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From "Abdelrahman Fouda (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GIRAPH-1220) Overwrite aggregators are no stable.
Date Tue, 14 May 2019 13:46:00 GMT
Abdelrahman Fouda created GIRAPH-1220:
-----------------------------------------

             Summary: Overwrite aggregators are no stable.
                 Key: GIRAPH-1220
                 URL: https://issues.apache.org/jira/browse/GIRAPH-1220
             Project: Giraph
          Issue Type: Bug
            Reporter: Abdelrahman Fouda


Although my code only updates the overwritable aggregator only by the master, tracking the
aggregator implementation lead me to the following scenario:

1- master writes to aggregator

2-  aggregator value is aggregated with the values received from other workers/partitions 

Therefore, the value written by the master is overwritten by the reduced values received in
the method 

MasterAggregatorHandler.acceptReducedValues()

 



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