[kudu-CR] RKUDU-3535 Clear log cache while tombstoning a replica.

["Song Jiacheng (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins, Wang Xixu, 

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

    http://gerrit.cloudera.org:8080/20822

to look at the new patch set (#7).

Change subject: RKUDU-3535 Clear log cache while tombstoning a replica.
......................................................................

RKUDU-3535 Clear log cache while tombstoning a replica.

The log cache of a replica still exists even if the replica has been
already tombstoned. This problem might take place if we decrease
the replication factor of a table with high throughput.

So we should clear the log cache while deleting the replica with
delete type TABLET_DATA_TOMBSTONED.

Change-Id: I6cf545e604f80d41e7ebd9660acfd2e928cd27a9
---
M src/kudu/consensus/consensus_queue-test.cc
M src/kudu/consensus/consensus_queue.cc
M src/kudu/consensus/consensus_queue.h
M src/kudu/consensus/log_cache.cc
M src/kudu/consensus/log_cache.h
5 files changed, 30 insertions(+), 6 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/22/20822/7
-- 
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I6cf545e604f80d41e7ebd9660acfd2e928cd27a9
Gerrit-Change-Number: 20822
Gerrit-PatchSet: 7
Gerrit-Owner: Song Jiacheng <so...@thinkingdata.cn>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Song Jiacheng <so...@thinkingdata.cn>
Gerrit-Reviewer: Wang Xixu <14...@qq.com>