[kudu-CR] KUDU-2126: Add conditional check to prevent unnecessary fsyncs

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

Hello Mike Percy, Kudu Jenkins, Todd Lipcon, 

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

    http://gerrit.cloudera.org:8080/9069

to look at the new patch set (#2).

Change subject: KUDU-2126: Add conditional check to prevent unnecessary fsyncs
......................................................................

KUDU-2126: Add conditional check to prevent unnecessary fsyncs

This patch includes unit test to detect fsyncs that happened
when a DeleteTablet RPC tries to tombstone an already tombstoned tablet.
In order to fix the issue, this patch add additional checking
before executing another DeleteTabletData that leads to another fsyncs.

Change-Id: Idde8b413374f43ca2ef09339f0f412208f03685e
---
M src/kudu/integration-tests/delete_tablet-itest.cc
M src/kudu/tablet/tablet_metadata.cc
M src/kudu/tablet/tablet_metadata.h
M src/kudu/tserver/ts_tablet_manager.cc
4 files changed, 70 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/69/9069/2
-- 
To view, visit http://gerrit.cloudera.org:8080/9069
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Idde8b413374f43ca2ef09339f0f412208f03685e
Gerrit-Change-Number: 9069
Gerrit-PatchSet: 2
Gerrit-Owner: Jeffrey F. Lukman <je...@gmail.com>
Gerrit-Reviewer: Jeffrey F. Lukman <je...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Mike Percy <mp...@apache.org>
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>