java.io.IOException：okhttp3.Address@46888237上意外的流结束

Question

这是代码：

//OkHttpClient client = new OkHttpClient();
OkHttpClient client = new OkHttpClient.Builder()
    .retryOnConnectionFailure(true)
    .build();
MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
RequestBody body = RequestBody.create(mediaType, "username=tokenaccess&password=test123");

产生错误：

  

java.io.IOException：okhttp3.Address@46888237上意外的流结束