core/src/main/java/org/apache/servicecomb/core/governance/ServiceCombCircuitBreakerExtension.java [28:48]:
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  @Override
  protected String extractStatusCode(Object result) {
    if (!(result instanceof Response)) {
      return null;
    }
    Response resp = (Response) result;
    if (resp.isFailed()) {
      if (resp.getResult() instanceof InvocationException) {
        InvocationException e = resp.getResult();
        return String.valueOf(e.getStatusCode());
      }
    }
    return String.valueOf(resp.getStatusCode());
  }

  @Override
  public boolean isFailedResult(Throwable e) {
    if (e instanceof InvocationException) {
      InvocationException invocationException = (InvocationException) e;
      if (invocationException.getStatusCode() == Status.SERVICE_UNAVAILABLE.getStatusCode() ||
          invocationException.getStatusCode() == Status.BAD_GATEWAY.getStatusCode() ||
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core/src/main/java/org/apache/servicecomb/core/governance/ServiceCombRetryExtension.java [28:48]:
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  @Override
  protected String extractStatusCode(Object result) {
    if (!(result instanceof Response)) {
      return null;
    }
    Response resp = (Response) result;
    if (resp.isFailed()) {
      if (resp.getResult() instanceof InvocationException) {
        InvocationException e = resp.getResult();
        return String.valueOf(e.getStatusCode());
      }
    }
    return String.valueOf(resp.getStatusCode());
  }

  @Override
  public boolean isFailedResult(Throwable e) {
    if (e instanceof InvocationException) {
      InvocationException invocationException = (InvocationException) e;
      if (invocationException.getStatusCode() == Status.SERVICE_UNAVAILABLE.getStatusCode() ||
          invocationException.getStatusCode() == Status.BAD_GATEWAY.getStatusCode() ||
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