Android ConnectException - No route to host

Question

So I have an android application that communicate with a server through Socket. It was working yesterday at a point. In the evening I wanted to work more on it but it throws a exception without me modifying the code at all. After remaking the project 2 times I tested the connection with an app that I know that works 100% because I tried it few days ago.

After researching my problem on web I found out that it might be due to a malware software i installed yesterday. I uninstalled it but it still doesn't work.

I ll not post any code here because it isn't relevant. (as i said i tried with something that should work but it doesn't)

java.net.ConnectException: failed to connect to /(my ip is here) (port 2225): connect failed: EHOSTUNREACH (No route to host)
                                                                    at libcore.io.IoBridge.connect(IoBridge.java:124)
                                                                    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
                                                                    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:163)
                                                                    at java.net.Socket.startupSocket(Socket.java:592)
                                                                    at java.net.Socket.<init>(Socket.java:226)
                                                                    at com.shoppiness.radu.jshoppiness.Client.run(Client.java:63)
                                                                    at com.shoppiness.radu.jshoppiness.MainActivity$connectTask.doInBackground(MainActivity.java:77)
                                                                    at com.shoppiness.radu.jshoppiness.MainActivity$connectTask.doInBackground(MainActivity.java:61)
                                                                    at android.os.AsyncTask$2.call(AsyncTask.java:295)
                                                                    at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                                                                    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
                                                                    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                                                    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                                                    at java.lang.Thread.run(Thread.java:818)
                                                                 Caused by: android.system.ErrnoException: connect failed: EHOSTUNREACH (No route to host)
                                                                    at libcore.io.Posix.connect(Native Method)
                                                                    at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:111)
                                                                    at libcore.io.IoBridge.connectErrno(IoBridge.java:137)
                                                                    at libcore.io.IoBridge.connect(IoBridge.java:122)
                                                                    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183) 
                                                                    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:163) 
                                                                    at java.net.Socket.startupSocket(Socket.java:592) 
                                                                    at java.net.Socket.<init>(Socket.java:226) 
                                                                    at com.shoppiness.radu.jshoppiness.Client.run(Client.java:63) 
                                                                    at com.shoppiness.radu.jshoppiness.MainActivity$connectTask.doInBackground(MainActivity.java:77) 
                                                                    at com.shoppiness.radu.jshoppiness.MainActivity$connectTask.doInBackground(MainActivity.java:61) 
                                                                    at android.os.AsyncTask$2.call(AsyncTask.java:295) 
                                                                    at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
                                                                    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
                                                                    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
                                                                    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
                                                                    at java.lang.Thread.run(Thread.java:818)

Please refer this:https://stackoverflow.com/questions/12522396/tcp-ip-client-ehostunreach-no-route-to-host — , Aug 29 '17 at 18:51

score 0 · Answer 1 · answered Aug 30 '17 at 13:59

0

If you are using a lan server make sure both devices (android and server) are on the same wifi.

Your firewall might be blocking the connection to.

answered Aug 30 '17 at 13:59

Dave Henderson

9
4

Server is supposed to recieve message from android devices all around the country. I tried to connect it on mobile data then on local wi fi but both do not work. – Radu Aug 30 '17 at 14:01

score 0 · Answer 2 · answered Aug 30 '17 at 14:04

0

So if you are hosting the server, make sure you portforwarded the wifi the server is running on. That will allow trafic to go through your router and to server.

answered Aug 30 '17 at 14:04

Dave Henderson

9
4

I did it. Few days ago clients could connect at ports I'm trying right now. It's not about portforwarding. – Radu Aug 30 '17 at 15:06
Should I try connecting to it? – Dave Henderson Aug 30 '17 at 15:58
You can try. 5.15.78.212 ip, 2223 port. – Radu Aug 30 '17 at 16:02
I just coded fast a client version for computer. It is located on the server. The thing is that when I try to put "localhost" instead of the actual ip it works. But when I type there my ip it doesn't. – Radu Aug 30 '17 at 16:04
@Radu ill try it – Dave Henderson Aug 31 '17 at 18:42
Dave server is down right now. But i apreciate you want to help. Thanks. – Radu Aug 31 '17 at 18:43
@Radu Ok your welcome. Hopefully you can get it to work! – Dave Henderson Aug 31 '17 at 18:45
I hope so. It s my laptop that causes trouble. I tried with a code that is supposed to work but it doesnt. It keeps saying that there is no route to host. – Radu Aug 31 '17 at 18:47

score -1 · Answer 3 · answered Aug 30 '17 at 01:53

-1

This is probably just because your device is not connectd to the internet. Connect it to wifi and try again. Good luck

answered Aug 30 '17 at 01:53

Dave Henderson

9
4

2

It is connected. – Radu Aug 30 '17 at 06:35

Android ConnectException - No route to host

3 Answers3