor pauses

["Todd Lipcon (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins,

I'd like you to reexamine a change.  Please visit

    http://gerrit.cloudera.org:8080/2745

to look at the new patch set (#3).

Change subject: KUDU-1409. Make krpc call timeouts more resistant to process or reactor pauses
......................................................................

KUDU-1409. Make krpc call timeouts more resistant to process or reactor pauses

In stress testing Impala on Kudu I've seen various RPC timeouts that turn out
to be due to pauses on the client side. In particular, scenarios like
IMPALA-2800[1] can cause the memory allocator inside Impala to block for
several seconds, and that might cause us to think we missed a timeout.

This adds a little workaround in our libev timeout handling code. The
full description of the workaround can be found in connection.cc.

[1] https://issues.cloudera.org/browse/IMPALA-2800

Change-Id: I7bff0bc1573a059f12be8bd3f46e301275e78392
---
M src/kudu/rpc/connection.cc
M src/kudu/rpc/connection.h
M src/kudu/rpc/messenger.h
M src/kudu/rpc/rpc-test-base.h
M src/kudu/rpc/rpc-test.cc
M src/kudu/rpc/rpc_stub-test.cc
6 files changed, 103 insertions(+), 6 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/45/2745/3
-- 
To view, visit http://gerrit.cloudera.org:8080/2745
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I7bff0bc1573a059f12be8bd3f46e301275e78392
Gerrit-PatchSet: 3
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Todd Lipcon <to...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Mike Percy <mp...@apache.org>