Re: [Pyxida-users] Pyxida developer + help

[Peter P. <pr...@do...>]

Jonathan, can you shed some light into this?

Cheers,
   Peter

Eric Chan-Tin wrote:
> Thanks for the help.
> 
> The problem was that I was using jdk 1.6 and even though I cleaned and 
> recompiled util-prp and ASync and copied the jar files to Pyxida/lib, it 
> still failed with the same error message. But I downgraded to jdk 1.5.0_09 
> and seems to be working fine now. I assume that some of the jar files in 
> Pyxida/lib were compiled under jdk1.5.
> 
> One more question though. Why are there "update1" and "update2"? More 
> specifically, why would CoordClient have two NCClient - a primaryNC and a 
> secondaryNC?
> 
> Let's say there are two Pyxida clients - A and B. In an update, update1 
> would refer to A and update2 would refer to B (B sends A a message). Is 
> that a correct interpretation?
> 
> Thank you,
> 
> Eric
> 
> On Mar 11 2008, Peter Pietzuch wrote:
> 
>> Dear Eric,
>>
>> Eric Chan-Tin wrote:
>>> I am interested in helping with the Pyxida project. I read a couple of 
>>> papers about how network coordinate systems (for example GNP or Vivaldi) 
>>> are insecure and wanted to implement some countermeasures against those 
>>> attacks. Instead of creating my own Vivaldi implementation, I thought of 
>>> just using Pyxida instead.
>> It's great to hear that you want to help out with the Pyxida project. Let 
>> me know when you have code to contribute and I'll set you up with 
>> developer access.
>>
>>> [quote] WA 1205186886103 NetUtil : Could not deserialize java object: 
>>> java.io.StreamCorruptedException: invalid type code: 80 WA 1205186886103 
>>> ObjComm$ReadConnHa: No valid msgObject received from 
>>> remoteAddr=<address>:55504. Ignoring. [\quote]
>> Usually, deserialisation problems like this one indicate that class files 
>> were compiled using different Java versions. Have you tried recompiling 
>> everything from scratch using, say, Java 1.5? Make sure that you also 
>> rebuild some of the helper libraries (i.e. prp-util).
>>
>> Let me know if you have any other questions.
>>
>> Cheers,
>>   Peter