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From Marta Kuczora <>
Subject Review Request 53257: HIVE-14960: Improve the stability of TestNotificationListener
Date Fri, 28 Oct 2016 10:08:24 GMT

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Review request for hive, Aihua Xu, Chaoyu Tang, Peter Vary, and Barna Zsombor Klara.

Bugs: HIVE-14960

Repository: hive-git


The TestNotificationListener test fails occasionally. It happens if the testAMQListener method
is completed and the recevied messages are checked before the last "DROP_TABLE" message got
processed and put to the "actualMessages" list by the onMessage method. 
As a solution I used a CountDownLatch which count is decreased by 1 when a message is processed.
And the "testAMQListener" method will wait for the Latch to reach zero or a maximum time limit
before complete.





The change effects only a unit test.
Ran the test many times locally.
Added random sleeps to simulate the delay of the message processing.


Marta Kuczora

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