[jboss-jira] [JBoss JIRA] Updated: (JGRP-1060) NAKACK has inconsistent internal state after concurrent node startup

[Bela Ban (JIRA)]

     [ https://jira.jboss.org/jira/browse/JGRP-1060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban updated JGRP-1060:
---------------------------

        Fix Version/s: 2.4.7
                       2.6.13
    Affects Version/s: 2.4.6


Yes, this is a bug, caused by NAKACK.SET_DIGEST (called on receiving the join response and on receiving the state's digest) *clearing* the entire received_msgs table.

In 2.8, NAKACK.SET_DIGEST does *not* clear the table, but only replaces existing elements, so the bug won't occur there

Assigning the issue to 2.4.7 and 2.6.13

> NAKACK has inconsistent internal state after concurrent node startup
> --------------------------------------------------------------------
>
>                 Key: JGRP-1060
>                 URL: https://jira.jboss.org/jira/browse/JGRP-1060
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 2.4.5, 2.4.6
>            Reporter: Dennis Reed
>            Assignee: Bela Ban
>             Fix For: 2.4.7, 2.6.13
>
>
> Three nodes are started concurrently.  The log from the second node to join shows the following (IPs/ports have been replaced)
>     05:26:00,594 45102 INFO  [org.jboss.cache.TreeCache] (main:) viewAccepted(): [node1:1234|1] [node1:1234, node2:1234]
>     05:26:00,732 45240 INFO  [org.jboss.cache.TreeCache] (main:) TreeCache local address is node2:1234
>     05:26:00,852 45360 INFO  [org.jboss.cache.TreeCache] (IncomingPacketHandler (channel=Tomcat-DefaultPartition):) viewAccepted(): [node1:1234|2] [node1:1234, node2:1234, node3:1234]
>     05:26:00,861 45369 INFO  [org.jboss.cache.TreeCache] (IncomingPacketHandler (channel=Tomcat-DefaultPartition):) received the state (size=1024 bytes)
> Then many instances of the following logs for more than a day:
>     WARN  [org.jgroups.protocols.pbcast.NAKACK] (IncomingPacketHandler (channel=Tomcat-DefaultPartition):) node2:1234] discarded message from non-member node3:1234, my view is [node1:1234|2] [node1:1234, node2:1234, node3:1234]
>     ERROR [org.jgroups.protocols.pbcast.NAKACK] (Timer-3:) sender node3:1234 not found in received_msgs
> For these messages to be logged, NAKACK is in an inconsistent internal state.  The addresses in "members" does not match "received_msgs".

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