Hi,
I am creating a simple Android app for reading user tasks from server using
Apache Mina.
When tested with Java Swing client everything works fine.On Android however,
a run into ia problem.
The client connects ok, but after I get A protocolDecoderException when
receiveing message from server.
I am using Mina 2.0.1 stable
I am using Objectserialization codec:
acceptor.getFilterChain().addLast( "codec",
new ProtocolCodecFilter( new
ObjectSerializationCodecFactory() ) );
In client handler a get the ProtocolDecoderException:
java.lang.NullPointerException (Hexdump follows
Note; after conversion the hex dump contains this:
¸¬í sr org.jbpm.task.service.Commandxp sr java.util.ArrayListxp w sq
~ w
xx~r !org.jbpm.task.service.CommandNamexr java.lang.Enumxpt
QueryTaskSummaryResponse
Full error listing bellow:
Thanks a lot for any advice
Regards Matus
11-05 10:06:25.658: INFO/System.out(1801): [2010:11:309 10:11:515:exception]
Uncaught exception on client
11-05 10:06:25.658: INFO/System.out(1801):
org.apache.mina.filter.codec.ProtocolDecoderException:
java.lang.NullPointerException (Hexdump: 00 00 01 7F AC ED 00 05 73 72 01 00
1D 6F 72 67 2E 6A 62 70 6D 2E 74 61 73 6B 2E 73 65 72 76 69 63 65 2E 43 6F
6D 6D 61 6E 64 78 70 00 00 00 00 73 72 01 00 13 6A 61 76 61 2E 75 74 69 6C
2E 41 72 72 61 79 4C 69 73 74 78 70 00 00 00 01 77 04 00 00 00 01 73 71 00
7E 00 02 00 00 00 01 77 04 00 00 00 0A 73 72 01 00 1F 6F 72 67 2E 6A 62 70
6D 2E 74 61 73 6B 2E 71 75 65 72 79 2E 54 61 73 6B 53 75 6D 6D 61 72 79 78
70 77 9E 00 00 00 00 00 00 00 01 01 00 16 50 65 72 66 6F 72 6D 61 6E 63 65
20 45 76 61 6C 75 61 74 69 6F 6E 01 00 22 50 6C 65 61 73 65 20 70 65 72 66
6F 72 6D 20 61 20 73 65 6C 66 2D 65 76 61 6C 75 74 61 74 69 6F 6E 2E 01 00
22 50 6C 65 61 73 65 20 70 65 72 66 6F 72 6D 20 61 20 73 65 6C 66 2D 65 76
61 6C 75 74 61 74 69 6F 6E 2E 01 00 08 52 65 73 65 72 76 65 64 00 00 00 00
00 01 00 05 6B 72 69 73 76 01 00 05 6B 72 69 73 76 01 00 00 01 2C 1B 7F 28
78 01 00 00 01 2C 1B 7F 28 78 00 78 78 78 7E 72 01 00 21 6F 72 67 2E 6A 62
70 6D 2E 74 61 73 6B 2E 73 65 72 76 69 63 65 2E 43 6F 6D 6D 61 6E 64 4E 61
6D 65 78 72 01 00 0E 6A 61 76 61 2E 6C 61 6E 67 2E 45 6E 75 6D 78 70 74 00
18 51 75 65 72 79 54 61 73 6B 53 75 6D 6D 61 72 79 52 65 73 70 6F 6E 73 65)
11-05 10:06:25.679: INFO/System.out(1801): at
org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:251)
11-05 10:06:25.701: INFO/System.out(1801): at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
11-05 10:06:25.720: INFO/System.out(1801): at
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
11-05 10:06:25.720: INFO/System.out(1801): at
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)
11-05 10:06:25.798: INFO/System.out(1801): at
org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:119)
11-05 10:06:25.798: INFO/System.out(1801): at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
11-05 10:06:25.798: INFO/System.out(1801): at
org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:426)
11-05 10:06:25.798: INFO/System.out(1801): at
org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:692)
11-05 10:06:25.798: INFO/System.out(1801): at
org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:645)
11-05 10:06:25.798: INFO/System.out(1801): at
org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:634)
11-05 10:06:25.798: INFO/System.out(1801): at
org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:66)
11-05 10:06:25.798: INFO/System.out(1801): at
org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1078)
11-05 10:06:25.857: INFO/System.out(1801): at
org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
11-05 10:06:25.859: INFO/System.out(1801): at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
11-05 10:06:25.859: INFO/System.out(1801): at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
11-05 10:06:25.859: INFO/System.out(1801): at
java.lang.Thread.run(Thread.java:1096)
11-05 10:06:25.859: INFO/System.out(1801): Caused by:
java.lang.NullPointerException
11-05 10:06:25.879: INFO/System.out(1801): at
java.io.ObjectStreamField.resolve(ObjectStreamField.java:351)
11-05 10:06:25.879: INFO/System.out(1801): at
java.io.ObjectInputStream.readNewClassDesc(ObjectInputStream.java:1863)
11-05 10:06:25.879: INFO/System.out(1801): at
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:826)
11-05 10:06:25.879: INFO/System.out(1801): at
java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:2066)
11-05 10:06:25.879: INFO/System.out(1801): at
java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:929)
11-05 10:06:25.879: INFO/System.out(1801): at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:2285)
11-05 10:06:25.879: INFO/System.out(1801): at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:2240)
11-05 10:06:25.879: INFO/System.out(1801): at
org.apache.mina.core.buffer.AbstractIoBuffer.getObject(AbstractIoBuffer.java:1982)
11-05 10:06:25.879: INFO/System.out(1801): at
org.apache.mina.filter.codec.serialization.ObjectSerializationDecoder.doDecode(ObjectSerializationDecoder.java:92)
11-05 10:06:25.879: INFO/System.out(1801): at
org.apache.mina.filter.codec.CumulativeProtocolDecoder.decode(CumulativeProtocolDecoder.java:178)
11-05 10:06:25.879: INFO/System.out(1801): at
org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:241)
11-05 10:06:25.909: INFO/System.out(1801): ... 15 more
