[kudu-CR] KUDU-2208 Add RETRY ON EINTR() to Subprocess

["Jeffrey F. Lukman (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins, Todd Lipcon, 

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

    http://gerrit.cloudera.org:8080/9015

to look at the new patch set (#9).

Change subject: KUDU-2208 Add RETRY_ON_EINTR() to Subprocess
......................................................................

KUDU-2208 Add RETRY_ON_EINTR() to Subprocess

This patch submits a unit test that create a Subprocess thread
and while it is starting and waiting, another thread sends kill signals
to the Subprocess thread. Since the pthread_kill() signal is sent
asynchronously, sometimes the pthread_kill() raises error signal 3.
In that condition, the unit test logs the incident as an INFO.

Prior to this bug fix patch, the Subprocess throws an exception
because it cannot handle the kill signal in Wait() state. To fix the bug,
we add RETRY_ON_EINTR() inside Subprocess::DoWait() function.

Furthermore, this patch also moves the RETRY_ON_EINTR() function
that occurs in many places across the code to os-util.h.

Change-Id: I148b4619a8dda8e3e95dd6ea5c6e993a9e37a333
---
M src/kudu/consensus/log_index.cc
M src/kudu/util/env_posix.cc
M src/kudu/util/net/socket.cc
M src/kudu/util/os-util.h
M src/kudu/util/subprocess-test.cc
M src/kudu/util/subprocess.cc
6 files changed, 73 insertions(+), 22 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/15/9015/9
-- 
To view, visit http://gerrit.cloudera.org:8080/9015
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I148b4619a8dda8e3e95dd6ea5c6e993a9e37a333
Gerrit-Change-Number: 9015
Gerrit-PatchSet: 9
Gerrit-Owner: Jeffrey F. Lukman <je...@gmail.com>
Gerrit-Reviewer: Jeffrey F. Lukman <je...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>