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How to resolve java.net.UnknownHostException

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问题 I was taken internet permission in manifest file. My mobile network connection is also working. The main code: /** * Created by Yogesh on 5/07/2016. */ public class All_Item_Fragment extends android.support.v4.app.ListFragment { // Declare Variables JSONArray jsonarray = null; ListView list; ListViewAdapter adapter; ArrayList<HashMap<String, String>> itemlist; static String NAME = "name"; static String DESCRIPTION = "Description"; static String PRICE = "price"; static String IMAGE = "image

How to resolve java.net.UnknownHostException

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UnknowHostException cannot recover when network is back but restart JVM solved it

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问题 From one timepoint, our JVM(In fact a Yarn NodeManager) start to report UnknownHostException; It is reported by JVM code return InetAddress.getByName(host); for the next more than 2 days, the exception always exists; During the time it is reporting this error, I do the following test: During the error happening, ping could succeed and get the IP address(Very weird); During the error, I write a simple test case to check the hostname resolve, it also could succeeded: After we restarted the JVM,

UnknowHostException cannot recover when network is back but restart JVM solved it

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UnknownHostException in android : Wifi issue

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问题 I have get UnknownhostException in parsing JSON data from server, My URL working on : http://jsonlint.com on real device browser(data plan only) Sometimes its working on PC browser and sometimes not. Actually I have get the wifi issue, Sometimes its working on wifi connection, when its not, I have restarted my wifi and its worked, and after some time the same issue came, I want to get the permanent solution for this wifi connection issue, Restarting the Wifi is never a solution on the

Microsoft Translate API for Android gives UnknownHostException

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问题 I have tried the following code to implement a translator app using Microsoft Translator API library found here. I have a working internet connection and I have generated the a valid client id and secret but whenever I try to run the code I get the java.net.UnknownHostException . My code: StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(policy); Translate.setClientId("Screened for the question"); //Change this Translate

UnknownHostException error, building java grpc example

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问题 I am following this grpc tutorial and I haven't even been able to make it through the first step. The first step is to git clone the project and then run cd examples ./gradlew installDist I am hit with this stack trace Downloading https://services.gradle.org/distributions/gradle-2.13-bin.zip Exception in thread "main" java.net.UnknownHostException: services.gradle.org at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184) at java.net.SocksSocketImpl.connect

How to know the cause of UnknownHostException?

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问题 An UnknownHostException is thrown if a server is down or if there is no internet connection. How can I determine if the UnknownHostException is thrown because the server is down or there is no internet connection? The reason for this is I need to notify the user about the cause of the error. And I have to display something like this "Sorry. The service is currently not available. Please try again later" or "You do not have an internet connection". 回答1: You could check the network state to

Unable to resolve host: URL No address associated with hostname

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问题 I have an web service call to bring down a JSON object and it only works if I have the IP address and not the host name. I have been fine using IP addresses but now I need to have the host name. Here is my code StringBuilder stringBuilder = new StringBuilder(); HttpParams httpParams = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpParams, 3000); HttpConnectionParams.setSoTimeout(httpParams, 7000); DefaultHttpClient httpClient = new DefaultHttpClient(httpParams); HttpPost

Unable to resolve host: URL No address associated with hostname

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I have an web service call to bring down a JSON object and it only works if I have the IP address and not the host name. I have been fine using IP addresses but now I need to have the host name. Here is my code StringBuilder stringBuilder = new StringBuilder(); HttpParams httpParams = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpParams, 3000); HttpConnectionParams.setSoTimeout(httpParams, 7000); DefaultHttpClient httpClient = new DefaultHttpClient(httpParams); HttpPost httpost = new HttpPost(URL); try { HashMap<String,String> params = new HashMap<String,String>(); //