adelapena commented on a change in pull request #870:
URL: https://github.com/apache/cassandra/pull/870#discussion_r572884430



##########
File path: 
test/unit/org/apache/cassandra/cql3/validation/operations/AlterTest.java
##########
@@ -269,6 +276,63 @@ public void testCreateAlterKeyspaces() throws Throwable
                                   "max_threshold", "32")));
     }
 
+    @Test
+    public void testCreateAlterKeyspacesRFWarnings() throws Throwable
+    {
+        requireNetwork();
+        Thread.sleep(1000); // Hack: requireNetwork() will clear warnings 
async so give some time to complete

Review comment:
       Polling seems like a good way to avoid the test becoming flaky. However, 
I'm still unable to reproduce the failure when the current wait is absent. I 
have removed the wait 
[here](https://github.com/adelapena/cassandra/commits/CASSANDRA-16296-review-3) 
and run both the individual test and the entire suite/class in the multiplexer:
   * 
[method](https://jenkins-dse.build.dsinternal.org/view/Parameterized/job/parameterized-testall/690/)
   * 
[class](https://jenkins-dse.build.dsinternal.org/view/Parameterized/job/parameterized-testall/691/)
   
   It's 100 runs for the class and 200 runs for the method, without any 
failure. Running them locally a few dozen times doesn't produce any failure 
either.




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