Java.net.NoRouteToHostException:No route to Host:no further information__.net

I didn't know what the mistake was, and today I found the answer in an accident.

Error:

16:12:38,921 [ERROR]-++++ failed to get Sockio obj for:192.168.1.4:11211 16:12:38,921 [ERROR]-No route to Host:no Fu Rther Information Java.net.NoRouteToHostException:No route to host:no further information at sun.nio.ch.SocketCh
        Annelimpl.checkconnect (Native method) at Sun.nio.ch.SocketChannelImpl.finishConnect (socketchannelimpl.java:574) At Sun.nio.ch.SocketAdaptor.connect (socketadaptor.java:100) at COM.DANGA.MEMCACHED.SOCKIOPOOL$SOCKIO.GETSOC Ket (sockiopool.java:1612) at com.danga.memcached.sockiopool$sockio.<init> (sockiopool.java:1585) at Com.danga.MemCached.SockIOPool.createSocket (sockiopool.java:782) at Com.danga.MemCached.SockIOPool.selfMaint (  sockiopool.java:1331) at Com.danga.memcached.sockiopool$maintthread.run (sockiopool.java:1497) 16:12:38,921 [ERROR] -++++ failed to close socket: ++++ socket or it streams a lready null in Trueclose call 16:12:38,921 [ERROR]-++++ FAI led to close Sockio obj fromDeadpool 16:12:38,921 [ERROR]-++++ socket or its streams already null in Trueclose call Java.io.IOException: ++++ Socke T or its streams already null in Trueclose call at Com.danga.memcached.sockiopool$sockio.trueclose (Sockiopool.java : 1704) at Com.danga.MemCached.SockIOPool.selfMaint (sockiopool.java:1432) at Com.danga.MemCached.SockIOPoo L$maintthread.run (sockiopool.java:1497) 16:12:38,937 [ERROR]-++++ failed to close Sockio obj-Deadpool [ERROR]-++++ socket or its streams already null in Trueclose call Java.io.IOException: ++++ sockets or its streams Alrea DY null in Trueclose call at Com.danga.memcached.sockiopool$sockio.trueclose (sockiopool.java:1704) at COM . Danga. MemCached.SockIOPool.selfMaint (sockiopool.java:1432) at Com.danga.memcached.sockiopool$maintthread.run ( sockiopool.java:1497) 16:12:38,937 [ERROR]-++++ failed to close Sockio obj: Deadpool 16:12:38,937 [ERROR]-++++ Soc Ket or its streams already nUll in Trueclose call 

It was later queried that firewall settings might block such programs from accessing the network

But feel impossible, before the run is good, if the first firewall to block is impossible.

Then think of the original afternoon accidentally let the network broke, and then think: seems to be broken nets caused, the result of a test, really like some ...