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From Barna Zsombor Klara <>
Subject Re: Review Request 52084: HIVE-14775: Investigate IOException usage in Metrics APIs
Date Wed, 21 Sep 2016 15:20:32 GMT

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(Updated Sept. 21, 2016, 3:20 p.m.)

Review request for hive, Gabor Szadovszky, Peter Vary, Sergio Pena, and Szehon Ho.

Repository: hive-git

Description (updated)

I have refactored the exception handling in the metrics API. The initial objective was to
remove the throws clause from the methods which did not throw IOExceptions but were declaring
it. Finally I continued to remove the throws clause from the rest of the APIs since we were
never able to do anything else with the excpetions except log them out. New log messages were
introduced inside the metrics classes to capture exceptional conditions so we can omit the
try catch blocks when creating/updating metrics.


  common/src/java/org/apache/hadoop/hive/common/metrics/ 9be9b50aa02ff88816eb92079eaff9afa3e1be90

  common/src/java/org/apache/hadoop/hive/common/metrics/ 19946d9e93d55bbffb6d03cbc35e569849a86dd8

  common/src/java/org/apache/hadoop/hive/common/metrics/ a973155f079c6124a6981b04123d9496dc5d3448

  common/src/java/org/apache/hadoop/hive/common/metrics/common/ 4297233ed12a7d9a2fa03ac3204e8335c0aed821

  common/src/java/org/apache/hadoop/hive/common/metrics/metrics2/ 4c433678bd62ea74b80babce9856681192deb25f

  common/src/java/org/apache/hadoop/hive/ql/log/ 6a5d22f2bcc0a7efd869f7c0c0c8fad33ca35f74

  common/src/test/org/apache/hadoop/hive/common/metrics/ a3fb04f1ab9be8be9f69c616eabeb534b2a2d560

  metastore/src/java/org/apache/hadoop/hive/metastore/ 6830cf75dc163230cdabb4ed41d65c222c6ca54d

  metastore/src/java/org/apache/hadoop/hive/metastore/ f0b84768e891e4281a613e68590524646a038435

  ql/src/java/org/apache/hadoop/hive/ql/ 42d398dcc9a37bdb2d90c940c579c55fb76b4cca

  service/src/java/org/apache/hive/service/cli/operation/ 90fe76d00e6f833e18d183c290f13c23db9303a1



Tested basic metric gathering with both codahale and legacy metrics class.
Updated and ran unit tests in the common project.


Barna Zsombor Klara

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