问题
I have a project on Android, which needs to use asmack library to enable real time chat.
The key feature is reconnecting mechanism, that means my application can reconnect automatically whenever the internet connection loses.
Here is my code snippet:
ConnectionConfiguration connConfig = new ConnectionConfiguration(HOST, PORT);
connConfig.setSASLAuthenticationEnabled(true);
connConfig.setReconnectionAllowed(true);
XMPPConnection connection = new XMPPConnection(connConfig);
But I got this error whenever I turned off then turned on Wifi:
10-01 21:43:26.942: W/System.err(13695): javax.net.ssl.SSLException: Write error: ssl=0x5a4ad348: I/O error during system call, Broken pipe
10-01 21:43:27.002: W/System.err(13695): at org.apache.harmony.xnet.provider.jsse.NativeCrypto.SSL_write(Native Method)
10-01 21:43:27.012: W/System.err(13695): at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl$SSLOutputStream.write(OpenSSLSocketImpl.java:693)
10-01 21:43:27.012: W/System.err(13695): at java.io.OutputStreamWriter.flushBytes(OutputStreamWriter.java:167)
10-01 21:43:27.012: W/System.err(13695): at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:158)
10-01 21:43:27.012: W/System.err(13695): at java.io.BufferedWriter.flush(BufferedWriter.java:124)
10-01 21:43:27.012: W/System.err(13695): at org.jivesoftware.smack.PacketWriter.writePackets(PacketWriter.java:210)
10-01 21:43:27.012: W/System.err(13695): at org.jivesoftware.smack.PacketWriter.access$000(PacketWriter.java:42)
10-01 21:43:27.012: W/System.err(13695): at org.jivesoftware.smack.PacketWriter$1.run(PacketWriter.java:78)
10-01 21:43:27.092: W/System.err(13695): javax.net.ssl.SSLException: Read error: ssl=0x5a4ad348: I/O error during system call, Connection timed out
10-01 21:43:27.092: W/System.err(13695): at org.apache.harmony.xnet.provider.jsse.NativeCrypto.SSL_read(Native Method)
10-01 21:43:27.092: W/System.err(13695): at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl$SSLInputStream.read(OpenSSLSocketImpl.java:651)
10-01 21:43:27.092: W/System.err(13695): at java.io.InputStreamReader.read(InputStreamReader.java:244)
10-01 21:43:27.092: W/System.err(13695): at java.io.BufferedReader.read(BufferedReader.java:310)
10-01 21:43:27.092: W/System.err(13695): at org.kxml2.io.KXmlParser.fillBuffer(KXmlParser.java:1496)
10-01 21:43:27.092: W/System.err(13695): at org.kxml2.io.KXmlParser.peekType(KXmlParser.java:979)
10-01 21:43:27.092: W/System.err(13695): at org.kxml2.io.KXmlParser.next(KXmlParser.java:346)
10-01 21:43:27.092: W/System.err(13695): at org.kxml2.io.KXmlParser.next(KXmlParser.java:310)
10-01 21:43:27.092: W/System.err(13695): at org.jivesoftware.smack.PacketReader.parsePackets(PacketReader.java:326)
10-01 21:43:27.092: W/System.err(13695): at org.jivesoftware.smack.PacketReader.access$000(PacketReader.java:44)
10-01 21:43:27.092: W/System.err(13695): at org.jivesoftware.smack.PacketReader$1.run(PacketReader.java:71)
Anyone, who can solve this error, please help me!
回答1:
Use the latest smack api - I am using 4.1.0
Then set up re-connection like below:
ReconnectionManager manager = ReconnectionManager.getInstanceFor(connection);
manager.enableAutomaticReconnection();
It will automatically re-connect as described Here
回答2:
Asmack is supporting Re-connection properly, only problem is that You are using SASL Connection so this is giving problem for because you are trying same connection again on turn Wi-Fi off.Try with set SASL false
connConfig.setSASLAuthenticationEnabled(false);
required other wise disconnect manually
connection.disconnect();
回答3:
When setting up everything at the start, call
ReconnectionManager.setEnabledPerDefault(true);
Then connections created from then on will automatically reconnect.
回答4:
Don't use reconnection mechanism which is implemented in ASMACK.
Use:
connConfig.setReconnectionAllowed(false);
Instead, you should create BroadcastReceiver which listens to ConnectivityManager.CONNECTIVITY_ACTION. When connection to WIFI or other network is occurred, then you will receive the callback onReceive in your BroadcastReceiver.
来源：https://stackoverflow.com/questions/19117218/reconnectionmanager-in-asmack