Timeout for server request made using “Volley” onl

问题:

In one of my application, I am sending request to server using volley provided by Google.

Problem : Timeout and error object is null on onErrorResponse(VolleyError error)

What i have tried so far :

1) First I got null error object so solved it by using below code :

 @Override
 protected void deliverResponse(String response) {
    super.deliverResponse(response);
 }

 @Override
 public void deliverError(VolleyError error) {
     super.deliverError(error);
     DebugLog.e("deliverResponse", "getNetworkTimeMs : " + error.getNetworkTimeMs());
 }

So far I have got that there is timeout happening when I got error object null.

2) Now Application is for Android and iOS and web but timeout happens only for Android.

Volley log for requests :

BasicNetwork.logSlowRequests: HTTP response for request

Edited Note :

1. Web services develoed at server end is same for all three instances (Android , Web and iOS).

2. Timeout happens when too many users makes requests to the server.

3. I have set time out to 2 minutes though volley throws timeout in 30 seconds only sometimes.

4. I have many answers to change server but as it is not possible so any other solution please.

I also like to add that if i can get more information about when timeout can be possible in volley ?

References I have been gone through :

Optimizing Volley

httpclient-often-times-out-using-wifi-is-going-fine-with-3g

long_xmlhttprequest_ajax_requests_timeout_on_android

Edited :

I have also set retry policy as below:

request.setRetryPolicy(new DefaultRetryPolicy(DefaultRetryPolicy.DEFAULT_TIMEOUT_MS * 48,
                0, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

And also i do not want to retry if connection timeout.

How can i make efficient service call that can solve problem for timeout.

Any help will be appriciated.

Thanks.

回答1:

As i have tried to get solution of this issue for about two months, I did not get any perfect solution. Though I analyze some facts as below :

1. You can upgrade your server's performance
2. I have tried making web-service request using HttpURLConnection but still getting same issue over there.

So I think this issue is not specific from volley, but you getting this issue then i would suggest to increase server performance with customizing below RetryPolicy:

int x=2;// retry count
request.setRetryPolicy(new DefaultRetryPolicy(DefaultRetryPolicy.DEFAULT_TIMEOUT_MS * 48,
                    x, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

Hope it will help.

Suggestions are always welcome :)

Please comment below if you found more proper solution.

Thanks.!

回答2:

IMHO, you can refer to the following:

Inside BasicNetwork.java, you will find some information such as:

...
private static int SLOW_REQUEST_THRESHOLD_MS = 3000;
...
    /**
     * Logs requests that took over SLOW_REQUEST_THRESHOLD_MS to complete.
     */
    private void logSlowRequests(long requestLifetime, Request<?> request,
            byte[] responseContents, StatusLine statusLine) {
        if (DEBUG || requestLifetime > SLOW_REQUEST_THRESHOLD_MS) {
            VolleyLog.d("HTTP response for request=<%s> [lifetime=%d], [size=%s], " +
                    "[rc=%d], [retryCount=%s]", request, requestLifetime,
                    responseContents != null ? responseContents.length : "null",
                    statusLine.getStatusCode(), request.getRetryPolicy().getCurrentRetryCount());
        }
    }
...

// if the request is slow, log it.
long requestLifetime = SystemClock.elapsedRealtime() - requestStart;
logSlowRequests(requestLifetime, request, responseContents, statusLine);
...

So, if your project uses Google's volley as a module (not JAR file), you can update BasicNetwork.java, increasing SLOW_REQUEST_THRESHOLD_MS value, perhaps 10000 (ms) or more, for example.

Another option, according to @neuron's answer at the following question:

How to optimize network-queue-take in android Volley? (Volley Google IO 2013)

I think you can try increase the value of NETWORK_THREAD_POOL_SIZE by using the following constructor in your app:

public RequestQueue(Cache cache, Network network, int threadPoolSize) {
        this(cache, network, threadPoolSize,
                new ExecutorDelivery(new Handler(Looper.getMainLooper()))); }

P/S: if you only want the lines BasicNetwork.logSlowRequests: HTTP response for request not displayed anymore without increasing NETWORK_THREAD_POOL_SIZE, only need to comment (//) the line logSlowRequests... above (when your app uses Google's volley as a module - not jar file, not compile mcxiaoke... in build.gradle file)

Hope it helps!

回答3:

public class JGet extends Request {
    private final Response.Listener listener;

    public JGet(final String url, List params,
                Response.Listener responseListener) {
        super(Request.Method.GET, NetUtils.getUrlWithParams(url, params), new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                NetUtils.dealVolleyError(volleyError, url);
            }
        });
        this.listener = responseListener;
        this.setRetryPolicy(new DefaultRetryPolicy(20 * 1000, 0, 1.0f));
        LogUtils.e("request-start--->");
        LogUtils.e(url);
        LogUtils.e(params);
        LogUtils.e("request-start--->");
    }
}

set timeout time.

回答4:

Try not using the require statement to connect to your database when sending request to a PHP file using volley. I've noticed a time-out only when I use something like (require "init.php") But when I directly put my DB connection information in the same file everything seems to work just fine.

回答5:

request.setRetryPolicy(new DefaultRetryPolicy( 50000, 5, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT))