@Test void spansRoundTrip_JSON_V1() {
    List<Span> tenClientSpans = Collections.nCopies(10, span);

    byte[] message = SpanBytesEncoder.JSON_V1.encodeList(tenClientSpans);

    assertThat(SpanBytesDecoder.JSON_V1.decodeList(message)).isEqualTo(tenClientSpans);
  }
Particular, thrift can mistake malformed content as a huge list. Let's not blow up.
zipkin/src/test/java/zipkin2/codec/V1SpanBytesDecoderTest.java