我们开发了一个聊天应用程序。它在稳定的网络上运行良好，没有任何问题，但每当网络波动时，应用程序和服务器之间的连接性将继续丢失。很多次，connectionClosedOnError（）被调用，后面的Exceptions一直在变化。
1。）当连接丢失或wifi连接波动时，这也是connectionClosedOnError（）中的一个例外。
s W/System.err: java.io.EOFException
03-01 12:33:09.311 31636-31723/com.app.radius W/System.err: at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:169)
03-01 12:33:09.311 31636-31723/com.app.radius W/System.err: at java.io.InputStreamReader.read(InputStreamReader.java:233)
03-01 12:33:09.311 31636-31723/com.app.radius W/System.err: at java.io.BufferedReader.read(BufferedReader.java:325)
03-01 12:33:09.311 31636-31723/com.app.radius W/System.err: at org.jivesoftware.smack.util.ObservableReader.read(ObservableReader.java:41)
03-01 12:33:09.311 31636-31723/com.app.radius W/System.err: at org.kxml2.io.KXmlParser.fillBuffer(KXmlParser.java:1515)
03-01 12:33:09.311 31636-31723/com.app.radius W/System.err: at org.kxml2.io.KXmlParser.peekType(KXmlParser.java:992)
03-01 12:33:09.311 31636-31723/com.app.radius W/System.err: at org.kxml2.io.KXmlParser.next(KXmlParser.java:349)
03-01 12:33:09.312 31636-31723/com.app.radius W/System.err: at org.kxml2.io.KXmlParser.next(KXmlParser.java:313)
03-01 12:33:09.312 31636-31723/com.app.radius W/System.err: at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.parsePackets(XMPPTCPC onnection.java:1169)
03-01 12:33:09.312 31636-31723/com.app.radius W/System.err: at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.access$300(XMPPTCPCon nection.java:948)
03-01 12:33:09.312 31636-31723/com.app.radius W/System.err: at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader$1.run(XMPPTCPConnecti on.java:963)
03-01 12:33:09.312 31636-31723/com.app.radius W/System.err: at java.lang.Thread.run(Thread.java:818).
2。）这是切换数据wifi网络时引发的异常。
com.e0.chat D/SMACK﹕ XMPPConnection closed due to an exception (0)
04-28 10:18:35.237 1221-1276/com.e0.chat W/System.err﹕ java.net.SocketException: recvfrom failed: ETIMEDOUT (Connection timed out)
04-28 10:18:35.237 1221-1276/com.e0.chat W/System.err﹕ at libcore.io.IoBridge.maybeThrowAfterRecvfrom(IoBridge.java:592)
04-28 10:18:35.237 1221-1276/com.e0.chat W/System.err﹕ at libcore.io.IoBridge.recvfrom(IoBridge.java:556)
04-28 10:18:35.237 1221-1276/com.e0.chat W/System.err﹕ at java.net.PlainSocketImpl.read(PlainSocketImpl.java:485)
04-28 10:18:35.237 1221-1276/com.e0.chat W/System.err﹕ at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:37)
04-28 10:18:35.237 1221-1276/com.e0.chat W/System.err﹕ at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:237)
04-28 10:18:35.237 1221-1276/com.e0.chat W/System.err﹕ at java.io.InputStreamReader.read(InputStreamReader.java:231)
04-28 10:18:35.237 1221-1276/com.e0.chat W/System.err﹕ at java.io.BufferedReader.read(BufferedReader.java:325)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at org.jivesoftware.smack.util.ObservableReader.read(ObservableReader.java:41)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at org.kxml2.io.KXmlParser.fillBuffer(KXmlParser.java:1515)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at org.kxml2.io.KXmlParser.peekType(KXmlParser.java:992)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at org.kxml2.io.KXmlParser.next(KXmlParser.java:349)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at org.kxml2.io.KXmlParser.next(KXmlParser.java:313)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.parsePackets(XMPPTCPC onnection.java:1151)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.access$200(XMPPTCPCon nection.java:937)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader$1.run(XMPPTCPConnecti on.java:952)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at java.lang.Thread.run(Thread.java:818)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ Caused by: android.system.ErrnoException: recvfrom failed: ETIMEDOUT (Connection timed out)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at libcore.io.Posix.recvfromBytes(Native Method)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at libcore.io.Posix.recvfrom(Posix.java:161)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:250)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ at libcore.io.IoBridge.recvfrom(IoBridge.java:553)
04-28 10:18:35.242 1221-1276/com.e0.chat W/System.err﹕ ... 14 more.