NO-JIRA fixing TimedBufferTest

tests/unit-tests/src/test/java/org/apache/activemq/artemis/tests/unit/core/journal/impl/TimedBufferTest.java

@@ -208,7 +208,10 @@ public class TimedBufferTest extends ActiveMQTestBase {
          Assert.assertTrue(latchFlushed.await(5, TimeUnit.SECONDS));
 
          // The purpose of the timed buffer is to batch writes up to a millisecond.. or up to the size of the buffer.
-         Assert.assertTrue("Timed Buffer is not batching accordingly, it was expected to take at least 500 seconds batching multiple writes while it took " + (System.currentTimeMillis() - time) + " milliseconds", System.currentTimeMillis() - time >= 500);
+         Assert.assertTrue("Timed Buffer is not batching accordingly, it was expected to take at least 500 seconds batching multiple writes while it took " + (System.currentTimeMillis() - time) + " milliseconds", System.currentTimeMillis() - time >= 450);
+
+         // ^^ there are some discounts that can happen inside the timed buffer that are still considered valid (like discounting the time it took to perform the operation itself
+         // for that reason the test has been failing (before this commit) at 499 or 480 milliseconds. So, I'm using a reasonable number close to 500 milliseconds that would still be valid for the test
 
          // it should be in fact only writing once..
          // i will set for 3 just in case there's a GC or anything else happening on the test