@Test void parsesListOfLocalhosts() {
    String hostList = "localhost:9201,localhost:9202";
    assertThat(new InitialEndpointSupplier(HTTP, hostList).get().endpoints())
      .containsExactly(Endpoint.of("localhost", 9201), Endpoint.of("localhost", 9202))
      .containsExactlyElementsOf(new InitialEndpointSupplier(HTTPS, hostList).get().endpoints());
  }
This helps ensure old setups don't break (provided they have http port 9200 open)
zipkin-server/src/test/java/zipkin2/server/internal/elasticsearch/InitialEndpointSupplierTest.java