[kudu-CR] KUDU-3273: check result of TableLocationsCache.get() for null

["Li Zhiming (Code Review)" <ge...@cloudera.org>]

Hello Alexey Serbin, Kudu Jenkins, Andrew Wong, 

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

    http://gerrit.cloudera.org:8080/17288

to look at the new patch set (#6).

Change subject: KUDU-3273: check result of TableLocationsCache.get() for null
......................................................................

KUDU-3273: check result of TableLocationsCache.get() for null

For TableLocationsCache, if get(key) is called immediately after
cacheTabletLocations(key), it should not return null.
But if partitions change and a call to cacheTabletLocations(otherKey)
occurs between calls to cacheTableLocations(key) and get(key),
the latter might return null.

Change-Id: I13475701804ea4ae2bf8089a1e2b9143a12d2ab9
---
M java/kudu-client/src/main/java/org/apache/kudu/client/AsyncKuduClient.java
M java/kudu-client/src/test/java/org/apache/kudu/client/TestRemoteTablet.java
M java/kudu-client/src/test/java/org/apache/kudu/client/TestTableLocationsCache.java
M java/kudu-test-utils/src/main/java/org/apache/kudu/test/ProtobufUtils.java
4 files changed, 60 insertions(+), 3 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/88/17288/6
-- 
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I13475701804ea4ae2bf8089a1e2b9143a12d2ab9
Gerrit-Change-Number: 17288
Gerrit-PatchSet: 6
Gerrit-Owner: Li Zhiming <li...@thinkingdata.cn>
Gerrit-Reviewer: Alexey Serbin <as...@cloudera.com>
Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins (120)