@Test
public void testToString() throws Exception {

    SofaRpcException exception = new SofaRpcException(RpcErrorType.SERVER_BUSY, "111");
    String string = ExceptionUtils.toString(exception);
    Assert.assertNotNull(string);
    Pattern pattern = Pattern.compile("at");
    Matcher matcher = pattern.matcher(string);
    int count = 0;
    while (matcher.find()) {
        count++;
    }
    Assert.assertTrue(count > 1);
}