Cometd + Android

[Venkatesh Arivazhagan]

Hello ,

We are in the process of developing an application on Android. We are using the jetty client 8.1.0 and cometd 2.4.0.

Things are well except for the following : 

* Socket timeout exception occurs pretty frequently.

* EOF file exception

Stack trace is as follows : 

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05-28 16:49:24.504: I/BayeuxClient@1096943280(23801): Messages failed [{id=42, connectionType=long-polling, channel=/meta/connect, clientId=1a7zkwhlwuowqgg5u}]

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801): org.eclipse.jetty.io.EofException

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:939)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.client.AsyncHttpConnection.handle(AsyncHttpConnection.java:86)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:609)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:45)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at java.lang.Thread.run(Thread.java:856)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801): Caused by: java.net.SocketException: sendto failed: EPIPE (Broken pipe)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at libcore.io.IoBridge.maybeThrowAfterSendto(IoBridge.java:496)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at libcore.io.IoBridge.sendto(IoBridge.java:479)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at java.nio.SocketChannelImpl.writeImpl(SocketChannelImpl.java:369)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at java.nio.SocketChannelImpl.write(SocketChannelImpl.java:327)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.io.nio.ChannelEndPoint.flush(ChannelEndPoint.java:292)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.flush(SelectChannelEndPoint.java:344)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.io.nio.ChannelEndPoint.flush(ChannelEndPoint.java:343)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.flush(SelectChannelEndPoint.java:319)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:866)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     ... 6 more

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801): Caused by: libcore.io.ErrnoException: sendto failed: EPIPE (Broken pipe)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at libcore.io.Posix.sendtoBytes(Native Method)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at libcore.io.Posix.sendto(Posix.java:139)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at libcore.io.BlockGuardOs.sendto(BlockGuardOs.java:169)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     at libcore.io.IoBridge.sendto(IoBridge.java:477)

05-28 16:49:24.504: I/BayeuxClient@1096943280(23801):     ... 13 more

05-28 16:49:24.504: I/com.conversionsupport.comet.ConsoleChatClient(23801): =========message on Connection Listener {message=[Lorg.cometd.bayeux.Message$Mutable;@419ad810, id=42, successful=false, channel=/meta/connect, exception=org.eclipse.jetty.io.EofException}

05-28 16:49:24.504: I/com.conversionsupport.comet.ConsoleChatClient(23801): =========Connection to Server Broken======

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801): Messages failed [{id=43, connectionType=long-polling, advice={timeout=0}, channel=/meta/connect, clientId=1a7zkwhlwuowqgg5u}]

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801): org.eclipse.jetty.io.EofException: early EOF

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.client.AbstractHttpConnection$Handler.earlyEOF(AbstractHttpConnection.java:350)

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:319)

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230)

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.client.AsyncHttpConnection.handle(AsyncHttpConnection.java:126)

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:609)

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:45)

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599)

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801):     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534)

05-28 16:49:33.254: I/BayeuxClient@1096943280(23801):     at java.lang.Thread.run(Thread.java:856)

05-28 16:49:33.257: I/com.conversionsupport.comet.ConsoleChatClient(23801): =========message on Connection Listener {message=[Lorg.cometd.bayeux.Message$Mutable;@41635d20, id=43, successful=false, channel=/meta/connect, exception=org.eclipse.jetty.io.EofException: early EOF}

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Has anyone else successfully implemented Cometd based apps on Android? It would be great to get some input on this. 

Also Also is Cometd a good choice for an Android app that will have very frequent updates from the server?

Thanks,

Venkey