[kudu-CR] disk failure: tests for disk failure recovery

["Andrew Wong (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins,

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

    http://gerrit.cloudera.org:8080/7243

to look at the new patch set (#5).

Change subject: disk failure: tests for disk failure recovery
......................................................................

disk failure: tests for disk failure recovery

This patch adds an EMC test that spawns three servers and triggers EIOs
on two of them to fail two different tablets. With improper
disk-failure-handling, this scenario alone would have been enough to
leave the server with only a single copy of data, as the two servers
with EIOs would have been shut down entirely.

With proper disk-failure handling, this scenario would be salvageable,
and data would be replicated on the remaining disks. This exercises the
FlushMRS codepath.

Tests are also added to test behavior during FlushDMS calls and scans,
ensuring the servers return to a normal state.

Change-Id: I364c0ae2ac48920bcbd5b662b931ca448464c90e
---
M src/kudu/integration-tests/CMakeLists.txt
A src/kudu/integration-tests/disk_failure-itest.cc
2 files changed, 361 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/43/7243/5
-- 
To view, visit http://gerrit.cloudera.org:8080/7243
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I364c0ae2ac48920bcbd5b662b931ca448464c90e
Gerrit-PatchSet: 5
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>