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From "Gordon Sim (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (QPID-4343) cluster initial update stall when a queue has >10k messages with message groups set
Date Tue, 12 Mar 2013 17:21:13 GMT

     [ https://issues.apache.org/jira/browse/QPID-4343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gordon Sim closed QPID-4343.
----------------------------

    Resolution: Won't Fix

Cluster has been removed from trunk, so this issue is no longer reproducible there.
                
> cluster initial update stall when a queue has >10k messages with message groups set
> -----------------------------------------------------------------------------------
>
>                 Key: QPID-4343
>                 URL: https://issues.apache.org/jira/browse/QPID-4343
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.18
>            Reporter: Pavel Moravec
>              Labels: patch
>         Attachments: bz854666.patch
>
>
> Description of problem:
> Having qpid broker in a cluster and using message groups, an attempt to join a clustered
peer causes cluster stall during initial update process, when some queue has >10k messages
with message groups set.
> The reason is that updater node sends information about message groups in ClusterConnectionQueueObserverStateBody
message (exactly one message per one queue). If some queue has "too much" messages with msg.groups,
such ClusterConnectionQueueObserverStateBody message does not fit into one AMQP frame and
it is silently(!) dropped by the updater.
> Updatee node then waits for the message while updater node (and consequently whole cluster)
waits for updatee to mark itself as ready.
> Version-Release number of selected component (if applicable):
> 0.14-21, almost surely in 0.18
> How reproducible:
> 100%
> Steps to Reproduce:
> 1. Have 2node cluster with 1 node running
> 2. Produce at least 10k messages with message groups to it:
> qpid-send --group-key "GROUP_KEY" -m 10000 -a "groupQ; {create:always, node:{type:queue,
x-declare:{ arguments:{'qpid.group_header_key':'GROUP_KEY', 'qpid.shared_msg_group':1 }}}}"
> 3. (re)start 2nd node twice - due to some unknown reason, the first start succeeds while
the second does not.
> Actual results:
> New joiner stalls the cluster.
> Expected results:
> No broker joining a cluster can stall the cluster.
> Additional info:
> patch proposed

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