[jboss-jira] [JBoss JIRA] Created: (JGRP-1024) Join and state transfer locks up entire cluster

Mon Aug 17 11:21:26 EDT 2009

Join and state transfer locks up entire cluster
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                 Key: JGRP-1024
                 URL: https://jira.jboss.org/jira/browse/JGRP-1024
             Project: JGroups
          Issue Type: Bug
    Affects Versions: 2.6.11, 2.6.10, 2.6.9
            Reporter: Vladimir Blagojevic
            Assignee: Vladimir Blagojevic
             Fix For: 2.6.12, 2.8

When a new node joins a cluster and requests a join-and-state-transfer, coordinator C receives a request and calls a startFlush (CoordGmsImpl.java:400). Call startFlush might fail to due timeout (see FLUSH#startFlush(List<Address> flushParticipants) ). This causes function to return false and a repeat of start flush to be issue by the caller. However, since switch flushInProgress is still true all repeated requests for start flush fail. On the other hand joining node goes into connect loop - it never receives a new view due to a failed flush at coordinator C and it never issues necessary stopFlush that would switch back flushInProgress to false. So coordinator C never comes out of stuck state and client stays in stuck state. The end result is that we have a lockup forever.

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