Csaba Ringhofer has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/15956 )

Change subject: IMPALA-9764: TransactionKeepalive should set sleep interval 
based on Hive Configuration
......................................................................


Patch Set 1: Code-Review+2

(1 comment)

http://gerrit.cloudera.org:8080/#/c/15956/1/fe/src/main/java/org/apache/impala/common/TransactionKeepalive.java
File fe/src/main/java/org/apache/impala/common/TransactionKeepalive.java:

http://gerrit.cloudera.org:8080/#/c/15956/1/fe/src/main/java/org/apache/impala/common/TransactionKeepalive.java@211
PS1, Line 211:     HiveConf hiveConf = new HiveConf(TransactionKeepalive.class);
Can we always assume that there will be a hive-site.xml on the machine? What 
will happen if there isn't any, will we use the default values?

An alternative could be to ask HMS about the configs:
https://github.com/apache/hive/blob/037eacea46371015a7f9894c5a9ccfb9708d5c56/standalone-metastore/metastore-common/src/main/thrift/hive_metastore.thrift#L2298

I see that we already create a new HiveConfg in other parts of Impala, so I am 
ok with keeping this pattern in the is patch, just wanted to share my doubts 
about our approach.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I546dac324494f1c945e8943e267f8146d22a837d
Gerrit-Change-Number: 15956
Gerrit-PatchSet: 1
Gerrit-Owner: Zoltan Borok-Nagy <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Comment-Date: Tue, 19 May 2020 13:40:42 +0000
Gerrit-HasComments: Yes

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