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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/52084/
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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)
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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.


Diffs
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  common/src/java/org/apache/hadoop/hive/common/metrics/LegacyMetrics.java 
9be9b50aa02ff88816eb92079eaff9afa3e1be90 
  common/src/java/org/apache/hadoop/hive/common/metrics/MetricsMBean.java 
19946d9e93d55bbffb6d03cbc35e569849a86dd8 
  common/src/java/org/apache/hadoop/hive/common/metrics/MetricsMBeanImpl.java 
a973155f079c6124a6981b04123d9496dc5d3448 
  common/src/java/org/apache/hadoop/hive/common/metrics/common/Metrics.java 
4297233ed12a7d9a2fa03ac3204e8335c0aed821 
  
common/src/java/org/apache/hadoop/hive/common/metrics/metrics2/CodahaleMetrics.java
 4c433678bd62ea74b80babce9856681192deb25f 
  common/src/java/org/apache/hadoop/hive/ql/log/PerfLogger.java 
6a5d22f2bcc0a7efd869f7c0c0c8fad33ca35f74 
  common/src/test/org/apache/hadoop/hive/common/metrics/TestLegacyMetrics.java 
a3fb04f1ab9be8be9f69c616eabeb534b2a2d560 
  metastore/src/java/org/apache/hadoop/hive/metastore/HMSMetricsListener.java 
6830cf75dc163230cdabb4ed41d65c222c6ca54d 
  metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java 
f0b84768e891e4281a613e68590524646a038435 
  ql/src/java/org/apache/hadoop/hive/ql/Driver.java 
42d398dcc9a37bdb2d90c940c579c55fb76b4cca 
  service/src/java/org/apache/hive/service/cli/operation/Operation.java 
90fe76d00e6f833e18d183c290f13c23db9303a1 

Diff: https://reviews.apache.org/r/52084/diff/


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


Thanks,

Barna Zsombor Klara

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