Song Jiacheng has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/20600


Change subject: KUDU-3486 Master periodically request for full reports. A 
tombstoned tablet replica might never be deleted since the delete-type deletion 
could only occur when the tablet is deleted, and the requests will be sent to 
the voters, not including the tombstone
......................................................................

KUDU-3486 Master periodically request for full reports.
A tombstoned tablet replica might never be deleted since the
delete-type deletion could only occur when the tablet is deleted,
and the requests will be sent to the voters, not including the
tombstoned ones.
The data of tombstone replica is deleted, but metadata is persisted
in memory, which will occupy a lot of memory, especially for the
tablets with big SchemaPB.
Tombstoned replicas can be deleted while sending heartbeats with
a full tablet report. So making the tservers periodically send
full report will detele the useless tombstoned replicas. See
KUDU-3486 for details.

Change-Id: I92d3b3e44f49ad24a95fa10f351c6bd55c6eca7b
---
M src/kudu/master/master_service.cc
M src/kudu/master/ts_descriptor.cc
M src/kudu/master/ts_descriptor.h
3 files changed, 47 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/00/20600/1
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I92d3b3e44f49ad24a95fa10f351c6bd55c6eca7b
Gerrit-Change-Number: 20600
Gerrit-PatchSet: 1
Gerrit-Owner: Song Jiacheng <[email protected]>

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