java.net.SocketException：連接重置OKHTTP

我使用okhttp將文件上傳到我的服務器，並將文件加載到Google文檔查看器中供我的用戶預覽。但是，由於我無法在服務器上找到文件，因此上傳失敗。引發的異常提供以下堆棧跟蹤：java.net.SocketException：連接重置OKHTTP

Cannot setInForeground() - never saw a connection for the pid: 22551 
08-08 04:23:37.208 22551-22605/ W/System.err: java.net.SocketException: Connection reset 
08-08 04:23:37.330 22551-22551/ W/cr_BindingManager: Cannot call determinedVisibility() - never saw a connection for the pid: 22551 
08-08 04:23:37.331 22551-22551/ W/cr_BindingManager: Cannot call determinedVisibility() - never saw a connection for the pid: 22551 
08-08 04:23:39.213 22551-22551/ W/cr_BindingManager: Cannot call determinedVisibility() - never saw a connection for the pid: 22551 
08-08 04:23:40.672 22551-22551/ W/cr_BindingManager: Cannot call determinedVisibility() - never saw a connection for the pid: 22551 
08-08 04:23:41.203 22551-22551/ W/cr_BindingManager: Cannot call determinedVisibility() - never saw a connection for the pid: 22551 
08-08 04:23:52.103 2751-3347/? D/WifiQualifiedNetworkSelector:: Current connection state (true,false,false) 
08-08 04:24:04.811 4124-4124/? W/GmsClientEvents: unregisterConnectionCallbacks(): listener [email protected] not found

PORT 80也是開放的。但是，有時上傳失敗一致。大多數時候它工作正常。這是服務器端還是客戶端問題？如果客戶端是它的原因，它是如何工作的某些時候。超時錯誤是問題的原因嗎？我檢查了大或小的文件，但我不知道是什麼導致了這個問題。

這是我上傳的文件代碼：在計算器其他問題討論

try { 
     File f = new File(selectedFilePath); 

     String file_path = f.getAbsolutePath(); 
     OkHttpClient client = new OkHttpClient(); 

     RequestBody file_body = RequestBody.create(MediaType.parse(content_type),f); 
     Log.e("msh", content_type); 
     RequestBody request_body = new MultipartBody.Builder() 
       .setType(MultipartBody.FORM) 
       .addFormDataPart("type",content_type) 
       .addFormDataPart("uploaded_file",file_path.substring(file_path.lastIndexOf("/")+1), file_body) 
       .build(); 

     Request request = new Request.Builder() 
       .url("http://fakeurl.com/retrofit_example/save_file.php?neran="+neran) 
       .post(request_body) 
       .build(); 



      response = client.newCall(request).execute(); //exception is here 



     } catch (UnknownHostException e) { 
      e.printStackTrace(); 
      /*uploadFile(selectedFilePath);*/ 
      upsuccess = false; 
     } catch (IOException e) { 
      e.printStackTrace(); 
      upsuccess = false; 
     } catch (NullPointerException e) { 
      e.printStackTrace(); 
      /*uploadFile(selectedFilePath);*/ 
      upsuccess = false; 
     } 

     if(response!=null) { 
      if (response.isSuccessful()) { 
       upsuccess = true; 
      } 
      response.body().close(); 
     }

我已經試過一切，但錯誤依然存在。雖然上傳失敗okhttp但其他方法和庫也有上述問題。

其他答案還建議：