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https://issues.apache.org/jira/browse/HAMA-362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13015183#comment-13015183
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Thomas Jungblut commented on HAMA-362:
--------------------------------------
Okay this was obvious:
{noformat}
java.io.IOException: Call to localhost/127.0.0.1:30005 failed on local
exception: java.io.IOException: *Can't write:
org.apache.hama.bsp.ByteMessage@716cb7 as class org.apache.hama.bsp.BSPMessage*
at org.apache.hadoop.ipc.Client.wrapException(Client.java:775)
at org.apache.hadoop.ipc.Client.call(Client.java:743)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
at $Proxy0.put(Unknown Source)
at org.apache.hama.bsp.BSPPeer.sync(BSPPeer.java:196)
at
org.apache.hama.bsp.TestBSPPeer$BSPPeerThread.runTest(TestBSPPeer.java:132)
at
net.sourceforge.groboutils.junit.v1.TestRunnable.run(TestRunnable.java:154)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.IOException: Can't write:
org.apache.hama.bsp.ByteMessage@716cb7 as class org.apache.hama.bsp.BSPMessage
at
org.apache.hadoop.io.ObjectWritable.writeObject(ObjectWritable.java:162)
at org.apache.hadoop.ipc.RPC$Invocation.write(RPC.java:112)
at org.apache.hadoop.ipc.Client$Connection.sendParam(Client.java:475)
at org.apache.hadoop.ipc.Client.call(Client.java:721)
... 6 more
{noformat}
> Design a new data structure for tag and message data of BSPMessage
> ------------------------------------------------------------------
>
> Key: HAMA-362
> URL: https://issues.apache.org/jira/browse/HAMA-362
> Project: Hama
> Issue Type: New Feature
> Components: bsp
> Affects Versions: 0.3.0
> Reporter: Edward J. Yoon
> Fix For: 0.3.0
>
> Attachments: 362.patch
>
>
> The tag and message type are byte[]. However, I guess, the message of
> BSPMessage (almost) will be a {adjacent, vector, .., etc} *list*.
> By supporting generic datatypes, it will be able to represent any data
> structure and make easy-to-program.
> And, It should be compressible, writable, and flexible.
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