@Test
public void testStartRpc() throws Exception {

    this.rpcSofaTracer.startRpc(sofaRequest);
    SofaTraceContext sofaTraceContext = SofaTraceContextHolder.getSofaTraceContext();
    SofaTracerSpan sofaTracerSpan = sofaTraceContext.pop();
    assertNotNull(sofaTracerSpan);
    System.err.println("\n" + sofaTracerSpan);
}