[jira] [Created] (REEF-850) Delete or suppress verbose outputs in Unit Test

["Dongjoon Hyun (JIRA)" <ji...@apache.org>]

Dongjoon Hyun created REEF-850:
----------------------------------

             Summary: Delete or suppress verbose outputs in Unit Test
                 Key: REEF-850
                 URL: https://issues.apache.org/jira/browse/REEF-850
             Project: REEF
          Issue Type: Task
    Affects Versions: 0.13
            Reporter: Dongjoon Hyun
            Assignee: Dongjoon Hyun
            Priority: Trivial


`TestCombiner` generates about 1100 lines. It's a little bit debugging message since nobody examines those lines. (over 15%)

{code}
public void onNext(final Entry<Integer, Integer> value) {
-  System.out.println(value.getKey() + "=" + value.getValue());
  x.incrementAndGet();
{code}

`HostnameBasedLocalAddressProvider` generates meaningful messages but its level is too high. We can save 770 lines. (over 10%)
{code}
  private HostnameBasedLocalAddressProvider() {
-    LOG.log(Level.INFO, "Instantiating HostnameBasedLocalAddressProvider");
+    LOG.log(Level.FINE, "Instantiating HostnameBasedLocalAddressProvider");
  }
{code}

This PR will make it easy to review the test result.



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