[jira] [Created] (GIRAPH-537) Log message for aggregators has cryptic wording

["Alessandro Presta (JIRA)" <ji...@apache.org>]

Alessandro Presta created GIRAPH-537:
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             Summary: Log message for aggregators has cryptic wording
                 Key: GIRAPH-537
                 URL: https://issues.apache.org/jira/browse/GIRAPH-537
             Project: Giraph
          Issue Type: Bug
            Reporter: Alessandro Presta
            Assignee: Maja Kabiljo


When workers are synchronizing aggregators using the ExpectedBarrier class, the following message is printed:

"waitForRequiredPermits: Waiting for times required to be X (currently Y)"

I find this doesn't convey much about what exactly we're waiting for.

We should make the log more meaningful and explicitly mention aggregators, at the cost of simplifying things a bit.
Additionally, we could skip it altogether when no aggregators are being used.

The ExpectedBarrier class itself also lacks clear documentation: what is this class for? The Javadoc explains how it works without first stating what it is.

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