@AfterClass
  public static void finalizeTests() throws Exception {
    int serverExceptionCount = sslEchoServer.getExceptionCount();
    assertEquals(serverExceptionCount, 0);
    sslEchoServer.close();
  }
Run only once for all tests
ambry-network/src/test/java/com/github/ambry/network/SSLBlockingChannelTest.java