java .io.InterruptedIOException: поток прерван

Question

У меня случайная и странная проблема с Android HttpsURLConnection. When HttpsURLConnection.getResponseCode (); называется, java .io.InterruptedIOException выбрасывается. Все сетевые операции выполняются внутри AsyncTask. Это происходит на производстве, и в настоящее время оно затрагивает более 2 тысяч пользователей в день на множестве различных устройств и версий ОС. Нет проблем с подключением inte rnet, также не срабатывает тайм-аут. Есть идеи о том, что искать? Вот мой код.

        URL url;
        String response = "";
        int resCode=200;
        try {
            url = new URL(requestURL);
            HostnameVerifier hostnameVerifier = new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return Servers.Companion.verifyHostName(hostname);
                }
            };
            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
            conn.setHostnameVerifier(hostnameVerifier);
            conn.setSSLSocketFactory(HttpsURLConnection.getDefaultSSLSocketFactory());
            conn.setReadTimeout(120000);
            conn.setConnectTimeout(30000);
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setRequestProperty("Content-Type", "application/json");
            byte[] outputBytes = json.getBytes("UTF-8");
            conn.connect();
            OutputStream os = conn.getOutputStream();
            os.write(outputBytes);
            resCode = conn.getResponseCode();//this triggers the exception
            long size = conn.getContentLength();
                int total = 0;
                int count = 0;
                InputStream in = conn.getInputStream();
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                DataOutputStream w = new DataOutputStream(baos);

                byte data[] = new byte[4096];

                while ((count = in.read(data)) != -1) {
                    if (isCancelled()) {
                        in.close();
                        return new ResponseOb(-100,"Downloading Canceled");
                    }

                    if(count>0) {
                        w.write(data, 0, count);
                        w.flush();
                    }
                    total += count;
                    if (size > 0) {
                        publishProgress((int) (total * 100 / size));
                    }
                }
.....

и вот исключение:

java.io.InterruptedIOException: thread interrupted
       at com.android.okhttp.okio.Timeout.throwIfReached(Timeout.java:145)
       at com.android.okhttp.okio.Okio$1.write(Okio.java:73)
       at com.android.okhttp.okio.AsyncTimeout$1.write(AsyncTimeout.java:155)
       at com.android.okhttp.okio.RealBufferedSink.flush(RealBufferedSink.java:221)
       at com.android.okhttp.internal.http.HttpConnection.flush(HttpConnection.java:141)
       at com.android.okhttp.internal.http.HttpTransport.finishRequest(HttpTransport.java:52)
       at com.android.okhttp.internal.http.HttpEngine.readNetworkResponse(HttpEngine.java:902)
       at com.android.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:788)
       at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:439)
       at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:384)
       at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:497)
       at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getResponseCode(DelegatingHttpsURLConnection.java:105)
       at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:25)
       at helectronsoft.com.live.wallpaper.pixel4d.network.ListDownloader.performPostCall(ListDownloader.java:317)
       at helectronsoft.com.live.wallpaper.pixel4d.network.ListDownloader.doInBackground(ListDownloader.java:164)
       at helectronsoft.com.live.wallpaper.pixel4d.network.ListDownloader.doInBackground(ListDownloader.java:46)
       at android.os.AsyncTask$2.call(AsyncTask.java:307)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:246)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
       at java.lang.Thread.run(Thread.java:833)