Bharath Krishna has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/12938


Change subject: IMPALA-8338 : Check CREATION_TIME of databases in event 
processor to avoid incorrect/redundant invalidates
......................................................................

IMPALA-8338 : Check CREATION_TIME of databases in event
processor to avoid incorrect/redundant invalidates

Process the drop database event only if the CREATION_TIME of the
catalog's database object is lesser than or equal to that of the
database object present in the notification event. If the
CREATION_TIME in the notification event object is lesser than
the catalog's DB object, it means that the Database object
present in the catalog is the latest and we do not need
to invalidate it in this case.

Testing :
 - Added unit tests in MetastoreEventsProcessorTest.
 - Enabled testCreateDropCreateDatabaseFromImpala as
   we now have CREATION_TIME in the notification events.

Change-Id: I8fd3685cf7261e4953f4f884850489a47c5bbd6c
---
M be/src/util/event-metrics.cc
M be/src/util/event-metrics.h
M common/thrift/JniCatalog.thrift
M common/thrift/metrics.json
M fe/src/main/java/org/apache/impala/catalog/CatalogServiceCatalog.java
M fe/src/main/java/org/apache/impala/catalog/events/MetastoreEvents.java
M 
fe/src/main/java/org/apache/impala/catalog/events/MetastoreEventsProcessor.java
M 
fe/src/test/java/org/apache/impala/catalog/events/MetastoreEventsProcessorTest.java
8 files changed, 136 insertions(+), 26 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/38/12938/4
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I8fd3685cf7261e4953f4f884850489a47c5bbd6c
Gerrit-Change-Number: 12938
Gerrit-PatchSet: 4
Gerrit-Owner: Bharath Krishna <[email protected]>

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