[jboss-jira] [JBoss JIRA] (JGRP-2090) JGRP000027: failed passing message up

[Paul Illingworth (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-2090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13333200#comment-13333200 ] 

Paul Illingworth commented on JGRP-2090:
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I am seeing the same issue. For me the problem is that I am on a development network where there are several JGroups domains/clusters active all using the same UDP muticast addresses and ports but are differentiated by domain/cluster name. The other domains on the network are using JGroups 3.6.3 whilst I am using 3.6.11 - this means I get the NPE.

I can avoid the problem by changing my UDP multicast address or port to "physically" separate the domains/cluster instead of just relying on the domain name.

> JGRP000027: failed passing message up
> -------------------------------------
>
>                 Key: JGRP-2090
>                 URL: https://issues.jboss.org/browse/JGRP-2090
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 3.6.10
>            Reporter: Will Wright
>            Assignee: Bela Ban
>             Fix For: 3.6.11
>
>
> The JGroups library is generating NullPointerExceptions when attempting to process incoming messages. From what I can tell this is due to it looking for an incorrect message header. 
> The TP object has a protocol id of 75 despite being a TUNNEL which ought to have an id of 24. The id is being correctly assigned to 24 at the Protocol.id member variable declaration, but is then subsequently changed to 75 by the TP.init method. This seems to have been caused by commit [6bc167f7e0181af32e1930935d8cf0efdc1e82f0|https://github.com/belaban/JGroups/commit/6bc167f7e0181af32e1930935d8cf0efdc1e82f0#diff-ce9d05d173a85bd820c6538f1e231645] which has the message "Added TP to jg-protocols.xml". If I backout this change to the TP.init method so as to not update the id then my application receives the incoming messages fine. 
> java.lang.NullPointerException: null
> 	at org.jgroups.protocols.TP$SingleMessageHandler.run(TP.java:1872)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> 	at java.lang.Thread.run(Thread.java:745)



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