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From "Pavel Moravec (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (QPID-5107) Trace queue&session deletion statistics show zero values for some counters everytime
Date Tue, 03 Sep 2013 09:02:00 GMT

     [ https://issues.apache.org/jira/browse/QPID-5107?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pavel Moravec updated QPID-5107:
--------------------------------

    Attachment: QPID-5107_debugStats.patch

Chuck's enhancement makes sense, though having the drawback in explicitly calling debugStats
at the beginning of destructor/closing method of every manageable object. As generic Class.cpp
destructor can't call debugStats method since queue and session stats are already wrong ("over-updated").

Also, as different exchange types might "over-update" statistics in future, I decided to call
the debugStats() method from individual destructors of all exchange types and not from 

QPID_BROKER_INLINE_EXTERN virtual qpid::broker::Exchange::~Exchange();

Attached is a patch for that. It lacks calling debugStats for memory, as the class qpid::sys::posix::MemStat
does not have management object declared, just provided in method argument. Anyway, there
is imho no need to fix this as memory statistics are empty now (check current trace "Mgmt
delete memory. id:amqp-broker Statistics: {}").

Leaving both variants of the patches to let upstream to chose.
                
> Trace queue&session deletion statistics show zero values for some counters everytime
> ------------------------------------------------------------------------------------
>
>                 Key: QPID-5107
>                 URL: https://issues.apache.org/jira/browse/QPID-5107
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.22
>            Reporter: Pavel Moravec
>            Priority: Minor
>              Labels: easyfix, easytest, patch
>         Attachments: QPID-5107_debugStats.patch, QPID-5107.patch
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> Description of problem:
> qpid trace/logs statistics about object deletion. However some of these data are wrong.
In particular msgDepth for a queue is everytime zero (and msgTotalDequeues equals to msgTotalEnqueues
despite no consumer was subscribed to the queue), or unackedMessages for a session is zero
everytime as well.
> Version-Release number of selected component (if applicable):
> qpid 0.22
> How reproducible:
> 100%
> Steps to Reproduce:
> 1) msgDepth:0 for queue:
> echo "auth=no" > /etc/qpid/qpidd.conf
> echo "trace=yes" >> /etc/qpid/qpidd.conf
> echo "log-to-file=/tmp/qpidd.log" >> /etc/qpid/qpidd.conf
> rm -rf /var/lib/qpidd/* /tmp/qpidd.log
> service qpidd restart
> qpid-send -m 123 -a "testQueue; {create:always, delete:always}"
> sleep 10  # just to let periodic processing to run & print out the stats
> grep "Mgmt delete queue" /tmp/qpidd.log
> Actual results:
> 2013-08-29 14:05:38 [Model] trace Mgmt delete queue. id:testQueue Statistics: {acquires:123,
bindingCount:0, bindingCountHigh:0, bindingCountLow:0, byteDepth:0, byteFtdDepth:0, byteFtdDequeues:0,
byteFtdEnqueues:0, bytePersistDequeues:0, bytePersistEnqueues:0, byteTotalDequeues:0, byteTotalEnqueues:0,
byteTxnDequeues:0, byteTxnEnqueues:0, consumerCount:0, consumerCountHigh:0, consumerCountLow:0,
discardsLvq:0, discardsOverflow:0, discardsPurge:0, discardsRing:0, discardsSubscriber:0,
discardsTtl:0, flowStopped:False, flowStoppedCount:0, messageLatencyAvg:0, messageLatencyCount:0,
messageLatencyMax:0, messageLatencyMin:0, msgDepth:0, msgFtdDepth:0, msgFtdDequeues:0, msgFtdEnqueues:0,
msgPersistDequeues:0, msgPersistEnqueues:0, msgTotalDequeues:123, msgTotalEnqueues:123, msgTxnDequeues:0,
msgTxnEnqueues:0, releases:0, reroutes:0, unackedMessages:0, unackedMessagesHigh:0, unackedMessagesLow:0}
> Expected results:
> acquires:0
> msgTotalDequeues:0
> (several other counters are supposed to be wrong as well like byteFtdDequeues)
> 2) Reproducer for unackedMessages:0 for session:
> qpid-send -m 11 -a "myQueue; {create:always}"
> qpid-receive -m 100 -a "myQueue; {create:always}" -f
> (in another terminal)
> qpid-tool
> list connection
> call <ID_of_qpid-receive-connection> close
> and now check result:
> grep Tx /tmp/qpidd.log | grep session
> should return "unackedMessages:11" but returns zero.

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