Csaba Ringhofer has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/15793


Change subject: IMPALA-9609: Minimize Frontend activity in executor only 
impalads
......................................................................

IMPALA-9609: Minimize Frontend activity in executor only impalads

Until now the Frontend started fully regardless of flag is_coordinator,
e.g. created connections to the HMS, which is both error prone and can
DoS the metastore.

Executor only impalads still need a JVM as queries can contain
java calls (HDFS/Hbase API calls, Hive UDFs).

Change-Id: I4627e5e3520175153cb49e24fd480815dfefdae1
---
M fe/src/main/java/org/apache/impala/service/Frontend.java
M fe/src/main/java/org/apache/impala/service/JniFrontend.java
M tests/custom_cluster/test_coordinators.py
3 files changed, 29 insertions(+), 12 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/93/15793/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I4627e5e3520175153cb49e24fd480815dfefdae1
Gerrit-Change-Number: 15793
Gerrit-PatchSet: 1
Gerrit-Owner: Csaba Ringhofer <[email protected]>

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