XMPP messages lost on Android while switching data connectivity (e.g. turning Wifi of, GSM <-> Wifi switch)

Question

I'm developing a chat application in android. Using XMPP server. PHP server has been migrated to ejabber.

My notification works properly in all scenarios. But in one case I am losing the XMPP messages. In fact I am not getting notifications.

In detail, I am turning off the WiFi or data connection. and after turning off WiFi or data connection any notification sent to me that is not getting. after when I turn ON the WiFi or data connection, I am not able to get the messages which were sent to me.

I have implemented service in background. that makes xmpp connection always live.

I getting this error while i turn OFF the WiFi connection.

java.net.SocketException: sendto failed: EPIPE (Broken pipe)
java.net.SocketException: recvfrom failed: ETIMEDOUT (Connection timed out)
   at libcore.io.IoBridge.maybeThrowAfterSendto(IoBridge.java:506)
   at libcore.io.IoBridge.sendto(IoBridge.java:475)
   at java.net.PlainSocketImpl.write(PlainSocketImpl.java:508)
   at java.net.PlainSocketImpl.access$100(PlainSocketImpl.java:46)
   at java.net.PlainSocketImpl$PlainSocketOutputStream.write(PlainSocketImpl.java:270)
   at java.io.OutputStreamWriter.flushBytes(OutputStreamWriter.java:167)
   at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:158)
   at java.io.BufferedWriter.flush(BufferedWriter.java:124)
   at org.jivesoftware.smack.PacketWriter.writePackets(PacketWriter.java:286)
   at org.jivesoftware.smack.PacketWriter.access$12(PacketWriter.java:270)
   at org.jivesoftware.smack.PacketWriter$1.run(PacketWriter.java:137)
Caused by: libcore.io.ErrnoException: sendto failed: EPIPE (Broken pipe)
   at libcore.io.Posix.sendtoBytes(Native Method)
   at libcore.io.Posix.sendto(Posix.java:146)
   at libcore.io.BlockGuardOs.sendto(BlockGuardOs.java:177)
   at libcore.io.IoBridge.sendto(IoBridge.java:473)
   ... 9 more
   at libcore.io.IoBridge.maybeThrowAfterRecvfrom(IoBridge.java:552)
   at libcore.io.IoBridge.recvfrom(IoBridge.java:516)
   at java.net.PlainSocketImpl.read(PlainSocketImpl.java:489)
   at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46)
   at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:241)
   at java.io.InputStreamReader.read(InputStreamReader.java:244)
   at java.io.BufferedReader.read(BufferedReader.java:310)
   at org.jivesoftware.smack.XMPPConnection$AliveReader.read(XMPPConnection.java:1122)
   at org.kxml2.io.KXmlParser.fillBuffer(KXmlParser.java:1496)
   at org.kxml2.io.KXmlParser.peekType(KXmlParser.java:979)
   at org.kxml2.io.KXmlParser.next(KXmlParser.java:346)
   at org.kxml2.io.KXmlParser.next(KXmlParser.java:310)
   at org.jivesoftware.smack.PacketReader.parsePackets(PacketReader.java:321)
   at org.jivesoftware.smack.PacketReader.access$1(PacketReader.java:216)
   at org.jivesoftware.smack.PacketReader$1.run(PacketReader.java:70)
Caused by: libcore.io.ErrnoException: recvfrom failed: ETIMEDOUT (Connection timed out)
   at libcore.io.Posix.recvfromBytes(Native Method)
   at libcore.io.Posix.recvfrom(Posix.java:131)
   at libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:164)
   at libcore.io.IoBridge.recvfrom(IoBridge.java:513)
   ... 13 more

Answer 1

So to install mod_archive I need to do this, the typical: Write following line in cmd. (For cent Os)

Login as root Create new directory:

mkdir ejabberd_archive_plugin
cd ejabberd_archive_plugin

now get the latest ejabberd modules using following command

yum https://svn.process-one.net/ejabberd-modules
cd ejabberd-modules/mod_archive/trunk
./build.sh

Now go to ebin directory using following cmd and get the list of all *.beam files for ejabberd archive plugins.

root@ns1 [/ejabberd_archive_plugin/ejabberd-modules/mod_archive/trunk/ebin]# ls –l

Using following cmd you will get all ejabberd *.beam files list when ejabberd setup and configure.

root@ns1 [/usr/lib64/ejabberd/ebin]# ls -l

Now copy all *.beam (archive plugins) files to ejabberd ebin directory using following cmd

root@ns1 [/]# cp /ejabberd_archive_plugin/ejabberd-modules/mod_archive/trunk/ebin   /usr/lib64/ejabberd/ebin

Now go to following URL and copy all sql table queries and run in phpmyadmin (ejabberd database)

https://svn.process-one.net/ejabberd-modules/mod_archive/trunk/src/mod_archive_odbc_mysql.sql

Now configure ejjaberd.cfg using following cmd

root@ns1 [/etc/ejabberd]# vi ejabberd.cfg 
Add the following line into ejabberd.cfg file in modules configuration section
{mod_archive_odbc, [{database_type, "mysql"}, {default_auto_save, true}, {enforce_default_auto_save, true}]},

Now restart the ejabberd service.

root@ns1 [/etc/ejabberd]# sudo service ejabberd restart